An inland river basin water resource quantity accurate evaluation system and method

Abstract

The present application relates to the technical field of resource assessment, and particularly relates to a system and method for accurately assessing water resource quantity in an inland river basin, comprising the following steps: arranging a multi-modal sensor network in the inland river basin, collecting hydrological characteristic data of the inland river and surrounding wetlands, extracting implicit water exchange characteristic indexes between the inland river and the wetlands, including wetland groundwater recharge, inland river boundary seepage rate and seasonal water exchange amplitude; based on the implicit water exchange characteristic indexes between the inland river and the wetlands, establishing an inland river-wetland implicit water exchange dynamic model; embedding the inland river-wetland implicit water exchange dynamic model into the water cycle system of the inland river basin, and comprehensively calculating the surface water resource quantity and the groundwater resource quantity in the basin. Through the implicit water exchange between the wetlands and the inland river, the present application eliminates the wetland consumption part, so that the water resource quantity calculation is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of resource assessment, and in particular to a system and method for accurately assessing water resources in inland river basins. Background Art

[0002] Inland river basins are important water resource areas and are widely distributed around the world. Reasonable assessment of inland river water resources is crucial for water resource management, ecological protection, and sustainable development. However, existing inland river basin water resource assessment methods often face many technical difficulties, especially under the influence of complex hydrological and ecological environments such as wetlands and lakes, which leads to significant errors in the calculation of water resource quantities.

[0003] Traditional water resource assessment methods are mainly based on the principle of water balance, and calculate the total amount of water resources through indicators such as precipitation, runoff, and evaporation. However, these methods usually ignore the implicit water exchange phenomenon within inland river basins, especially the water interaction between wetlands and inland rivers. The evapotranspiration, seepage and seasonal precipitation recharge factors of wetlands require nearby inland rivers to fill the gap through groundwater exchange. These factors are often not fully considered in traditional water resource assessments, resulting in large deviations in the assessment results. Summary of the Invention

[0004] The present invention provides a system and method for accurately assessing the amount of water resources in an inland river basin.

[0005] A method for accurately assessing water resources in an inland river basin comprises the following steps:

[0006] S1, Multi-source hydrological and ecological data collection and feature extraction:

[0007] Deploy a multimodal sensor network within the inland river basin to collect hydrological data on the inland river and surrounding wetlands, including changes in inland river water levels, wetland soil moisture, groundwater levels, evapotranspiration rates, and precipitation. The collected data are processed for spatiotemporal consistency to extract implicit water exchange indicators between the inland river and wetland, including wetland groundwater recharge, inland river boundary seepage rates, and seasonal water exchange amplitudes.

[0008] S2, Dynamic modeling of implicit water exchange between inland rivers and wetlands:

[0009] Based on the characteristic indicators of implicit water exchange between inland rivers and wetlands, a dynamic model of implicit water exchange between inland rivers and wetlands was established. This dynamic model includes the infiltration path of inland river seepage to wetlands, the impact of wetland evapotranspiration on groundwater levels, and the dynamic process of seasonal precipitation recharge.

[0010] S3, calculation of total water resources in inland river basins:

[0011] The dynamic model of implicit water exchange between inland rivers and wetlands is embedded in the water cycle system of inland river basins to comprehensively calculate the surface water resources and groundwater resources in the basin. Based on the dynamic model of implicit water exchange between inland rivers and wetlands, the deviations of traditional water resources calculations are corrected to obtain the accurate total water resources in the basin.

[0012] Optionally, the multimodal sensor network in S1 specifically includes:

[0013] Inland river water level change monitoring: Water level sensors are deployed in various sections of inland river basins, distributed at river bends, tributary confluences and recharge areas, to collect real-time inland river water level change data;

[0014] Wetland soil moisture monitoring: A grid-like arrangement is used in the wetland area, with soil moisture sensors installed at multiple soil depths (such as the surface, middle, and deep layers), covering typical wetland vegetation areas and exposed areas, to collect data on wetland soil moisture changes;

[0015] Groundwater level monitoring: Groundwater level sensors are deployed around wetlands and in areas of hidden water exchange between inland rivers and wetlands, focusing on underground seepage paths and recharge-sensitive areas to monitor dynamic changes in groundwater levels.

