A reservoir desilting scheduling method and related device under water-sand relationship abnormal condition

Abstract

The application provides a reservoir desilting scheduling method and related device under water-sand relationship abnormal conditions, aiming at the problems of lack of reservoir sediment observation data in the Qinghai-Tibet Plateau, low efficiency of traditional scheduling mode caused by water-sand relationship abnormality (such as increase of sand amount and "zero storage and whole taking"), and realizes the method through the following steps: 1. Based on the flow and air temperature data of the upstream monitoring point, the sand content is calculated by using the formula; 2. The control target of the current deposition amount is determined according to the design deposition allowable value, and the required storage capacity is calculated by combining the desilting ratio formula; 3. The desilting water level is obtained by converting the storage capacity curve, and the desilting starting time is predicted by using the sediment transport time model. The application does not need to rely on online sediment concentration monitoring, can dynamically adapt to the water-sand abnormal conditions caused by climate change, accurately controls the deposition amount, reduces the waste of water resources, and is suitable for the plateau reservoirs with poor sediment data and complex water-sand relationship.

Description

Technical Field

[0001] This invention relates to the field of reservoir sediment discharge scheduling technology, specifically a reservoir sediment discharge scheduling method and related apparatus under conditions of abnormal water-sediment relationship. Background Technology

[0002] Under the general principle of "storing clear water and discharging turbid water," reservoir sediment discharge scheduling generally includes methods such as constant water level sediment discharge, staged sediment discharge, lowering water level sediment discharge, and open discharge sediment discharge (including baseflow flushing and open-air flushing). Constant water level is typically used for a given season or inflow / sediment conditions; when these conditions are met, the water level is maintained at the sediment discharge level for sediment discharge. Staged discharge is an optimization of constant water level sediment discharge, setting multiple water levels for sediment discharge, usually 2-3, and scheduling different water levels for different inflow / sediment conditions (sometimes including pre-accumulation conditions). Open discharge sediment discharge utilizes the flood season to open all dam openings (except for the power plant) for sediment discharge; it has good sediment discharge efficiency but significant power generation losses. Lowering water level sediment discharge is between constant water level sediment discharge and open discharge sediment discharge, discharging sediment by gradually lowering the water level. It is evident that regardless of the method of sediment removal, it is necessary to have a clear understanding of the incoming water and sediment conditions. When the water-sediment relationship is good, it is possible to only understand the incoming water conditions. However, if the water-sediment relationship is poor and precise scheduling is required, it is essential to understand the incoming sediment conditions.

[0003] For the Qinghai-Tibet Plateau, most reservoirs lack reliable sediment monitoring data, and sediment discharge scheduling largely relies on inflow conditions or the scheduling methods given in the design phase. Furthermore, with the intensification of extreme weather in recent years, the water-sediment relationship has become distorted. On the one hand, sediment volume continues to increase, often differing significantly from the design conditions; on the other hand, extreme sediment conditions such as "zero-sum storage followed by large-scale extraction" are frequent, indicating asynchronous or even disparate water and sediment sources, exhibiting a nonlinear relationship. Simply relying on inflow conditions or using the original design scheduling methods often leads to water waste or increased sedimentation. Therefore, it is necessary to study a flexible and precise sediment discharge scheduling method under conditions of scarce sediment data. Summary of the Invention

[0004] This invention provides a reservoir sediment discharge scheduling method and related device under abnormal water-sediment relationship conditions, which can greatly reduce water resource consumption and cost in the sediment discharge process.

[0005] A reservoir sediment discharge scheduling device under abnormal water-sediment relationship conditions includes:

[0006] Data monitoring module: used to collect the daily flow Q at monitoring points upstream of the reservoir. i Daily average temperature Ti and outflow O i ;

[0007] Sediment concentration calculation module: The input end is connected to the data monitoring module and is configured to calculate the sediment concentration based on the daily flow Q at the upstream monitoring point of the reservoir. iCalculation of sediment content (SSC) from daily average temperature (Ti) i ;

[0008] Module for determining sediment retention capacity: Configured to determine the allowable sedimentation value C from the reservoir design data. max Determine the target for controlling siltation volume C. Di ;

