Threshold water depth determination method and device based on upstream and downstream channel water level linkage

Abstract

The invention discloses a threshold water depth determination method and device based on upstream and downstream channel water level linkage, and relates to the technical field of inland river shipping or other related technical fields, and the method comprises the steps: obtaining the water level data of each hydrological station in the same statistical period, and carrying out the standardization processing of the obtained water level data of each hydrological station; based on the standardized water level data, calculating design water level values of the upstream and downstream channels under different assurance rates; based on the designed water level value, the designed ship full-load draft depth and the downstream hub threshold bottom elevation, the target threshold water depth needed by each hub on the downstream of the continuous cascade channel is determined. The technical problems that in the related technology, only the threshold water depth of a single ship lock is concerned in inland river shipping design, flexibility is low, and channel water level changes cannot be adapted are solved.

Description

Technical Field

[0001] This invention relates to the field of inland waterway shipping technology or other related fields. Specifically, it relates to a method and apparatus for determining threshold water depth based on the linkage of upstream and downstream waterway water levels. Background Technology

[0002] In inland waterway transportation systems, locks are crucial facilities for regulating water level differences and maintaining navigation capacity. Their design parameters directly affect the economy and safety of inland waterway transport. Among these parameters, the sill depth is a key indicator determining the lock's navigation capacity, directly impacting whether vessels can pass smoothly and ensuring safety during passage. However, in the context of continuous tiered waterways, the design of a single lock often cannot fully account for the impact of upstream and downstream water level changes, especially when water levels fluctuate significantly between high and low water seasons.

[0003] The design methods in related technologies only focus on the threshold water depth of a single lock, without fully considering the interaction between locks and other water conservancy projects in a continuous cascade waterway. This may result in design results that do not match actual operating conditions, especially when water levels change frequently.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a method and apparatus for determining the threshold water depth based on the linkage of upstream and downstream water levels, which at least solves the technical problem in related technologies that inland waterway shipping design only focuses on the threshold water depth of a single lock, resulting in low flexibility and inability to adapt to changes in water level.

[0006] According to one aspect of the present invention, a method for determining the threshold depth based on the linkage of upstream and downstream waterway water levels is provided, comprising: acquiring water level data of each hydrological station within the same statistical period, and standardizing the acquired water level data of each hydrological station; calculating the design water level values ​​of the upstream and downstream waterways under different guarantee rates based on the standardized water level data; and determining the target threshold depth required at each hub downstream of the continuous cascade waterway based on the design water level values, the design full-load draft of the vessel, and the sill bottom elevation of the downstream hub.

[0007] Optionally, the step of obtaining water level data of each hydrological station within the same statistical period includes: collecting hydrological observation data and vessel navigation data of multiple upstream and downstream cascade hubs in a continuous cascade waterway within the same statistical period; and generating water level data of each hydrological station based on the hydrological observation data and the vessel navigation data.

[0008] Optionally, the step of calculating the design water level values ​​of the upstream and downstream channels under different guarantee rates based on the standardized water level data includes: inputting the standardized water level data into a hydrological variable probability distribution model; fitting the water level sequence of each hydrological station through the hydrological variable probability distribution model, wherein the hydrological variable probability distribution model is a pre-trained model used to analyze the frequency distribution characteristics of different hydrological variables and determine the design water level value based on the frequency distribution characteristics; and using the hydrological variable probability distribution model to analyze the water level sequence and calculate the design water level values ​​under different guarantee rates.

[0009] Optionally, after standardizing the water level data of each hydrological station, the method further includes: analyzing the hydrological characteristics in the standardized water level data; dividing the annual cycle of the continuous cascade waterway into a high-water season and a low-water season based on the hydrological characteristics; and analyzing the statistical characteristic values ​​of the water level during the high-water season and the low-water season to obtain the seasonal difference characteristics of the associated threshold water depth.

[0010] Optionally, the step of determining the target threshold water depth required at each hub downstream of the continuous cascade waterway based on the design water level, the design full-load draft of the vessel, and the sill bottom elevation of the downstream hub includes: determining the minimum threshold water depth required at the downstream hub based on the design full-load draft of the vessel and a preset draft margin value; and adjusting the minimum threshold water depth based on the seasonal differences in the design water level, the sill bottom elevation of the downstream hub, and the associated threshold water depth to obtain the target threshold water depth required at each hub downstream of the continuous cascade waterway.

[0011] Optionally, the step of adjusting the minimum threshold depth based on the design water level, the elevation of the downstream hub threshold bottom, and the seasonal differences in the associated threshold depth to obtain the target threshold depth required at each hub downstream of the continuous cascade channel includes: obtaining a pre-set downstream hub threshold depth increase threshold and a depth adjustment range that meets the tonnage requirements of navigable vessels; and adjusting the minimum threshold depth based on the downstream hub threshold depth increase threshold, the depth adjustment range that meets the tonnage requirements of navigable vessels, the design water level, the elevation of the downstream hub threshold bottom, and the seasonal differences in the associated threshold depth to obtain the target threshold depth required at each hub downstream of the continuous cascade channel.

[0012] Optionally, after determining the required target threshold water depth at each hub downstream of the continuous cascade waterway based on the design water level, the design vessel's full-load draft, and the sill bottom elevation of the downstream hub, the method further includes: analyzing whether the target threshold water depth at each hub downstream of the continuous cascade waterway matches the sill water depth of the main shipping line lock during the high-water season; if the analysis results indicate that the target threshold water depth at each hub downstream of the continuous cascade waterway does not match the sill water depth of the main shipping line lock during the high-water season, the target threshold water depth is dynamically adjusted in conjunction with a predetermined water depth adjustment range and applicable conditions, wherein the applicable conditions include: draft depth adaptation conditions for vessels of different tonnages.

[0013] According to another aspect of the present invention, a threshold depth determination device based on the linkage of upstream and downstream waterway water levels is also provided, comprising: a water level data acquisition unit, used to acquire water level data of each hydrological station within the same statistical period, and to standardize the acquired water level data of each hydrological station; a design water level value calculation unit, used to calculate the design water level values ​​of the upstream and downstream waterways under different guarantee rates based on the standardized water level data; and a threshold depth determination unit, used to determine the target threshold depth required at each hub downstream of the continuous cascade waterway based on the design water level value, the design full-load draft of the vessel, and the bottom elevation of the threshold of the downstream hub.