[0016] Evapotranspiration rate monitoring: Deploy eddy covariance systems or lysimeters at the interface between inland rivers and wetlands and in the core areas of wetlands to monitor the evapotranspiration rate per unit area in real time;

[0017] Precipitation monitoring: Obtain precipitation in inland river basins and wetland areas based on data from the meteorological center.

[0018] Optionally, the extraction of implicit water exchange characteristic indicators between inland rivers and wetlands in S1 specifically includes:

[0019] S11, Spatial registration and consistency processing: Based on the geographic information system (GIS) of the inland river basin, a unified spatial reference framework covering the inland river and wetland areas is established. The collected data on inland river water level changes, wetland soil moisture content, groundwater level, evapotranspiration rate and precipitation are mapped according to geographic coordinates. Using spatial interpolation algorithms, the data of discrete collection points are spatially continuous to fill in the missing values ​​in the uncovered areas.

[0020] S12, calculation of implicit water exchange characteristic index:

[0021] S121, Wetland groundwater recharge: By analyzing the time series changes of wetland soil moisture content and combining it with groundwater level fluctuation data, the vertical groundwater recharge per unit area of ​​wetland is calculated using the water balance method;

[0022] S122, Seepage rate at inland river boundaries: Calculates the horizontal seepage rate at inland river boundaries using a two-dimensional groundwater flow model based on the water level gradient between the inland river water level and the wetland groundwater level, combined with the soil permeability coefficient at the river boundary.

[0023] S123, Seasonal water exchange amplitude: By analyzing the seasonal variation trends of inland river water levels and wetland soil moisture content, the difference in water exchange between inland rivers and wetlands during the wet and dry seasons is calculated, and the seasonal water exchange amplitude is quantified.

[0024] Optionally, the calculation of the wetland groundwater recharge adopts the water balance method to calculate the vertical recharge of the wetland groundwater per unit time: Q w =A s (PER), where Q w is the groundwater recharge to the wetland, A s is the wetland area, P is the precipitation per unit time, E is the evapotranspiration rate per unit time, and R is the surface runoff per unit time;

[0025] The calculation of the inland river boundary seepage rate is based on the gradient between the river water level and the wetland groundwater level, and the horizontal seepage rate per unit time is calculated as: Among them, Q b is the inland river boundary seepage rate, K is the soil permeability coefficient, A b is the seepage cross-sectional area at the inland river boundary, ΔH is the difference between the inland river water level and the wetland groundwater level, and L is the horizontal distance between the inland river boundary and the wetland groundwater recharge area, i.e., the seepage path length;

[0026] The seasonal water exchange amplitude is calculated by performing difference calculation on the water exchange data of the wet season and the dry season to determine the seasonal fluctuation amplitude: Q s =|Q wet -Q dry |, where Q s is the seasonal water exchange amplitude, Q wet is the water exchange volume of inland river wetlands during the flood season, Q dry It is the water exchange volume of inland river wetlands during the dry season.

[0027] Optionally, in S2, the wetland groundwater recharge Q w , inland river boundary seepage rate Q b and seasonal water exchange amplitude Q s , as input variables for the dynamic model of implicit water exchange between inland rivers and wetlands;

[0028] The inland river-wetland implicit water exchange dynamic model includes an inland river seepage path submodule, a wetland evapotranspiration impact submodule and a seasonal precipitation recharge submodule.

[0029] Optionally, the inland river seepage path submodule simulates the path and flow of inland river seepage to the wetland using a two-dimensional groundwater flow equation based on the gradient relationship between the inland river water level and the wetland groundwater level, combined with the boundary permeability coefficient K and the seepage path length L: Among them, K x ,K y is the component of the permeability coefficient in the x and y directions, h is the groundwater level, S is the storage coefficient, t is time, x, y are spatial coordinates, and are partial derivative operators, Indicates the rate of change of the spatial direction, that is, the rate of change of the lateral position

[0030] Response to changes, It represents the rate of change of spatial direction, that is, the response to the change of longitudinal position. represents the water head gradient of the groundwater level in the x direction, represents the water head gradient of the groundwater level in the y direction, It represents the rate of change of groundwater level over time and describes the dynamic changes of groundwater level.