[0009] Reservoir capacity calculation module: The input terminals are connected to the sediment concentration calculation module and the sediment retention capacity determination module, respectively, and are configured to calculate based on the incoming sediment concentration SSC. i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i :

[0010] The sediment concentration and water level determination module: its input end is connected to the reservoir capacity calculation module, and it is configured to determine the water level based on the reservoir capacity curve (C). i -Z i (Relationship) The required reservoir capacity C for sediment discharge will be calculated. i Converted to sediment discharge level Z i ;

[0011] Transport time prediction module: The input end is connected to the data monitoring module and the sediment concentration calculation module, and is configured to predict transport time based on the sediment concentration SSC. i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i Predict the time t for sediment transport to the front of the dam to determine the timing for initiating sediment discharge;

[0012] Dispatch and control module: The input terminals are connected to the water level determination module and the transport time prediction module respectively. It is configured to output a sediment discharge dispatching command according to the sediment discharge water level Zi and the sediment discharge start time, control the reservoir to adjust the water level to Zi and start sediment discharge according to the determined sediment discharge start time.

[0013] Furthermore, the daily flow Q at the upstream monitoring point of the reservoir... i Calculation of sediment content (SSC) from daily average temperature (Ti) i Specifically, it includes:

[0014] SSC i =0.002A i Q i 0.211Ti+0.67 +A i (0.099Q) Ii +0.059)*Q Ii 0.133 +0.002Q Ii (4);

[0015] (5);

[0016] In the formula: A i Q is a geomorphic parameter. i Daily traffic, Q Ii The increase in flow rate on the current day compared to the previous day is calculated by the difference between the current day's flow rate and the previous day's flow rate. Ti is the cumulative average temperature of the current day and the previous 7 days; D is the number of days in a hydrological year; i is the day number in a hydrological year. A hydrological year is calculated from the first day of the month in which the first rise in water occurs in a natural year to the day before the same date in the following year.

[0017] Furthermore, the method based on the sediment content SSC i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i ,include:

[0018] (2);

[0019] C Di =T e ×SSC i ×I i (3);

[0020] In the formula: C i To accommodate the required reservoir capacity for sand removal, m 3 I represents the average annual runoff, in m³. 3 Through daily traffic i Obtained by conversion with time; I i Daily runoff, m 3 It can be converted from the flow rate Q; SSC is the annual average sediment concentration; SSC i This represents the sediment content of the incoming sand on that day, in kg / m³. 3 ;T e The sand-trapping rate is %; C Di The amount of sand interception is expressed in kg.

[0021] Furthermore, the method based on the sediment content SSC i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i The predicted time t for sediment transport to the dam front includes:

[0022] t=f3(SSC) i L, Q i O i (7);

[0023] In the formula: L is the distance from the water and sediment monitoring point to the dam, in km.

[0024] A method for precise sediment discharge scheduling in a reservoir under asynchronous water and sediment conditions includes the following steps:

[0025] Daily flow Q at upstream monitoring points of the reservoir i Daily average temperature Ti and outflow O i ;

[0026] Based on the daily flow Q at the upstream monitoring point of the reservoir i Calculation of sediment content (SSC) from daily average temperature (Ti) i ;

[0027] According to the allowable siltation value C in the reservoir design data max Determine the target for controlling siltation volume C. Di ;

[0028] According to the sediment content of incoming sand (SSC) i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i :

[0029] According to the storage capacity curve (C) i -Z i (Relationship) The required reservoir capacity C for sediment discharge will be calculated. i Converted to sediment discharge level Z i ;

[0030] According to the sediment content of incoming sand (SSC) i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i Predict the time t for sediment transport to the front of the dam to determine the timing for initiating sediment discharge;

[0031] According to the sediment discharge level Z i The timing of sediment discharge activation is used to output sediment discharge scheduling commands and control the reservoir to adjust the water level to Z. i And start the sand removal process according to the determined sand removal start time.