[0014] Optionally, the water level data acquisition unit includes: a hydrological observation data collection module, used to collect hydrological observation data and vessel navigation data of multiple upstream and downstream cascade hubs in a continuous cascade waterway within the same statistical period; and a water level data generation module, used to generate water level data of each hydrological station based on the hydrological observation data and the vessel navigation data.

[0015] Optionally, the design water level calculation unit includes: a data input module, used to input the standardized water level data into a hydrological variable probability distribution model, and fit the water level sequence of each hydrological station through the hydrological variable probability distribution model, wherein the hydrological variable probability distribution model is a pre-trained model used to analyze the frequency distribution characteristics of different hydrological variables and determine the design water level value based on the frequency distribution characteristics; and a design water level calculation module, used to analyze the water level sequence using the hydrological variable probability distribution model and calculate the design water level value under different guarantee rates.

[0016] Optionally, the threshold depth determination device based on the linkage of upstream and downstream water levels further includes: a hydrological feature analysis module, used to analyze the hydrological features in the standardized water level data after standardizing the water level data of each hydrological station; a water level cycle division module, used to divide the annual cycle of the continuous cascade waterway into a high-water period and a low-water period based on the hydrological features; and a water depth seasonal difference determination module, used to analyze the statistical feature values ​​of the water level during the high-water period and the low-water period to obtain the seasonal difference features of the associated threshold depth.

[0017] Optionally, the threshold water depth determination unit includes: a minimum threshold water depth determination module, used to determine the minimum threshold water depth required at the downstream hub based on the design vessel's full-load draft and a preset draft margin value; and a water depth adjustment module, used to adjust the minimum threshold water depth based on the design water level value, the elevation of the downstream hub's threshold bottom, and the seasonal difference characteristics of the associated threshold water depth, to obtain the target threshold water depth required at each hub downstream of the continuous cascade channel.

[0018] Optionally, the water depth adjustment module includes: a water depth adjustment range acquisition submodule, used to acquire a pre-set downstream hub threshold water depth increase threshold and a water depth adjustment range that meets the tonnage requirements of navigable vessels; and a water depth adjustment submodule, used to adjust the minimum threshold water depth based on the downstream hub threshold water depth increase threshold, the water depth adjustment range that meets the tonnage requirements of navigable vessels, the design water level, the elevation of the bottom of the downstream hub threshold, and the seasonal difference characteristics of the associated threshold water depth, to obtain the target threshold water depth required at each hub downstream of the continuous cascade channel.

[0019] Optionally, the threshold depth determination device based on the linkage of upstream and downstream channel water levels further includes: a depth matching unit, used to analyze whether the target threshold depth of each hub downstream of the continuous cascade channel matches the threshold depth of the shipping mainline lock during the high-water season after determining the required target threshold depth based on the design water level, the design full-load draft of the vessel, and the bottom elevation of the downstream hub threshold; and a threshold depth adjustment unit, used to dynamically adjust the target threshold depth in combination with a predetermined depth adjustment range and applicable conditions when the analysis results indicate that the target threshold depth of each hub downstream of the continuous cascade channel does not match the threshold depth of the shipping mainline lock during the high-water season. The applicable conditions include: draft depth adaptation conditions for vessels of different tonnages.

[0020] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to execute any of the above-mentioned threshold depth determination method based on upstream and downstream channel water level linkage.

[0021] According to another aspect of the present invention, an electronic device is also provided, including one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors cause the one or more processors to implement the threshold water depth determination method based on upstream and downstream channel water level linkage as described above.

[0022] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps of the threshold water depth determination method based on upstream and downstream channel water level linkage as described in any one of the above embodiments.

[0023] In this disclosure, water level data of each hydrological station within the same statistical period are obtained and the obtained water level data of each hydrological station are standardized; based on the standardized water level data, the design water level values ​​of the upstream and downstream channels under different guarantee rates are calculated; based on the design water level values, the design full-load draft of the vessel and the sill bottom elevation of the downstream hub, the target sill depth required at each hub in the downstream of the continuous cascade channel is determined.

[0024] In this disclosure, by analyzing upstream and downstream water level data in a continuous cascade waterway, the design water level values ​​under different guarantee rates can be calculated. Then, based on the design water level values, the design full-load draft of the vessel, and the sill bottom elevation of the downstream hub, the target sill depth required at each hub in the downstream of the continuous cascade waterway can be determined. This achieves coordinated optimization of sill depth among multiple hubs, avoids navigation bottlenecks caused by mismatched sill depths, and can adapt to changes in waterway water level. This solves the technical problem in related technologies where inland waterway design only focuses on the sill depth of a single lock, resulting in low flexibility and an inability to adapt to changes in waterway water level. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0026] Figure 1 This is a flowchart of an optional threshold water depth determination method based on the linkage of upstream and downstream water levels according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of an optional threshold water depth determination device based on the linkage of upstream and downstream water levels according to an embodiment of the present invention.

[0028] Figure 3This is a hardware structure block diagram of an electronic device (or mobile device) based on a threshold water depth determination method according to an embodiment of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] To facilitate understanding of the present invention by those skilled in the art, some terms or nouns involved in the various embodiments of the present invention are explained below:

[0032] Locks are hydraulic engineering facilities in inland waterways and canals that allow ships to safely transition between channels with different water levels by regulating water level differences.

[0033] Threshold water depth is the minimum water depth required to ensure the safety of vessels when passing through locks, preventing them from hitting the bottom and ensuring efficient navigation.

[0034] The flood season refers to the period of year when river levels are high and water volume is abundant. During this period, hydrological conditions have a particularly significant impact on lock design and navigation capacity.

[0035] The dry season, as opposed to the wet season, refers to a period when river levels are low and water volume is low.

[0036] The water level guarantee rate curve is used to describe the water level at a specific guarantee rate (e.g., 80%, 50%, 30%), showing the long-term trend and fluctuation range of the water level.

[0037] The P-III type curve, also known as the Pearson Type III Distribution Curve, is a probability distribution model used to describe hydrological variables.