[0031] Optionally, the wetland evapotranspiration impact submodule evaluates the dynamic depletion effect of evapotranspiration on the wetland groundwater level, expressed as: Where ΔH is the dynamic change of groundwater level caused by evapotranspiration, E is the evapotranspiration rate of wetland, and A s is the wetland area, S is the water storage coefficient, Q w is the groundwater recharge of the wetland, and the groundwater level drop caused by evapotranspiration is given by Q w Dynamically correct the recharge volume to ensure the water balance of the wetland.

[0032] Optionally, the seasonal precipitation recharge submodule simulates the dynamic recharge process of seasonal precipitation on the wetland groundwater level, which is expressed as: Q p =P·A r ·η+Q s , where Q p is the corrected seasonal precipitation recharge, P is the precipitation per unit time, A r is the area of ​​precipitation action, η is the soil infiltration rate, Q s is the seasonal water exchange amplitude.

[0033] Optionally, the calculation of the total amount of water resources in the inland river basin in S3 specifically includes:

[0034] Remove implicit water exchange Q 隐性 : The amount of hidden water exchange removed is calculated by the following formula: Q 隐性 =Q 流失+Q ΔH +Q p , where Q 流失 represents the seepage rate from inland rivers to wetlands, Q p represents the amount of water supplied to the wetland by seasonal precipitation, Q ΔH is the change in groundwater volume caused by wetland evapotranspiration, calculated by ΔH, through the wetland area A wetland The dynamic change of groundwater level ΔH is converted into water volume using the following formula: Q ΔH =ΔH·A wetland ;

[0035] Calculate the total water resources in the basin: After removing the implicit water exchange, the corrected total water resources in the basin are obtained: W 流域 =W 地表 +W 地下水 -Q 隐性 Among them, W 流域 represents the total water resources in inland river basins, W 地表 is the surface water resources, obtained by traditional water resources calculation method, W 地下水 Amount of groundwater resources.

[0036] Q 流失 =Q b ×Ap, where Q b is the horizontal seepage rate, and Ap is the cross-sectional area of ​​the seepage path.

[0037] A precise assessment system for water resources in inland river basins, used to implement the aforementioned precise assessment method for water resources in inland river basins, includes the following modules:

[0038] A multi-source hydro-ecological data acquisition and extraction module is used to deploy a multimodal sensor network within the inland river basin to collect hydrological characteristic data of the inland river and surrounding wetlands, including inland river water level changes, wetland soil moisture content, groundwater level, evapotranspiration rate, and precipitation. The collected data is then processed for temporal and spatial consistency to extract characteristic indicators of implicit water exchange between inland rivers and wetlands, including wetland groundwater recharge, inland river boundary seepage rate, and seasonal water exchange amplitude.

[0039] The inland river-wetland implicit water exchange dynamic modeling module establishes an inland river-wetland implicit water exchange dynamic model based on the implicit water exchange characteristic indicators between inland rivers and wetlands extracted by the multi-source hydrological and ecological data acquisition and extraction module. The inland river-wetland implicit water exchange dynamic model includes the infiltration path of inland river seepage to wetlands, the impact of wetland evapotranspiration on groundwater levels, and the dynamic process of seasonal precipitation recharge;

[0040] The total amount of water resources calculation module embeds the inland river-wetland implicit water exchange dynamic model constructed by the inland river-wetland implicit water exchange dynamic modeling module into the inland river basin water cycle system, and comprehensively calculates the surface water resources and groundwater resources in the basin to obtain the accurate total amount of water resources in the inland river basin.

[0041] Beneficial effects of the present invention:

[0042] The present invention compensates for the deviation of traditional water resource calculation methods by introducing a dynamic model of implicit water exchange between inland rivers and wetlands. In traditional methods, the total amount of water resources often does not take into account the implicit water exchange between inland rivers and wetlands, resulting in large errors in the calculation results. By taking factors such as wetland evapotranspiration, inland river seepage and seasonal precipitation recharge into consideration, the amount of surface water and groundwater resources in the basin can be accurately calculated, thereby providing more reliable data support for water resource management and scheduling. Through the implicit water exchange between wetlands and inland rivers, the wetland consumption part is eliminated, making the calculation of water resources more accurate.