[0032] Furthermore, the daily flow Q at the upstream monitoring point of the reservoir... i Calculation of sediment content (SSC) from daily average temperature (Ti) i Specifically, it includes:

[0033] SSC i =0.002A i Q i 0.211Ti+0.67 +A i (0.099Q) Ii +0.059)*Q Ii 0.133 +0.002Q Ii (4);

[0034] (5);

[0035] In the formula: A i Q is a geomorphic parameter. i Daily traffic, Q Ii The increase in flow rate on the current day compared to the previous day is calculated by the difference between the current day's flow rate and the previous day's flow rate. Ti is the cumulative average temperature of the current day and the previous 7 days; D is the number of days in a hydrological year; i is the day number in a hydrological year. A hydrological year is calculated from the first day of the month in which the first rise in water occurs in a natural year to the day before the same date in the following year.

[0036] Furthermore, the method based on the sediment content SSC i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i ,include:

[0037] (2);

[0038] C Di =T e ×SSC i ×I i (3);

[0039] In the formula: C i To accommodate the required reservoir capacity for sand removal, m 3 I represents the average annual runoff, in m³. 3 Through daily traffic i Obtained by conversion with time; I i Daily runoff, m 3 It can be converted from the flow rate Q; SSC is the annual average sediment concentration; SSC i This represents the sediment content of the incoming sand on that day, in kg / m³. 3 ;T e The sand-trapping rate is %; C Di This represents the amount of sand interception, expressed in kg.

[0040] Furthermore, the method based on the sediment content SSC i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i The predicted time t for sediment transport to the dam front includes:

[0041] t=f3(SSC) i L, Q i O i (7);

[0042] In the formula: L is the distance from the water and sediment monitoring point to the dam, in km.

[0043] A reservoir sediment discharge scheduling system under abnormal water-sediment relationship conditions includes: a computer-readable storage medium and a processor;

[0044] The computer-readable storage medium is used to store executable instructions;

[0045] The processor is used to read executable instructions stored in the computer-readable storage medium and execute the reservoir sediment discharge scheduling method under the condition of abnormal water-sediment relationship.

[0046] A non-transitory computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the reservoir sediment discharge scheduling method under conditions of abnormal water-sediment relationship. This invention has the following beneficial effects:

[0047] 1. Solve the problem of lack of sediment data: By combining easily monitored data such as flow rate and temperature with formula inversion, the sediment content can be obtained without relying on online sediment content monitoring equipment, thus overcoming the limitation of insufficient sediment observation data in reservoirs on the Qinghai-Tibet Plateau and reducing monitoring costs.

[0048] 2. Adapting to the needs of asynchronous water and sediment scheduling: Based on the sediment content calculation results and sedimentation control targets, the sediment discharge water level is dynamically adjusted through the reservoir capacity-water level linkage model to avoid water resource waste or sedimentation risks when the water-sediment relationship changes (such as "accumulated water in small amounts and withdrawn in large amounts").

[0049] 3. Precisely control the timing of sediment discharge: Introduce a sediment transport time prediction model, and combine it with parameters such as the distance from the monitoring point to the dam front and the outflow rate to accurately predict the time when the sediment peak arrives at the dam front, so as to ensure that the sediment discharge water level adjustment is synchronized with the sediment transport process and improve sediment discharge efficiency.

[0050] 4. Maintain the long-term function of the reservoir: With the design allowable siltation value as the control target, the reservoir capacity and water level are dynamically adjusted to ensure that the siltation process is consistent with the original design, extend the service life, and balance the needs of multiple objectives such as power generation and flood control. Attached Figure Description

[0051] Figure 1 This is a flowchart of the reservoir sediment discharge scheduling method under the condition of abnormal water-sediment relationship of the present invention. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] The sediment discharge of a reservoir is mainly determined by the following factors: the reservoir capacity corresponding to the sediment discharge water level, the inflow and sediment conditions, and the discharge capacity. Among these, the design of the discharge capacity is more related to the inflow conditions. Therefore, the current unified form of sediment interception is mostly:

[0054] C Di =f1(Q) i C i SSC i (1)

[0055] The formula for sand removal ratio is as follows:

[0056] (2)

[0057] C Di =T e ×SSC i ×I i (3)

[0058] In the above formula: C i To accommodate the required reservoir capacity for sand removal, m 3 I represents annual runoff, in m³. 3 ;I i Daily runoff, m 3 It can be converted from the flow rate Q; SSC i The sediment content of incoming sand, kg / m³ 3 ;T e The sand-trapping rate is %; C Di The amount of sand interception is expressed in kg.