[0038] Waterway upgrading refers to the modification or expansion of existing waterways to improve navigation capacity, accommodate larger vessels, or optimize navigation efficiency. Waterway upgrading involves adjusting the width and depth of the waterway and the structure of related hydraulic engineering facilities.

[0039] It should be noted that the threshold water depth determination method and apparatus based on the linkage of upstream and downstream water levels in this disclosure can be used in the field of inland waterway transportation technology when determining the threshold water depth based on the upstream and downstream water levels, and can also be used in any field other than the field of inland waterway transportation technology when determining the threshold water depth based on the upstream and downstream water levels. This disclosure does not limit the application field of the threshold water depth determination method and apparatus based on the linkage of upstream and downstream water levels.

[0040] It should be noted that the information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, and displayed data) collected in this public disclosure are information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, storage, use, processing, transmission, provision, disclosure, and application of related data all comply with the relevant laws, regulations, and standards of the relevant regions, necessary confidentiality measures have been taken, and they do not violate public order and good morals. Corresponding operation entry points are provided for users to choose to authorize or refuse. For example, this system has interfaces with relevant users or organizations. Before obtaining relevant information, a request to obtain the information needs to be sent to the aforementioned user or organization through the interface, and the relevant information is obtained only after receiving consent from the aforementioned user or organization.

[0041] It should be noted that in this disclosure, customer information is collected and analyzed, and users are provided with corresponding operation entry points to choose whether to agree to or reject the automated decision results; if the user chooses to reject, the process will proceed to the expert decision-making process.

[0042] The following embodiments of the present invention can be applied to various systems / applications / equipment for determining threshold depth based on the linkage of upstream and downstream waterway water levels. The present invention is applicable to inland waterway engineering scenarios, water transport planning and management scenarios, particularly in the design and operation of locks in continuous cascade waterways. Specifically, when the waterway network includes multiple interconnected hydraulic hubs, such as cascade locks and canalized waterways, and the hydrological conditions of these waterways vary significantly with the seasons, the present invention can play a crucial role.

[0043] This invention analyzes the interaction between upstream and downstream water levels in a continuous cascade waterway to achieve coordinated optimization of threshold depth among multiple hubs, avoiding navigation bottlenecks caused by mismatched threshold depths. Furthermore, considering the significant water level changes during high and low water seasons, this invention can dynamically adjust threshold depths to ensure efficient and safe navigation under different seasonal conditions.

[0044] While ensuring navigation safety, this invention achieves efficient resource utilization through refined design, helping to control engineering investment and operating costs and avoid unnecessary resource waste. Furthermore, this invention proposes a differentiated threshold depth design strategy based on specific hydrological conditions and navigation requirements of the waterway, adapting to the characteristics of different waterways and improving the accuracy and applicability of the design.

[0045] The present invention will now be described in detail with reference to various embodiments.

[0046] Example 1

[0047] According to an embodiment of the present invention, an embodiment of a threshold water depth determination method based on the linkage of upstream and downstream channel water levels is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0048] Figure 1 This is a flowchart of an optional threshold water depth determination method based on upstream and downstream channel water level linkage according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0049] Step S101: Obtain water level data of each hydrological station within the same statistical period, and standardize the obtained water level data of each hydrological station.

[0050] Optionally, the step of obtaining water level data of each hydrological station within the same statistical period includes: collecting hydrological observation data and vessel navigation data of multiple upstream and downstream cascade hubs in a continuous cascade waterway within the same statistical period; and generating water level data of each hydrological station based on the hydrological observation data and vessel navigation data.

[0051] In this embodiment, step S101 first involves obtaining water level data from each hydrological station within the same statistical period. This is not limited to directly collecting existing water level measurement records, but may also include generating the required water level data from hydrological observation data and ship navigation data from multiple upstream and downstream cascade hubs.

[0052] The hydrological observation data may include, but is not limited to: 1. Daily water level data: covering the water level height of each cascade hub in the upstream and downstream waterways at a specific point in time, including but not limited to the daily highest water level, lowest water level, and average water level. 2. Flow data: recording the volumetric flow rate of water in the waterway, usually in cubic meters per second (m³ / s). Flow data reflects the flow velocity and total volume of water within a specific time period. 3. Water level guarantee rate curve data: calculating and generating design water level values ​​under different guarantee rates (such as 80%, 50%, and 30%) based on historical observation data.

[0053] The navigation data may include, but is not limited to: 1. Vessel tonnage: Collecting tonnage information of passing vessels. Different tonnage vessels have different water depth requirements, directly affecting the design standards of the sill depth. 2. Vessel draft: Draft refers to the distance from the waterline to the hull when the vessel is fully loaded, and is the minimum water depth required to ensure safe passage. 3. Navigation frequency: Recording the number of vessels passing through each tier of navigable choke points within a certain period helps assess the navigation demand of the channel, identify navigation bottlenecks, and provide a basis for adjusting the sill depth. 4. Navigation time: Recording the specific time of vessel passage through each tier, including the distribution of navigation time in different seasons, helps analyze the impact of seasonal water level changes on navigation.

[0054] After acquiring the water level data from each hydrological station, standardization is performed. Standardization helps eliminate systematic errors caused by different observation methods and reference surfaces, ensuring the comparability of data between stations. Optionally, this embodiment can use a P-III type frequency curve to fit and organize the water level sequences of each station, and then calculate the design water level value under the same guarantee rate. This not only helps identify outliers in the water level data but also ensures the accuracy and consistency of subsequent analysis processes. After standardization, the appropriate threshold water depth can be accurately assessed based on a more consistent data foundation, avoiding unreasonable design or analysis deviations caused by data errors. In addition, standardization also includes time series adjustment of hydrological data to reflect the periodicity and seasonality of water level changes. Thus, this embodiment can not only capture short-term water level fluctuations but also reveal long-term water level trends, providing solid data support for the dynamic adjustment of the threshold water depth.

[0055] Step S102: Based on the standardized water level data, calculate the design water level values ​​of the upstream and downstream channels under different guarantee rates.