[0043] The present invention effectively corrects the impact of wetland water consumption on water resources in the basin. Traditional water resource calculation methods do not fully consider the consumption of water resources by wetland evapotranspiration, resulting in wetland water loss not being taken into account. By introducing a wetland evapotranspiration impact submodule, the dynamic changes in groundwater levels and wetland water consumption caused by wetland evapotranspiration are calculated, and this part of water consumption is further supplemented by water sources in inland river basins. This can dynamically evaluate the impact of wetlands on water resources in the basin and make corrections through water source replenishment strategies to ensure the balance of wetland water in the water resource assessment process and avoid water resource management errors caused by ignoring wetland evapotranspiration. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 Schematic diagram of an evaluation method according to an embodiment of the present invention;

[0046] Figure 2 Schematic diagram of an evaluation system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0048] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0049] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0050] like Figure 1 As shown, a method for accurately assessing water resources in an inland river basin includes the following steps:

[0051] S1. Multi-source hydro-ecological data collection and feature extraction: Deploy a multimodal sensor network within the inland river basin to collect hydrological characteristic data of the inland river and surrounding wetlands, including inland river water level changes, wetland soil moisture content, groundwater level, evapotranspiration rate, and precipitation. The collected data are processed for temporal and spatial consistency to extract implicit water exchange characteristic indicators between the inland river and wetland, including wetland groundwater recharge, inland river boundary seepage rate, and seasonal water exchange amplitude.

[0052] S2, Dynamic Modeling of Implicit Water Exchange between Inland Rivers and Wetlands: Based on the characteristic indicators of implicit water exchange between inland rivers and wetlands, a dynamic model of implicit water exchange between inland rivers and wetlands was established. This dynamic model includes the infiltration path of inland river seepage to wetlands, the impact of wetland evapotranspiration on groundwater levels, and the dynamic process of seasonal precipitation recharge;

[0053] S3, total water resources of inland river basin: the inland river-wetland implicit water exchange dynamic model is embedded in the inland river basin water cycle system to comprehensively calculate the amount of surface water resources and groundwater resources in the basin; based on the inland river-wetland implicit water exchange dynamic model, the deviation of traditional water resources calculation is corrected to obtain the accurate total water resources of the basin.

[0054] The multi-modal sensor network in S1 specifically includes:

[0055] Inland river water level monitoring: water level sensors are arranged at each river section in the inland river basin, distributed in river bends, tributary inlet and recharge area, and real-time inland river water level change data is collected;

[0056] Wetland soil moisture monitoring: grid arrangement is adopted in the wetland area, soil moisture sensors are installed, and are buried in multiple soil depths (such as surface, middle and deep layers), covering typical vegetation areas and bare areas in the wetland, and wetland soil moisture change data is collected;

[0057] Groundwater level monitoring: groundwater level sensors are arranged in the wetland periphery and the implicit water exchange area between the inland river and the wetland, focusing on covering the underground seepage path and recharge sensitive area, and monitoring the dynamic change of groundwater level;

[0058] Evapotranspiration rate monitoring: a vortex covariance system or an evapotranspiration instrument is arranged at the junction area of the inland river and the wetland and the core area of the wetland to monitor the evapotranspiration rate per unit area in real time;

[0059] Precipitation monitoring: based on the meteorological center data, the precipitation in the inland river basin and the wetland area is obtained.

[0060] The extracted inland river-wetland implicit water exchange characteristic index in S1 specifically includes:

[0061] S11, spatial registration and consistency processing: based on the geographic information system (GIS) of the inland river basin, a unified spatial reference framework covering the inland river and wetland area is established, the collected inland river water level change, wetland soil moisture, groundwater level, evapotranspiration rate and precipitation data are mapped according to geographic coordinates, spatial interpolation algorithm is used to perform spatial continuous processing on the data of discrete collection points, fill in the numerical missing of the uncovered area, and generate the inland river-wetland hydrological dynamic distribution map with spatial consistency;

[0062] The spatial interpolation algorithm is expressed as follows: Wherein, Z(x) is the estimated value of the target point x, Z(x i ) is the measured value of the known point x i , λ i is the weight coefficient calculated from the spatial correlation of the known points, and n is the number of known points for interpolation;

[0063] S12, calculation of implicit water exchange characteristic index:

[0064] S121, Wetland groundwater recharge: By analyzing the time series changes of wetland soil moisture content and combining it with groundwater level fluctuation data, the vertical groundwater recharge per unit area of ​​wetland is calculated using the water balance method;

[0065] S122, Seepage rate at inland river boundaries: Calculates the horizontal seepage rate at inland river boundaries using a two-dimensional groundwater flow model based on the water level gradient between the inland river water level and the wetland groundwater level, combined with the soil permeability coefficient at the river boundary.