[0059] Clearly, setting a reasonable sediment discharge level requires both controlling sedimentation and understanding the complex sediment inflow conditions under climate change.

[0060] The sediment transport conditions can be determined using the daily sediment transport inversion model proposed by Zhang T & Li DF (2021), which considers climate changes such as temperature and runoff.

[0061] SSC i =0.002A i Q i 0.211Ti+0.67 +A i (0.099Q) Ii +0.059)*Q Ii 0.133 +0.002Q Ii (4)

[0062] (5)

[0063] In the formula: Q Ii The percentage increase in traffic volume on a given day compared to the previous day, m3 / s; Ti is the cumulative average temperature of the day and the previous 7 days, in °C; Ai is a geomorphological parameter reflecting the early scouring and deposition characteristics up to the present of a hydrological year. When considering only sediment yield, it can be the quotient of the cumulative runoff up to the present of this hydrological year and the multi-year average annual runoff; Q i Daily traffic, m 3 / s; D is the number of days in a hydrological year (a hydrological year is calculated from the first day of the month in which the first flood occurs in a calendar year to the day before the same date in the following year).

[0064] The target for controlling sedimentation volume, namely the current sedimentation volume C. Di ≤ A certain limiting sedimentation amount C max And C max It can be determined from the reservoir capacity siltation design curve (the reservoir siltation prediction process line provided in the reservoir design report). If the daily-scale C cannot be given... max， Then it can be based on C max The time scale, performing C for that time period. Di The solution is simply to sum the results. In other words, regardless of the amount of sediment, the goal of water management is to ensure that the reservoir's siltation process remains constant.

[0065] At this point, if the conditions for sediment inflow can be inverted, the sedimentation rate C can be controlled according to formula (3). Di A reasonable reservoir capacity (for sediment discharge) needs to be adopted, and the reservoir capacity is controlled by the water level through a reservoir capacity curve. The relationship between the two is as follows:

[0066] C Di =f2(Z i (6)

[0067] In the formula, Z i The sediment discharge level is measured in meters (m); the relationship between the two can be obtained from actual reservoir capacity measurements.

[0068] Make C Di Equals C max By combining formulas (2) to (6), the sediment discharge level Z corresponding to the control design sedimentation volume for this sedimentation process can be obtained. i .

[0069] In situations of drastic climate change and altered water-sediment relationships, this method allows for a more accurate understanding of incoming water and sediment conditions. When other conditions permit, the sediment discharge level can be flexibly adjusted to maintain the reservoir's sedimentation process and functional performance, thus achieving precise sediment discharge scheduling in response to climate change.

[0070] If the reservoir is long, in addition to flexibly adjusting the discharge water level according to the incoming sediment, precise sediment discharge also requires determining the timing of sediment discharge initiation. That is, it is necessary to accurately predict the time it takes for the sediment to be transported to the front of the dam. The sediment transport time model in the reservoir area is as follows:

[0071] t=f3(SSC) i L, Q i O i (7)

[0072] In the formula, L is the distance from the water and sediment monitoring point to the dam, in km; O i For outbound flow, m 3 / s. This model can be calibrated using measured data.

[0073] Please see Figure 1 This invention provides a method for reservoir sediment discharge scheduling under conditions of abnormal water-sediment relationship, comprising the following steps:

[0074] 1. Collect the daily flow Q at the monitoring point upstream of the reservoir. i Daily average temperature Ti and outflow O i ;

[0075] 2. Based on the daily flow Q at the upstream monitoring point of the reservoir i Calculation of sediment content (SSC) from daily average temperature (Ti) i Specifically, the sediment content is calculated using formulas (4) and (5);

[0076] 3. Based on the allowable siltation value C in the reservoir design data. max Determine the target for controlling siltation volume C. Di ;

[0077] 4. Based on the sand content (SSC) of the incoming sand. i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i Specifically, the required reservoir capacity C for sediment discharge at this stage is calculated using formulas (2) and (3). i ;

[0078] 5. Based on the storage capacity curve (C) i -Z i (Relationship) The required reservoir capacity C for sediment discharge will be calculated. i Converted to sediment discharge level Z i ;

[0079] 6. Based on the sediment content (SSC) of the incoming sand. i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i Predict the time t for sediment transport to the front of the dam and determine the timing for starting sediment discharge. Specifically, according to model (7), calibrate the sediment transport time formula to obtain the timing for starting sediment discharge.