[0056] Optionally, the step of calculating the design water level values ​​of the upstream and downstream waterways under different guarantee rates based on the standardized water level data includes: inputting the standardized water level data into a hydrological variable probability distribution model; fitting the water level sequence of each hydrological station through the hydrological variable probability distribution model, wherein the hydrological variable probability distribution model is a pre-trained model used to analyze the frequency distribution characteristics of different hydrological variables and determine the design water level value based on the frequency distribution characteristics; and using the hydrological variable probability distribution model to analyze the water level sequence and calculate the design water level values ​​under different guarantee rates.

[0057] The probability distribution model for hydrological variables can be selected independently. For example, the P-III type model curve can be selected as the probability distribution model for hydrological variables.

[0058] In this embodiment, step S102 can calculate the design water level values ​​of the upstream and downstream waterways under different guarantee rates based on the standardized water level data. By inputting the standardized water level data into the hydrological variable probability distribution model, the water level sequence distribution of each hydrological station can be fitted, and then the design water level value under a specific guarantee rate (such as 80%, 50%, 30%) can be calculated.

[0059] This embodiment employs a pre-trained hydrological variable probability distribution model. By learning from a large amount of historical hydrological data, it can accurately capture the frequency distribution patterns of water level changes. Standardized water level data is used as model input, and the model outputs design water level values ​​under different guarantee rates based on the frequency distribution characteristics of the water level sequence. This method helps improve the accuracy of calculation results and provides a scientific basis for the optimized design of threshold depth. In specific operation, this embodiment, through the calculation of the hydrological variable probability distribution model, can clearly depict the statistical characteristics of water levels during the high-water and low-water seasons. Unlike previous methods that might rely solely on experience or a single data source, this embodiment, through model analysis, can examine water level changes from a global perspective, helping designers to make more comprehensive threshold depth plans. The water level distribution information obtained through model analysis allows designers to better quantify the impact of water level changes between various hubs, thereby formulating threshold depth design criteria that both conform to the actual operation of the waterway and effectively cope with seasonal water level fluctuations.

[0060] It should be noted that, in this embodiment, the guarantee rate calculation can employ a P-III type curve or an empirical frequency formula, for example, using the following formula: Calculation formula P = m / (n+1) × 100%, where P is the guarantee rate, m is the sequence number, and n is the series length. Hydrological data from the same statistical period are selected, and the water level data for each station are standardized to eliminate systematic errors caused by different observation methods and reference surfaces. The water level sequence for each station is fitted using a P-III type frequency curve to calculate the design water level value under the same guarantee rate.

[0061] For example, the downstream hub's 80% guarantee rate water levels (m) are provided as h80%1, h80%2, h80%3, h80%4, and h80%5, respectively.

[0062] The 50% guarantee rate water levels (m) are h50%1, h50%2, h50%3, h50%4, and h50%5, respectively.

[0063] The 30% guarantee rate water levels (m) are h30%1, h30%2, h30%3, h30%4, and h30%5, respectively.

[0064] The elevations of the threshold bottom of the downstream hub are z1, z2, z3, z4, and z5, respectively.

[0065] The formula for calculating the threshold water depth at different downstream guarantee rates is: H = hn% - Zn - ..., where H is the threshold water depth (m), hn% is the water level at different guarantee rates, and Zn is the elevation of the threshold bottom at different downstream hubs. Therefore, the calculated threshold water depth at the hub is H_threshold = max((hn% - ZN); (1.6 × T)), where T is the design draft of the vessel at full load (m).

[0066] Optionally, after standardizing the water level data of each hydrological station, the method further includes: analyzing the hydrological characteristics in the standardized water level data; dividing the annual cycle of the continuous cascade waterway into a high-water season and a low-water season based on the hydrological characteristics; and analyzing the statistical characteristic values ​​of water levels during the high-water season and the low-water season to obtain the seasonal difference characteristics of the associated threshold water depth.

[0067] This embodiment utilizes various statistical analysis methods, such as time series analysis, trend analysis, and anomaly detection, to uncover the inherent hydrological characteristics of standardized water level data. This helps identify long-term water level change trends, seasonal fluctuation patterns, and potential abnormal water level phenomena. Using the analyzed hydrological characteristics, this embodiment can scientifically divide the year into a high-water season and a low-water season. This division can be based on the seasonal variation characteristics of water levels; the high-water season corresponds to periods of high water levels and abundant water volume, while the low-water season is characterized by low water levels and reduced water volume. After identifying the high-water and low-water seasons, this embodiment further analyzes the statistical characteristics of water levels within these two periods, such as average water level, extreme water levels, and water level change rates. Through comparative analysis, the differences in threshold depth between different seasons can be obtained. This provides crucial information for optimizing threshold depth design and ensuring safe and efficient navigation for vessels throughout the year.

[0068] Furthermore, in analyzing the statistical characteristics of water levels during the wet and dry seasons to obtain the seasonal differences in the threshold depth, this embodiment first collects water level data from historical hydrological observations for both wet and dry seasons, including but not limited to parameters such as daily average water level, highest water level, lowest water level, and rate of water level change. Subsequently, the collected water level data is analyzed in depth to calculate statistical characteristics of the water levels. These include, but are not limited to, the average water level, standard deviation, extreme value distribution probability, and the trend of water level changes. These characteristics can intuitively reflect the dynamic characteristics of seasonal water levels, helping to understand the typical behavior and fluctuation range of water levels during the wet and dry seasons. This embodiment further explores the correlation between threshold depth and seasonal water level changes. By combining the statistical characteristics of water levels with threshold depth design, it analyzes the safety margin and economy of threshold depth under different water level conditions to reveal the specific impact of seasonality on threshold depth design. For example, during the wet season, a smaller draft margin may be needed to maximize the navigation capacity of the channel, while during the dry season, a higher draft margin may be needed to ensure ship safety. Finally, based on the above analysis, this embodiment extracts the differences in threshold water depth as a function of seasonal water level changes. These characteristics describe the different requirements for threshold water depth design during the wet and dry seasons, including but not limited to the minimum and optimal values ​​of the required water depth and the adjustment range.

[0069] Step S103: Based on the design water level, the design full-load draft of the vessel, and the sill bottom elevation of the downstream hub, determine the target sill depth required at each hub in the downstream of the continuous cascade waterway.