[0066] S123, Seasonal water exchange amplitude: By analyzing the seasonal variation trends of inland river water levels and wetland soil moisture content, the difference in water exchange between inland rivers and wetlands during the wet and dry seasons is calculated, and the seasonal water exchange amplitude is quantified.

[0067] The calculation of wetland groundwater recharge adopts the water balance method to calculate the vertical recharge of wetland groundwater per unit time: Q w =A s (PER), where Q w is the groundwater recharge to the wetland, A s is the wetland area, P is the precipitation per unit time, E is the evapotranspiration rate per unit time, and R is the surface runoff per unit time;

[0068] The inland river boundary seepage rate is calculated based on the gradient between the river water level and the wetland groundwater level. The horizontal seepage rate per unit time is calculated as follows: Among them, Q b is the inland river boundary seepage rate, K is the soil permeability coefficient, A b is the seepage cross-sectional area at the inland river boundary, ΔH is the difference between the inland river water level and the wetland groundwater level, and L is the horizontal distance between the inland river boundary and the wetland groundwater recharge area, i.e., the seepage path length;

[0069] Calculation of seasonal water exchange amplitude The seasonal fluctuation amplitude is determined by performing difference calculation on the water exchange data of the wet season and the dry season: Q s =|Q wet -Q dry |, where Q s is the seasonal water exchange amplitude, Q wet is the water exchange volume of inland river wetlands during the flood season, Q dry It is the water exchange volume of inland river wetlands during the dry season.

[0070] In S2, the wetland groundwater recharge Q w , inland river boundary seepage rate Q band seasonal water exchange amplitude Q s , as input variables for the dynamic model of implicit water exchange between inland rivers and wetlands;

[0071] The inland river-wetland implicit water exchange dynamic model includes the inland river seepage path submodule, the wetland evapotranspiration impact submodule and the seasonal precipitation recharge submodule.

[0072] The inland river seepage path submodule simulates the path and flow of inland river seepage to wetlands using a two-dimensional groundwater flow equation based on the gradient relationship between the inland river water level and the wetland groundwater level, combined with the boundary permeability coefficient K and the seepage path length L: Among them, K x ,K y is the component of the permeability coefficient in the x and y directions, h is the groundwater level, S is the storage coefficient, t is time, x, y are spatial coordinates, and are partial derivative operators, It represents the rate of change of spatial direction, that is, the response to the change of lateral position. It represents the rate of change of spatial direction, that is, the response to the change of longitudinal position. represents the water head gradient of the groundwater level in the x direction, represents the water head gradient of the groundwater level in the y direction, It represents the rate of change of groundwater level over time and describes the dynamic changes of groundwater level.

[0073] The boundary seepage rate Q b Substituted as a boundary condition into the two-dimensional groundwater flow equation, it appears in the form of a boundary flow term. The boundary condition can be expressed by the water level difference. Specifically, when solving the groundwater flow equation, the infiltration path between the inland river and the wetland constrains the groundwater flow through the boundary condition. The boundary condition can be expressed as: (at the permeability boundary).

[0074] The wetland evapotranspiration impact submodule assesses the dynamic depletion effect of evapotranspiration on the wetland groundwater level, expressed as: Where ΔH is the dynamic change of groundwater level caused by evapotranspiration, E is the evapotranspiration rate of wetland, and A s is the wetland area, S is the water storage coefficient, Q w is the groundwater recharge of the wetland, and the groundwater level drop caused by evapotranspiration is given by Q w Dynamically correct the recharge volume to ensure the water balance of the wetland.