[0080] 7. Based on the sediment discharge level Z iThe timing of sediment discharge activation is used to output sediment discharge scheduling commands and control the reservoir to adjust the water level to Z. i The system initiates sand removal according to the determined timing, thereby enabling flexible scheduling and achieving adaptive and precise sand removal.

[0081] Implementation Cases

[0082] A reservoir on a plateau in Tibet is 60 km long and has a total storage capacity of 190 million cubic meters. 3 The normal water level is 3654m, and the reservoir is for daily regulation. Flow rate and air temperature are monitored online at the inlet. However, online monitoring of sediment content is currently not possible; therefore, formulas (4) and (5) are used for calculation, with a flow rate of 7000m³. 3 / s, yielding a daily sediment concentration of 7kg / m. 3 According to the preliminary design of the reservoir, its daily siltation should not exceed 3 million cubic meters. 3 Considering the dry density of sediment is taken as 1, the allowable daily sedimentation is 3 million tons. Using formulas (2) and (3), it can be obtained that the sedimentation rate should be maintained at 101.8 million m³. 3 The reservoir capacity is used for sediment discharge. According to the reservoir capacity curve, the water level corresponding to a capacity of 101.8 million cubic meters is 3640 meters, which is the sediment discharge water level under the conditions of inflow and sediment.

[0083] Based on the previously obtained formula for reservoir sediment transport time, it is known that under these inflow and sediment conditions, it takes 1.5 days for sediment to be transported from the monitoring point to the dam front. Therefore, it should be observed that 7 kg / m³ of sediment is transported from the monitoring point to the dam front. 3 After a period of high sediment content, the water level will drop to 3640m in 1.5 days. This is the opportune time for sediment discharge, which, together with the sediment discharge water level, constitutes a refined sediment discharge scheduling plan to adapt to the incoming sediment.

[0084] This invention has the following features and effects:

[0085] 1. Addressing the lack of sediment data: Calculating sediment concentration (SSC) using easily monitored data such as flow rate and temperature, combined with formulas. i This method eliminates the need for online sediment concentration monitoring equipment, overcomes the limitation of insufficient sediment observation data in reservoirs on the Qinghai-Tibet Plateau, and enables dynamic inversion of sediment conditions.

[0086] 2. Adapting to the asynchronous water and sediment scheduling requirements: Based on the sediment content calculation results and the current sedimentation control target (C Di The sediment discharge level is dynamically determined by the reservoir capacity-water level linkage model (formulas (2) to (6)) to avoid water waste or siltation risk when the water-sediment relationship is distorted (such as "storage in small amounts and withdrawal in large amounts") in the traditional fixed scheduling method.

[0087] 3. Precisely control the timing of sediment discharge: Introduce a sediment transport time prediction model (Formula (7)), combined with the distance from the monitoring point to the dam front (L) and the outflow (O) iBy using parameters such as these, we can accurately predict the time when the sand peak arrives at the dam, ensuring that the adjustment of the sediment discharge water level is synchronized with the sediment transport process, and improving the efficiency of sediment discharge.

[0088] 4. Maintain the long-term function of the reservoir: based on the design allowable siltation value (C). max To achieve the control objectives, the reservoir capacity and water level are dynamically adjusted to ensure that the siltation process is consistent with the original design, extend the service life of the reservoir, and balance the needs of multiple objectives such as power generation and flood control.

[0089] A second aspect of the present invention provides a reservoir sediment discharge scheduling device under conditions of abnormal water-sediment relationship, comprising:

[0090] Data monitoring module: used to collect the daily flow Q at monitoring points upstream of the reservoir. i Daily average temperature Ti and outflow O i ;

[0091] Sediment concentration calculation module: The input end is connected to the data monitoring module and is configured to calculate the sediment concentration based on the daily flow Q at the upstream monitoring point of the reservoir. i Calculation of sediment content (SSC) from daily average temperature (Ti) i ;

[0092] Module for determining sediment retention capacity: Configured to determine the allowable sedimentation value C from the reservoir design data. max Determine the target for controlling siltation volume C. Di ;