[0070] In this embodiment, step S103 focuses on determining the target threshold water depth required at each hub downstream of the continuous cascade waterway based on the design water level, the design full-load draft of the vessel, and the bottom elevation of the sill of the downstream hub.

[0071] Optionally, the step of determining the target threshold water depth required at each hub downstream of the continuous cascade waterway based on the design water level, the design full-load draft of the vessel, and the sill bottom elevation of the downstream hub includes: determining the minimum threshold water depth required at the downstream hub based on the design full-load draft of the vessel and the preset draft margin value; and adjusting the minimum threshold water depth based on the seasonal differences in the design water level, the sill bottom elevation of the downstream hub, and the associated threshold water depth to obtain the target threshold water depth required at each hub downstream of the continuous cascade waterway.

[0072] This embodiment first estimates the minimum water depth requirement at the downstream sill based on the designed vessel's full-load draft and a certain draft margin value (e.g., 1.6 times the draft). This initially set minimum sill water depth aims to ensure that the designed vessel can safely pass through the sill under various water level conditions, avoiding the risk of bottoming out or running aground. The selection of the preset draft margin value fully considers the changes in water depth requirements of the vessel under different load conditions, which helps to improve the flexibility and safety of the sill water depth design.

[0073] Based on the initial determination of the minimum threshold depth, this embodiment further incorporates the design water level, the elevation of the downstream hub threshold bottom, and the seasonal differences analyzed earlier. Through comprehensive analysis of these parameters, the initially set minimum threshold depth can be adjusted as necessary to adapt to water level changes in different seasons. For example, during the high-water season, a smaller margin of safety may be required, while during the low-water season, the margin of safety needs to be increased to ensure navigation safety. In this way, this embodiment ultimately determines the target threshold depth at each hub downstream of the continuous cascade waterway, considering both navigation safety and water level differences between the high and low water seasons.

[0074] Optionally, the step of adjusting the minimum threshold depth based on the seasonal differences in the design water level, the bottom elevation of the downstream hub threshold, and the associated threshold depth to obtain the target threshold depth required at each hub in the downstream of the continuous cascade waterway includes: obtaining a pre-set threshold depth increase threshold for the downstream hub and the depth adjustment range that meets the tonnage requirements of navigable vessels; and adjusting the minimum threshold depth based on the threshold depth increase threshold, the depth adjustment range that meets the tonnage requirements of navigable vessels, the design water level, the bottom elevation of the downstream hub threshold, and the seasonal differences in the associated threshold depth to obtain the target threshold depth required at each hub in the downstream of the continuous cascade waterway.

[0075] This embodiment also requires clarifying two important parameters: one is the threshold for raising the sill depth, used to determine whether the sill depth needs to be raised and by how much; the other is the depth adjustment range determined based on the tonnage of the vessels, reflecting the possible changes in the sill depth to meet the navigation needs of vessels of different tonnages. Obtaining these two parameters helps to set reasonable adjustment limits in subsequent adjustments, avoiding overly conservative or aggressive sill depth design, and achieving a balance between cost-effectiveness and navigation safety.

[0076] This embodiment comprehensively considers several key factors when adjusting the threshold depth. First, the threshold depth increase threshold serves as the starting point for adjustment. When the existing minimum threshold depth differs from the design target or seasonal requirements, the threshold depth increase threshold guides the minimum requirement for threshold depth increase. Second, the depth adjustment range meets the tonnage requirements of navigable vessels, ensuring that the threshold depth can accommodate the safe passage of vessels of different tonnages during adjustment, while avoiding resource waste caused by over-design. The design water level and the threshold bottom elevation of downstream hubs serve as the benchmarks for threshold depth adjustment. They, combined with seasonal differences, provide the minimum safety margin that the threshold depth must meet under different water level conditions. Based on these comprehensive factors, this embodiment can reasonably adjust the minimum threshold depth, ensuring that the adjusted threshold depth meets both the navigation requirements of designed vessels and adapts to seasonal changes in water level, thereby deriving the target threshold depth required at each hub downstream of the continuous tiered waterway.

[0077] Through the above steps, water level data from various hydrological stations within the same statistical period can be obtained, and the obtained water level data from each hydrological station can be standardized. Based on the standardized water level data, the design water level values ​​of the upstream and downstream channels under different guarantee rates are calculated. Based on the design water level values, the design full-load draft of vessels, and the sill bottom elevation of downstream hubs, the target sill depth required at each hub in the downstream of the continuous cascade channel is determined. In this embodiment, by analyzing the upstream and downstream water level data in the continuous cascade channel, the design water level values ​​under different guarantee rates can be calculated. Then, based on the design water level values, the design full-load draft of vessels, and the sill bottom elevation of downstream hubs, the target sill depth required at each hub in the downstream of the continuous cascade channel can be determined. This achieves coordinated optimization of sill depth among multiple hubs, avoids navigation bottlenecks caused by mismatched sill depths, and can adapt to changes in channel water level. This solves the technical problem in related technologies where inland waterway design only focuses on the sill depth of a single lock, resulting in low flexibility and an inability to adapt to changes in channel water level.

[0078] Optionally, after determining the target threshold water depth required at each hub downstream of the continuous cascade waterway based on the design water level, the design full-load draft of the vessel, and the sill bottom elevation of the downstream hub, the method further includes: analyzing whether the target threshold water depth of each hub downstream of the continuous cascade waterway matches the sill water depth of the main shipping line lock during the high-water season; if the analysis results indicate that the target threshold water depth of each hub downstream of the continuous cascade waterway does not match the sill water depth of the main shipping line lock during the high-water season, the target threshold water depth is dynamically adjusted in combination with the predetermined water depth adjustment range and applicable conditions, wherein the applicable conditions include: the draft depth adaptation conditions of vessels of different tonnages.

[0079] This embodiment compares the target sill depths of downstream hubs to check whether these depth values ​​are consistent with the lock sill depths of the main shipping line during the high-water season. This helps identify potential navigation bottlenecks or resource waste, ensuring that the freedom of navigation for vessels during the high-water season is not limited by the sill depth of any particular hub. The matching check process may include comparing the design depth with the actual measured depth, analyzing the consistency and potential differences between the two, and assessing the impact of these differences on navigation capacity.