[0075] The seasonal precipitation recharge submodule simulates the dynamic recharge process of seasonal precipitation on the wetland groundwater level, which is expressed as: Q p =P·A r ·η+Qs , where Q p is the corrected seasonal precipitation recharge, P is the precipitation per unit time, A r is the area of ​​precipitation action, η is the soil infiltration rate, Q s is the seasonal water exchange amplitude, Q s As a correction factor for seasonal water dynamics, it reflects the extent of changes in precipitation on water exchange between wetlands and inland rivers.

[0076] The calculation of total water resources in inland river basins in S3 specifically includes:

[0077] Remove implicit water exchange Q 隐性 :When calculating the total amount of water resources in a basin, it is necessary to remove the implicit water exchange from inland rivers to wetlands. Specifically, the amount of implicit water exchange removed is calculated using the following formula: Q 隐性 =Q 流失 +Q ΔH +Q p , where Q 流失 represents the seepage rate from inland rivers to wetlands, Q p represents the amount of water supplied to the wetland by seasonal precipitation, Q ΔH is the change in groundwater volume caused by wetland evapotranspiration, calculated by ΔH, through the wetland area A wetland The dynamic change of groundwater level ΔH is converted into water volume using the following formula: Q ΔH =ΔH·A wetland ;

[0078] Calculate the total water resources in the basin: After removing the implicit water exchange, the corrected total water resources in the basin are obtained: W 流域 =W 地表 +W 地下水 -Q 隐性 Among them, W 流域 represents the total water resources in inland river basins, W 地表 is the surface water resources, obtained by traditional water resources calculation method, W 地下水 The amount of groundwater resources is obtained through traditional groundwater models.

[0079] Q 流失 =Q b ×Ap, where Q b is the horizontal seepage rate, and Ap is the cross-sectional area of ​​the seepage path.

[0080] like Figure 2 As shown, a precise assessment system for water resources in inland river basins is used to implement the above-mentioned precise assessment method for water resources in inland river basins, and includes the following modules:

[0081] The multi-source hydrological ecological data acquisition and extraction module is used for arranging a multi-modal sensor network in the inland river basin, collecting hydrological characteristic data of the inland river and the surrounding wetland, including inland river water level change, wetland soil water content, underground water level, evapotranspiration rate and precipitation, and performing spatio-temporal consistency processing on the collected data, and extracting an implicit water exchange characteristic index between the inland river and the wetland, including wetland groundwater recharge, inland river boundary seepage rate and seasonal water exchange amplitude.

[0082] The inland river-wetland implicit water exchange dynamic modeling module is based on the implicit water exchange characteristic index between the inland river and the wetland extracted by the multi-source hydrological ecological data acquisition and extraction module, establishes an inland river-wetland implicit water exchange dynamic model, and the inland river-wetland implicit water exchange dynamic model includes a seepage path of inland river seepage to the wetland, an influence of wetland evapotranspiration on the underground water level and a dynamic process of seasonal precipitation recharge, so as to accurately simulate and predict water exchange and flow in the basin.

[0083] The water resource amount total calculation module embeds the inland river-wetland implicit water exchange dynamic model constructed by the inland river-wetland implicit water exchange dynamic modeling module into the inland river basin water cycle system, and comprehensively calculates the surface water resource amount and the underground water resource amount in the basin to obtain the accurate total amount of the inland river basin water resources.