[0093] Reservoir capacity calculation module: The input terminals are connected to the sediment concentration calculation module and the sediment retention capacity determination module, respectively, and are configured to calculate based on the incoming sediment concentration SSC. i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i :

[0094] The sediment concentration and water level determination module: its input end is connected to the reservoir capacity calculation module, and it is configured to determine the water level based on the reservoir capacity curve (C). i -Z i (Relationship) The required reservoir capacity C for sediment discharge will be calculated. i Converted to sediment discharge level Z i ;

[0095] Transport time prediction module: The input end is connected to the data monitoring module and the sediment concentration calculation module, and is configured to predict transport time based on the sediment concentration SSC. i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i Predict the time t for sediment transport to the front of the dam to determine the timing for initiating sediment discharge;

[0096] Dispatch and control module: The input terminals are connected to the water level determination module and the transport time prediction module respectively. It is configured to output a sediment discharge dispatching command according to the sediment discharge water level Zi and the sediment discharge start time, control the reservoir to adjust the water level to Zi and start sediment discharge according to the determined sediment discharge start time.

[0097] Another aspect of the present invention provides a reservoir sediment discharge scheduling system under conditions of abnormal water-sediment relationship, comprising: a computer-readable storage medium and a processor;

[0098] The computer-readable storage medium is used to store executable instructions;

[0099] The processor is used to read executable instructions stored in the computer-readable storage medium and execute the reservoir sediment discharge scheduling method under the condition of water-sediment relationship change as described in the first aspect.

[0100] In another aspect, the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the reservoir sediment discharge scheduling method under the condition of abnormal water-sediment relationship as described in the first aspect.

[0101] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0102] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0103] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0104] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0105] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A reservoir sediment discharge scheduling device under abnormal water-sediment relationship conditions, characterized in that, include: Data monitoring module: used to collect the daily flow Q at monitoring points upstream of the reservoir. i Daily average temperature Ti and outflow O i ; Sediment concentration calculation module: The input end is connected to the data monitoring module and is configured to calculate the sediment concentration based on the daily flow Q at the upstream monitoring point of the reservoir. i Calculation of sediment content (SSC) from daily average temperature (Ti) i ; Module for determining sediment retention capacity: Configured to determine the allowable sedimentation value C from the reservoir design data. max Determine the target C for controlling the amount of siltation in this operation. Di ; Reservoir capacity calculation module: The input terminals are connected to the sediment concentration calculation module and the sediment retention capacity determination module, respectively, and are configured to calculate based on the incoming sediment concentration SSC. i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i : The sediment concentration and water level determination module: its input end is connected to the reservoir capacity calculation module, and it is configured to determine the water level based on the reservoir capacity curve C. i -Z i The relationship will calculate the required reservoir capacity C for sediment discharge. i Converted to sediment discharge level Z i ; Transport time prediction module: The input end is connected to the data monitoring module and the sediment concentration calculation module, and is configured to predict transport time based on the incoming sediment concentration SSC. i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i Predict the time t for sediment transport to the front of the dam to determine the timing for initiating sediment discharge; Dispatch and control module: The input terminals are connected to the water level determination module and the transport time prediction module respectively, and are configured to adjust according to the sediment discharge water level Z. i The timing of sediment discharge activation is used to output sediment discharge scheduling commands and control the reservoir to adjust the water level to Z. i And initiate the sand removal process according to the determined sand removal initiation time; The daily flow Q at the upstream monitoring point of the reservoir is mentioned. i Calculation of sediment content (SSC) from daily average temperature (Ti) i Specifically, it includes: SSC i =0.002A i Q i 0.211Ti+0.67 +A i (0.099Q Ii +0.059)*Q Ii 0.133 +0.002Q Ii (4); （5）； In the formula: A i Q is a geomorphic parameter. i Daily traffic, Q Ii The increase in flow rate on the current day compared to the previous day is calculated by the difference between the current day's flow rate and the previous day's flow rate. Ti is the cumulative average temperature of the current day and the previous 7 days; D is the number of days in a hydrological year; i is the day number of the current day in a hydrological year. A hydrological year is calculated from the first day of the month in which the first rise in water occurs in a natural year to the day before the same date in the following year. The method based on the sand content SSC i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i ,include: （2）； C Di =T e ×SSC i ×I i (3); In the formula: C i To accommodate the required reservoir capacity for sand removal, m 3 I represents the average annual runoff, in m³. 3 Through daily traffic i Obtained by conversion with time; I i Daily runoff, m 3 It can be converted from the flow rate Q; SSC is the annual average sediment concentration; SSC i This represents the sediment content of the incoming sand on that day, in kg / m³. 3 ;T e The sand-trapping rate is %; C Di The amount of sand interception is expressed in kg.