[0080] If a mismatch is found between the target threshold depth and the threshold depth of the main shipping channel lock during the high-water season, this embodiment will immediately activate the dynamic adjustment mechanism for the threshold depth. The adjustment process comprehensively considers the predetermined depth adjustment range and the draft compatibility conditions of vessels of different tonnages, ensuring that the adjusted threshold depth meets the safe navigation requirements of large-tonnage vessels while also allowing for efficient passage of smaller vessels. Through dynamic adjustment, this embodiment can flexibly respond to water level rises during the high-water season, preventing excessively high threshold depths from hindering navigation or excessively low threshold depths from causing safety risks. This helps downstream hubs of continuous cascade waterways to optimize threshold depths in a timely manner according to seasonal changes, maintaining stable and efficient navigation capacity.

[0081] The following describes in detail another optional implementation method.

[0082] The present invention provides a method for determining threshold depth based on upstream and downstream channel water levels. This method can comprehensively consider the water level linkage relationship of multiple hubs in a continuous cascade channel, achieve coordinated optimization of threshold depth, and accurately reflect the impact of water level changes during the wet and dry seasons on threshold depth, thus solving the navigation bottleneck problem.

[0083] The first step is to collect multi-year hydrological observation data of the target waterway and its downstream cascade hubs, including parameters such as daily water level and flow rate, and calculate the water level guarantee rate curve and flow duration curve for each hydrological station.

[0084] The second step is to analyze the water level correspondence between upstream and downstream hubs under the same guarantee rate, identify the dynamic characteristics of water level changes during the wet and dry seasons, calculate the seasonal differences in threshold water depth, analyze the response relationship between water level, flow rate, and threshold water depth, and quantify the impact of water level changes on threshold water depth.

[0085] It should be noted that, for the calculation of the guarantee rate, the embodiment of this invention adopts the P-III type curve or empirical frequency formula, and the calculation formula is P=m / (n+1)×100%, where P is the guarantee rate, m is the serial number, and n is the series length. Furthermore, hydrological data from the same statistical period are selected, and the water level data of each station are standardized to eliminate systematic errors caused by differences in observation methods and reference surfaces.

[0086] The water level sequences of each station were fitted using P-III type frequency curves to calculate the design water level values ​​under the same guarantee rate. Specifically, the calculation process includes:

[0087] The downstream hub's 80% guarantee rate water levels (m) are h80%1, h80%2, h80%3, h80%4, and h80%5, respectively.

[0088] The 50% guarantee rate water levels (m) are h50%1, h50%2, h50%3, h50%4, and h50%5, respectively.

[0089] The 30% guarantee rate water levels (m) are h30%1, h30%2, h30%3, h30%4, and h30%5, respectively.

[0090] The elevations of the threshold bottom of the downstream hub are z1, z2, z3, z4, and z5, respectively.

[0091] The formula for calculating the threshold water depth for different guarantee rates downstream is: H threshold = hn% - Zn - ..., where H is the threshold water depth (m), hn% is the water level for different guarantee rates, and Zn is the bottom elevation of the threshold for different downstream hubs.

[0092] Finally, the threshold water depth at the hub is calculated as H_threshold = max((hn%-ZN);(1.6×T)).T is the design full-load draft of the ship (m).

[0093] The third step is to determine the minimum threshold depth required based on the navigation tonnage of the waterway plan. Under the premise of ensuring navigation safety, analyze the dynamic increase of the waterway depth during the high-water season, propose a dynamic increase scheme for the threshold depth, including the basic value, adjustment range and applicable conditions, and determine the target threshold depth applicable to different downstream hubs.

[0094] Optionally, when calculating the minimum threshold depth required for a ship to pass through the lock, the minimum threshold depth can be determined according to the navigation tonnage of the planned waterway and in accordance with the requirements of the "General Design Code for Locks" (JTJ305-2001). The lock threshold should meet the requirements of the maximum draft plus the margin of the designed ship or fleet when fully loaded. It can be calculated using the formula H≥1.6×T, where H represents the minimum threshold depth (unit: meters) and T represents the draft of the designed ship when fully loaded (unit: meters).

[0095] Furthermore, in determining the basic value and adjustment range of the threshold depth increase in this embodiment, the conditions for dynamic increase of the threshold depth may include the downstream hub threshold depth increase exceeding a threshold (e.g., the threshold is set to 0.5m), the tonnage of navigable vessels being upgraded (e.g., 1000-tonnage → 3000-tonnage), and the continuous occurrence of seasonal navigation bottlenecks.

[0096] Furthermore, this implementation method can divide the year into a high-water season and a low-water season based on hydrological characteristics. This embodiment can calculate the statistical characteristic values ​​of water level for each period and analyze the seasonal differences in threshold depth. Based on the standardized water level data, the actual threshold depth of the locks at various hubs along the shipping main line and waterway is statistically analyzed to determine whether the threshold depth of each hub basically matches the threshold depth of the main line. At the same time, it is calculated whether there is a mismatch between the threshold depth of the locks on the shipping main line during the high-water season and the threshold depth at different hub locations. If there is a mismatch, the threshold depth value is adjusted.

[0097] By comprehensively considering the design water level, the sill bottom elevation of the downstream hub, the design full-load draft of the vessel, and the seasonal water level change characteristics, the sill depth of each hub downstream of the continuous cascade waterway can be calculated. This avoids the problem of mismatched sill depths in traditional designs and improves the navigation efficiency of the waterway.

[0098] Furthermore, this implementation method analyzes the statistical characteristics of water levels during the high-water and low-water seasons to determine the seasonal differences in threshold depth. This allows for dynamic adjustment of the threshold depth under varying water levels, ensuring the stability and safety of navigation throughout the year and reducing seasonal navigation bottlenecks. By meticulous design and timely adjustments while meeting navigation requirements, this method effectively reduces engineering investment and operating costs, avoids resource waste due to improper threshold depth settings, and maximizes cost-effectiveness.

[0099] This implementation method can adapt to the needs of future waterway upgrades and changes in ship tonnage. By analyzing the adaptation conditions of different tonnage ships' drafts, it can flexibly adjust the threshold depth to ensure that the navigation capacity after the waterway upgrade does not decrease but increases, and has good scalability and market adaptability.