[0084] The present application encompasses any substitutions, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order for the public to have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0085] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A method for accurately assessing water resources in an inland river basin, characterized in that: The following steps are involved: S1, Multi-source hydrological and ecological data collection and feature extraction: Deploy a multimodal sensor network within the inland river basin to collect hydrological data on the inland river and surrounding wetlands, including changes in inland river water levels, wetland soil moisture, groundwater levels, evapotranspiration rates, and precipitation. The collected data will be processed for temporal and spatial consistency to extract implicit water exchange indicators between inland rivers and wetlands, including wetland groundwater recharge, inland river boundary seepage rates, and seasonal water exchange amplitudes. The extraction of implicit water exchange characteristic indicators between inland rivers and wetlands specifically includes: S11, Spatial Registration and Consistency Processing: Based on the geographic information system of the inland river basin, a unified spatial reference framework covering the inland river and wetland areas is established. The collected data on inland river water level changes, wetland soil moisture content, groundwater level, evapotranspiration rate, and precipitation are mapped according to geographic coordinates. Using spatial interpolation algorithms, the data of discrete collection points are spatially continuous to fill in the missing values ​​in the uncovered areas. S12, calculation of implicit water exchange characteristic index: S121, Wetland groundwater recharge: By analyzing the time series changes of wetland soil moisture content and combining it with groundwater level fluctuation data, the vertical groundwater recharge per unit area of ​​wetland is calculated using the water balance method; S122, Seepage rate at inland river boundaries: Calculates the horizontal seepage rate at inland river boundaries using a two-dimensional groundwater flow model based on the water level gradient between the inland river water level and the wetland groundwater level, combined with the soil permeability coefficient at the river boundary. S123, Seasonal Water Exchange Amplitude: By analyzing the seasonal variation trends of inland river water levels and wetland soil moisture, the difference in water exchange between inland rivers and wetlands during the wet and dry seasons is calculated, and the seasonal water exchange amplitude is quantified. S2, Dynamic modeling of implicit water exchange between inland rivers and wetlands: Based on the characteristic indicators of implicit water exchange between inland rivers and wetlands, a dynamic model of implicit water exchange between inland rivers and wetlands was established. This dynamic model includes the infiltration path of inland river seepage to wetlands, the impact of wetland evapotranspiration on groundwater levels, and the dynamic process of seasonal precipitation recharge. S3, calculation of total water resources in inland river basins: The dynamic model of implicit water exchange between inland rivers and wetlands is embedded in the water cycle system of inland river basins to comprehensively calculate the surface water resources and groundwater resources in the basin. Based on the dynamic model of implicit water exchange between inland rivers and wetlands, the deviations of traditional water resources calculations are corrected to obtain the accurate total water resources in the basin.

2. The method for accurately assessing water resources in an inland river basin according to claim 1 is characterized in that: The multimodal sensor network in S1 specifically includes: Inland river water level change monitoring: Water level sensors are deployed in various sections of inland river basins, distributed at river bends, tributary confluences and recharge areas, to collect real-time inland river water level change data; Wetland soil moisture monitoring: A grid-like layout is used in the wetland area, and soil moisture sensors are installed. They are buried in multiple layers of soil depth, covering typical vegetation areas and exposed areas of the wetland, and collecting wetland soil moisture change data; Groundwater level monitoring: Groundwater level sensors are deployed around wetlands and in areas of hidden water exchange between inland rivers and wetlands to monitor dynamic changes in groundwater levels; Evapotranspiration rate monitoring: Deploy eddy covariance systems or lysimeters at the interface between inland rivers and wetlands and in the core areas of wetlands to monitor the evapotranspiration rate per unit area in real time; Precipitation monitoring: Obtain precipitation in inland river basins and wetland areas based on data from the meteorological center.

3. The method for accurately assessing water resources in an inland river basin according to claim 1 is characterized in that: The calculation of the wetland groundwater recharge adopts the water balance method to calculate the vertical recharge of the wetland groundwater per unit time: ,in, is the groundwater recharge to the wetland, is the wetland area, is the amount of precipitation per unit time, is the evaporation rate per unit time, is the surface runoff per unit time; The calculation of the inland river boundary seepage rate is based on the gradient between the river water level and the wetland groundwater level, and the horizontal seepage rate per unit time is calculated as: ,in, is the inland river boundary seepage rate, is the soil permeability coefficient, is the boundary seepage cross-sectional area of ​​the inland river, is the difference between the inland river water level and the wetland groundwater level. is the horizontal distance between the inland river boundary and the wetland groundwater recharge area, i.e., the seepage path length; The seasonal water exchange amplitude is calculated by performing a difference calculation on the water exchange data of the wet season and the dry season to determine the seasonal fluctuation amplitude: ,in, is the seasonal water exchange amplitude, is the water exchange volume of inland river wetlands during the flood season, It is the water exchange volume of inland river wetlands during the dry season.

4. The method for accurately assessing water resources in an inland river basin according to claim 3 is characterized in that: In S2, the wetland groundwater recharge , inland river boundary seepage rate and seasonal water exchange amplitude , as input variables for the dynamic model of implicit water exchange between inland rivers and wetlands; The inland river-wetland implicit water exchange dynamic model includes an inland river seepage path submodule, a wetland evapotranspiration impact submodule and a seasonal precipitation recharge submodule.