2. The reservoir sediment discharge scheduling device under abnormal water-sediment relationship conditions as described in claim 1, characterized in that, The method based on the sand content SSC i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i The predicted time t for sediment transport to the dam front includes: t=f3(SSC i ,L,Q i Oh, oh i ) (7); In the formula: L is the distance from the water and sediment monitoring point to the dam, in km.

3. A method for reservoir sediment discharge scheduling under conditions of abnormal water-sediment relationship, characterized in that, Includes the following steps: Daily flow Q at upstream monitoring points of the reservoir i Daily average temperature Ti and outflow O i ; Based on the daily flow Q at the upstream monitoring point of the reservoir i Calculation of sediment content (SSC) from daily average temperature (Ti) i ; According to the allowable siltation value C in the reservoir design data max Determine the target C for controlling the amount of siltation in this operation. Di ; According to the sediment content of incoming sand (SSC) i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i : According to the storage capacity curve C i -Z i The relationship will calculate the required reservoir capacity C for sediment discharge. i Converted to sediment discharge level Z i ; According to the sediment content of incoming sand (SSC) i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i Predict the time t for sediment transport to the front of the dam to determine the timing for initiating sediment discharge; According to the sediment discharge level Z i The timing of sediment discharge activation is used to output sediment discharge scheduling commands and control the reservoir to adjust the water level to Z. i And initiate the sand removal process according to the determined sand removal initiation time; The daily flow Q at the upstream monitoring point of the reservoir is mentioned. i Calculation of sediment content (SSC) from daily average temperature (Ti) i Specifically, it includes: SSC i =0.002A i Q i 0.211Ti+0.67 +A i (0.099Q Ii +0.059)*Q Ii 0.133 +0.002Q Ii (4); （5）； In the formula: A i Q is a geomorphic parameter. i Daily traffic, Q Ii The increase in flow rate on the current day compared to the previous day is calculated by the difference between the current day's flow rate and the previous day's flow rate. Ti is the cumulative average temperature of the current day and the previous 7 days; D is the number of days in a hydrological year; i is the day number of the current day in a hydrological year. A hydrological year is calculated from the first day of the month in which the first rise in water occurs in a natural year to the day before the same date in the following year. The method based on the sand content SSC i The target for controlling siltation volume in this project is C. Di Calculate the required reservoir capacity C for sand removal. i ,include: （2）； C Di =T e ×SSC i ×I i (3); In the formula: C i To accommodate the required reservoir capacity for sand removal, m 3 I represents the average annual runoff, in m³. 3 Through daily traffic i Obtained by conversion with time; I i Daily runoff, m 3 It can be converted from the flow rate Q; SSC is the annual average sediment concentration; SSC i This represents the sediment content of the incoming sand on that day, in kg / m³. 3 ;T e The sand-trapping rate is %; C Di This represents the amount of sand interception, expressed in kg.

4. The reservoir sediment discharge scheduling method under abnormal water-sediment relationship conditions as described in claim 3, characterized in that, The method based on the sand content SSC i Daily flow Q at upstream monitoring point of reservoir i And outbound flow O i The predicted time t for sediment transport to the dam front includes: t=f3(SSC i ,L,Q i Oh, oh i ) (7); In the formula: L is the distance from the water and sediment monitoring point to the dam, in km.

5. A reservoir sediment discharge scheduling system under conditions of abnormal water-sediment relationship, comprising: Computer-readable storage media and processors; The computer-readable storage medium is used to store executable instructions; The processor is used to read executable instructions stored in the computer-readable storage medium and execute the reservoir sediment discharge scheduling method under the condition of water-sediment relationship variation as described in any one of claims 3-4.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the reservoir sediment discharge scheduling method under the condition of abnormal water-sediment relationship as described in any one of claims 3-4.

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