[0100] The following is a detailed description with reference to another embodiment.

[0101] Example 2

[0102] The threshold water depth determination device based on the linkage of upstream and downstream water levels provided in this embodiment includes multiple implementation units, each of which corresponds to a specific implementation step in the above embodiment one.

[0103] Figure 2 This is a schematic diagram of an optional threshold depth determination device based on upstream and downstream channel water level linkage according to an embodiment of the present invention, as shown below. Figure 2 As shown, the threshold water depth determination device based on the linkage of upstream and downstream water levels may include: a water level data acquisition unit 21, a design water level value calculation unit 22, and a threshold water depth determination unit 23.

[0104] The water level data acquisition unit 21 is used to acquire water level data of each hydrological station within the same statistical period and to standardize the acquired water level data of each hydrological station.

[0105] Design water level calculation unit 22 is used to calculate the design water level values ​​of upstream and downstream waterways under different guarantee rates based on standardized water level data.

[0106] Threshold depth determination unit 23 is used to determine the target threshold depth required at each hub downstream of the continuous cascade waterway based on the design water level, the design full-load draft of the vessel, and the sill bottom elevation of the downstream hub.

[0107] The threshold depth determination device based on the linkage of upstream and downstream water levels can acquire water level data of each hydrological station within the same statistical period through the water level data acquisition unit 21, and standardize the acquired water level data of each hydrological station. Based on the standardized water level data, the design water level value calculation unit 22 calculates the design water level value of the upstream and downstream waterways under different guarantee rates. Based on the design water level value, the design full-load draft of the vessel, and the bottom elevation of the threshold of the downstream hub, the threshold depth determination unit 23 determines the target threshold depth required at each hub in the downstream of the continuous cascade waterway. In this embodiment, by analyzing the upstream and downstream water level data in a continuous cascade waterway, the design water level values ​​under different guarantee rates can be calculated. Then, based on the design water level values, the design full-load draft of the vessel, and the sill bottom elevation of the downstream hub, the target sill depth required at each hub in the downstream of the continuous cascade waterway can be determined. This achieves coordinated optimization of sill depth among multiple hubs, avoids navigation bottlenecks caused by mismatched sill depths, and can adapt to changes in waterway water level. This solves the technical problem in related technologies where inland waterway design only focuses on the sill depth of a single lock, resulting in low flexibility and an inability to adapt to changes in waterway water level.

[0108] Optionally, the water level data acquisition unit includes: a hydrological observation data collection module, used to collect hydrological observation data and vessel navigation data of multiple upstream and downstream cascade hubs in a continuous cascade waterway within the same statistical period; and a water level data generation module, used to generate water level data for each hydrological station based on the hydrological observation data and vessel navigation data.

[0109] Optionally, the design water level calculation unit includes: a data input module, used to input standardized water level data into a hydrological variable probability distribution model, and fit the water level sequence of each hydrological station through the hydrological variable probability distribution model, wherein the hydrological variable probability distribution model is a pre-trained model used to analyze the frequency distribution characteristics of different hydrological variables and determine the design water level value based on the frequency distribution characteristics; and a design water level calculation module, used to analyze the water level sequence using the hydrological variable probability distribution model and calculate the design water level value under different guarantee rates.

[0110] Optionally, the threshold water depth determination device based on the linkage of upstream and downstream water levels further includes: a hydrological feature analysis module, used to analyze the hydrological features in the standardized water level data after standardizing the water level data of each hydrological station; a water level cycle division module, used to divide the annual cycle of the continuous cascade waterway into a high-water period and a low-water period based on hydrological features; and a water depth seasonal difference determination module, used to analyze the statistical feature values ​​of water levels during the high-water period and the low-water period to obtain the seasonal difference features of the associated threshold water depth.

[0111] Optionally, the threshold depth determination unit includes: a minimum threshold depth determination module, used to determine the minimum threshold depth required at the downstream hub based on the design vessel's full-load draft and a preset draft margin value; and a depth adjustment module, used to adjust the minimum threshold depth based on the design water level, the elevation of the downstream hub's threshold bottom, and the seasonal differences in the associated threshold depth, to obtain the target threshold depth required at each hub downstream of the continuous cascade channel.

[0112] Optionally, the water depth adjustment module includes: a water depth adjustment range acquisition submodule, used to acquire the pre-set downstream hub threshold water depth increase threshold and the water depth adjustment range that meets the tonnage requirements of navigable vessels; and a water depth adjustment submodule, used to adjust the minimum threshold water depth based on the downstream hub threshold water depth increase threshold, the water depth adjustment range that meets the tonnage requirements of navigable vessels, the design water level, the elevation of the bottom of the downstream hub threshold, and the seasonal differences in the associated threshold water depth, to obtain the target threshold water depth required at each hub downstream of the continuous cascade channel.

[0113] Optionally, the threshold depth determination device based on the linkage of upstream and downstream channel water levels further includes: a depth matching unit, used to analyze whether the target threshold depth of each hub downstream of the continuous cascade channel matches the threshold depth of the shipping mainline lock during the high-water season after determining the required target threshold depth based on the design water level, the design full-load draft of the vessel, and the bottom elevation of the downstream hub threshold; and a threshold depth adjustment unit, used to dynamically adjust the target threshold depth in combination with a predetermined depth adjustment range and applicable conditions when the analysis results indicate that the target threshold depth of each hub downstream of the continuous cascade channel does not match the threshold depth of the shipping mainline lock during the high-water season. The applicable conditions include: the draft depth adaptation conditions of vessels of different tonnages.

[0114] The threshold water depth determination device based on the linkage of upstream and downstream water levels can also include a processor and a memory. The water level data acquisition unit 21, the design water level value calculation unit 22, the threshold water depth determination unit 23, etc. are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize the corresponding functions.

[0115] The aforementioned processor contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured, and the appropriate threshold depth can be determined based on the upstream and downstream channel water levels by adjusting kernel parameters.