5. The method for accurately assessing water resources in an inland river basin according to claim 4 is characterized in that: The inland river seepage path submodule is based on the gradient relationship between the inland river water level and the wetland groundwater level, combined with the boundary permeability coefficient and seepage path length , a two-dimensional groundwater flow equation is used to simulate the path and flow of inland river seepage to wetlands: ,in, is the permeability coefficient in and The direction component, is the groundwater level, is the water storage coefficient, It's time, are spatial coordinates, and are partial derivative operators, represents the rate of change in the spatial 𝑥 direction, that is, the response to the change in the lateral position 𝑥, represents the rate of change in the spatial 𝑦 direction, that is, the response to the change in the longitudinal position 𝑦, Indicates that the groundwater level is Head gradient in the direction, Indicates that the groundwater level is Head gradient in the direction, It represents the rate of change of groundwater level over time and describes the dynamic changes of groundwater level.

6. The method for accurately assessing water resources in an inland river basin according to claim 5, characterized in that: The wetland evapotranspiration impact submodule evaluates the dynamic consumption effect of evapotranspiration on the wetland groundwater level, which is expressed as: ,in, It is the dynamic change of groundwater level caused by evapotranspiration. is the wetland evapotranspiration rate, is the wetland area, is the water storage coefficient, is the groundwater recharge to the wetland, and the groundwater level drop caused by evapotranspiration is Dynamically correct the recharge volume to ensure the water balance of the wetland.

7. The method for accurately assessing water resources in an inland river basin according to claim 6, characterized in that: The seasonal precipitation recharge submodule simulates the dynamic recharge process of seasonal precipitation on the wetland groundwater level, which is expressed as: ,in, is the adjusted seasonal precipitation recharge, is the amount of precipitation per unit time, is the area of ​​precipitation action, is the soil infiltration rate, is the seasonal water exchange amplitude.

8. The method for accurately assessing water resources in an inland river basin according to claim 7, characterized in that: The calculation of the total amount of water resources in the inland river basin in S3 specifically includes: Remove hidden water exchange : The amount of hidden water exchange removed is calculated by the following formula: ,in, represents the seepage rate from inland rivers to wetlands, represents the amount of water supplied to the wetland by seasonal precipitation, is the change in groundwater volume caused by wetland evapotranspiration, Calculate the area of ​​wetlands Dynamic changes in groundwater levels Converted to water volume, the formula is as follows: ; Calculate the total water resources in the basin: After removing the implicit water exchange, the corrected total water resources in the basin are obtained: ;in, represents the total amount of water resources in inland river basins, is the surface water resources, Amount of groundwater resources; ,in, is the horizontal seepage rate, is the cross-sectional area of ​​the seepage path.

9. A precise assessment system for water resources in an inland river basin, for implementing a precise assessment method for water resources in an inland river basin as claimed in any one of claims 1 to 8, characterized in that: Includes the following modules: A multi-source hydro-ecological data acquisition and extraction module is used to deploy a multimodal sensor network within the inland river basin to collect hydrological characteristic data of the inland river and surrounding wetlands, including inland river water level changes, wetland soil moisture content, groundwater level, evapotranspiration rate, and precipitation. The collected data is then processed for temporal and spatial consistency to extract characteristic indicators of implicit water exchange between inland rivers and wetlands, including wetland groundwater recharge, inland river boundary seepage rate, and seasonal water exchange amplitude. The inland river-wetland implicit water exchange dynamic modeling module establishes an inland river-wetland implicit water exchange dynamic model based on the implicit water exchange characteristic indicators between inland rivers and wetlands extracted by the multi-source hydrological and ecological data acquisition and extraction module. The inland river-wetland implicit water exchange dynamic model includes the infiltration path of inland river seepage to wetlands, the impact of wetland evapotranspiration on groundwater levels, and the dynamic process of seasonal precipitation recharge; The total amount of water resources calculation module embeds the inland river-wetland implicit water exchange dynamic model constructed by the inland river-wetland implicit water exchange dynamic modeling module into the inland river basin water cycle system, and comprehensively calculates the surface water resources and groundwater resources in the basin to obtain the accurate total amount of water resources in the inland river basin.

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