[0116] The aforementioned memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0117] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored computer program, wherein, when the computer program is running, it controls the device where the computer-readable storage medium is located to execute any one of the above embodiments of the threshold water depth determination method based on the linkage of upstream and downstream water levels.

[0118] According to another aspect of the present invention, an electronic device is also provided, including one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors cause the one or more processors to implement the threshold water depth determination method based on upstream and downstream channel water level linkage as described in any of the embodiments of the present invention.

[0119] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the threshold water depth determination method based on upstream and downstream channel water level linkage described in various embodiments of this application.

[0120] This application also provides a computer program product, including a non-volatile computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the threshold water depth determination method based on upstream and downstream channel water level linkage described in various embodiments of this application.

[0121] Figure 3 This is a hardware structure block diagram of an electronic device (or mobile device) according to an embodiment of the present invention, which is a threshold water depth determination method based on the linkage of upstream and downstream water levels. Figure 3 As shown, an electronic device may include one or more ( Figure 3The processor (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and memory 304 for storing data are illustrated using 302a, 302b, ..., 302n. In addition, it may include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, a keyboard, a power supply, and / or a camera. Those skilled in the art will understand that... Figure 3 The structure shown is for illustrative purposes only and does not limit the structure of the electronic device described above. For example, the electronic device may also include components that are more... Figure 3 The more or fewer components shown, or having the same Figure 3 The different configurations shown.

[0122] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0123] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0124] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0125] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0126] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0127] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0128] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for determining the threshold water depth based on the linkage of upstream and downstream channel water levels, characterized in that, include: Obtain water level data from each hydrological station within the same statistical period, and standardize the obtained water level data from each hydrological station. Based on the standardized water level data, the design water level values ​​of the upstream and downstream waterways under different guarantee rates are calculated. Based on the design water level, the design vessel's full-load draft, and the sill bottom elevation of the downstream hub, the target sill depth required at each hub in the downstream of the continuous cascade waterway is determined.

2. The method for determining the threshold water depth according to claim 1, characterized in that, The steps for obtaining water level data from various hydrological stations within the same statistical period include: Collect hydrological observation data and vessel navigation data from multiple cascade hubs upstream and downstream of continuous cascade waterways within the same statistical period; Based on the hydrological observation data and the ship navigation data, water level data for each hydrological station is generated.

3. The method for determining the threshold water depth according to claim 1, characterized in that, The steps for calculating the design water level values ​​of upstream and downstream channels under different guarantee rates based on the standardized water level data include: The standardized water level data is input into the hydrological variable probability distribution model, and the water level sequence of each hydrological station is fitted by the hydrological variable probability distribution model. The hydrological variable probability distribution model is a pre-trained model used to analyze the frequency distribution characteristics of different hydrological variables and to determine the design water level value based on the frequency distribution characteristics. The water level sequence is analyzed using the hydrological variable probability distribution model to calculate the design water level values ​​under different guarantee rates.

4. The method for determining the threshold water depth according to claim 1, characterized in that, After standardizing the water level data from each hydrological station, the process also includes: Analyze the hydrological characteristics in the standardized water level data; Based on the aforementioned hydrological characteristics, the annual cycle of the continuous cascade waterway is divided into a high-water season and a low-water season. By analyzing the statistical characteristics of water levels during the wet and dry seasons, the seasonal differences in the associated threshold water depth are obtained.

5. The method for determining the threshold water depth according to claim 4, characterized in that, Based on the design water level, the design vessel's full-load draft, and the sill bottom elevation of the downstream hub, the steps for determining the required target sill depth at each hub downstream of the continuous cascade waterway include: Based on the designed full-load draft of the vessel and the preset draft margin value, determine the minimum threshold water depth required at the downstream hub. Based on the seasonal differences in the design water level, the sill bottom elevation of the downstream hub, and the associated sill depth, the minimum sill depth is adjusted to obtain the target sill depth required at each hub in the downstream of the continuous cascade waterway.

6. The method for determining the threshold water depth according to claim 5, characterized in that, The step of adjusting the minimum threshold depth based on the design water level, the downstream hub threshold bottom elevation, and the seasonal differences in the associated threshold depth to obtain the target threshold depth required at each hub downstream of the continuous cascade waterway includes: Obtain the pre-set downstream hub threshold water depth increase threshold and the water depth adjustment range that meets the tonnage requirements of navigable vessels; Based on the downstream hub threshold depth increase threshold, the depth adjustment range that meets the tonnage requirements of navigable vessels, the design water level, the elevation of the bottom of the downstream hub threshold, and the seasonal differences in the associated threshold depth, the minimum threshold depth is adjusted to obtain the target threshold depth required at each hub in the downstream of the continuous cascade waterway.

7. The method for determining the threshold water depth according to claim 1, characterized in that, After determining the target threshold depth required at each hub downstream of the continuous cascade waterway based on the design water level, the design vessel's full-load draft, and the sill bottom elevation of the downstream hub, the process also includes: Analyze whether the target threshold water depth of each hub downstream of the continuous cascade waterway matches the threshold water depth of the locks on the main shipping line during the high-water season. If the analysis results indicate that the target threshold water depth of each hub downstream of the continuous cascade waterway does not match the threshold water depth of the shipping mainline lock during the high-water season, the target threshold water depth is dynamically adjusted in combination with the predetermined water depth adjustment range and applicable conditions. The applicable conditions include: the draft depth adaptation conditions of ships of different tonnages.

8. A threshold depth determination device based on upstream and downstream channel water level linkage, characterized in that, include: The water level data acquisition unit is used to acquire water level data from various hydrological stations within the same statistical period and to standardize the acquired water level data from various hydrological stations. The design water level calculation unit is used to calculate the design water level values ​​of the upstream and downstream waterways under different guarantee rates based on the standardized water level data. The threshold depth determination unit is used to determine the target threshold depth required at each hub downstream of the continuous cascade waterway based on the design water level, the design full-load draft of the vessel, and the bottom elevation of the threshold of the downstream hub.

9. An electronic device, characterized in that, It includes one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors cause the one or more processors to implement the threshold water depth determination method based on upstream and downstream channel water level linkage as described in any one of claims 1 to 7.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the threshold water depth determination method based on the linkage of upstream and downstream water levels as described in any one of claims 1 to 7.

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