Method, device, equipment and medium for quantifying water energy resource loss caused by evaporation

Abstract

The embodiment of the invention provides a method for quantifying water energy resource loss caused by evaporation. The method comprises the following steps: acquiring meteorological information and water temperature information of a plurality of point locations in a preset time period of a reservoir; according to the meteorological information and the water temperature information of the multiple point locations, the average evaporation rate of the reservoir in the preset time period is determined; acquiring water storage and discharge conditions of the reservoir in a historical record, and determining a plurality of water areas of the reservoir in the historical record according to the water storage and discharge conditions in the historical record; correcting a water level area relation curve of the reservoir according to a plurality of water area areas of the reservoir which are historically recorded, and determining the water area of the reservoir in a preset time period according to the corrected water level area relation curve of the reservoir; determining the evaporation loss amount of the reservoir in the preset time period according to the average evaporation rate and the water area of the reservoir at the end of the preset time period; and according to the evaporation loss amount of the reservoir in the preset time period, determining the water energy resource power generation amount of the reservoir due to evaporation loss.

Description

Technical Field

[0001] The invention relates to the technical field of water resource management, and in particular to a method, device, equipment and medium for quantifying water energy resource loss caused by evaporation. Background Art

[0002] Evaporation is one of the main ways of dissipating reservoir water resources. Establishing an accurate method for calculating reservoir evaporation water volume and a method for quantifying evaporation-loss water energy resources can support the refined management of reservoir water resources and improve the efficiency of water energy resource utilization. When calculating the amount of reservoir evaporation water, related technologies mainly rely on evaporation pan monitoring and multiplying by a conversion coefficient. The amount of evaporated water calculated by this method is not accurate. In addition, the existing technology has not yet expanded the calculation of evaporation-loss water volume to the quantitative calculation of evaporation-loss water energy resource power generation, which limits the refined management of water resources and the improvement of water energy resource utilization efficiency. Summary of the invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide a method, device, equipment and medium for quantifying water energy resource loss due to evaporation, which overcomes the above problems or at least partially solves the above problems.

[0004] In order to solve the above problems, an embodiment of the present invention discloses a method for quantifying water energy resource loss caused by evaporation, comprising:

[0005] Obtain meteorological information and water temperature information at multiple points in the reservoir within a preset period of time;

[0006] Determine the average evaporation rate of the reservoir during a preset time period based on the meteorological information and water temperature information of the multiple points;

[0007] Obtain the water storage and release conditions of the reservoir history records, and determine multiple water areas of the reservoir history records based on the water storage and release conditions of the reservoir history records;

[0008] According to the multiple water areas of the reservoir recorded in the history, the water level-area relationship curve of the reservoir is corrected, and the water area of ​​the reservoir at the end of the preset time period is determined according to the corrected water level-area relationship curve of the reservoir;

[0009] Determine the evaporation loss of the reservoir in the preset period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period;

[0010] Based on the evaporation loss of the reservoir during a preset period, the amount of power generated by the reservoir's hydropower resources due to evaporation is determined.

[0011] Optionally, determining the average evaporation rate of the reservoir in a preset time period according to the meteorological information and water temperature information of the multiple points includes:

[0012] Determining the evaporation rate of the characteristic points in the reservoir according to the meteorological information and water temperature information of the plurality of points;

[0013] Obtain the latitude and longitude information of multiple meteorological stations within the reservoir;

[0014] Determine the reservoir area controlled by each meteorological station according to the latitude and longitude information of each meteorological station;

[0015] The average evaporation rate of the reservoir is determined based on the evaporation rate of the characteristic points, the reservoir area controlled by each meteorological station, and the total area of ​​the reservoir.

[0016] Optionally, determining the reservoir area controlled by each meteorological station according to the latitude and longitude information of each meteorological station includes:

[0017] The vector range of the reservoir is obtained, and Thiessen polygon division is performed according to the vector range of the reservoir and the longitude and latitude information of each meteorological station to obtain the reservoir area controlled by each meteorological station.

[0018] Optionally, the determining of multiple water areas of the reservoir recorded in the historical records based on the water storage and release conditions in the historical records includes:

[0019] Determine the time interval from the end of the first water storage and release to the end of the second water storage and release in the historical record as the first characteristic time period;

[0020] Acquire a plurality of second characteristic time periods during which the amount of water in the reservoir changes during the first characteristic time period;

[0021] Acquiring remote sensing images of the plurality of second characteristic time periods;

[0022] Determining a normalized difference water index based on the remote sensing images of the plurality of second characteristic time periods;

[0023] The water area of ​​the reservoir in each second characteristic time period is determined according to the normalized difference water body index.

[0024] Optionally, the step of correcting the water level-area relationship curve of the reservoir according to the multiple water areas of the reservoir recorded in the history, and determining the water area of ​​the reservoir at the end of the preset period according to the corrected water level-area relationship curve of the reservoir includes:

[0025] Obtain the water level value of the reservoir in each second characteristic period;

[0026] According to the water area and water level value of the reservoir in each second characteristic period, the original water level-area relationship curve of the reservoir is corrected to obtain a corrected water level-area relationship curve of the reservoir;

[0027] Obtain the reservoir inflow, outflow, runoff inflow, water withdrawal, and evaporation depth for a preset period of time;

[0028] Determine the water level change during the preset period according to the reservoir inflow, outflow, runoff inflow, water withdrawal, and evaporation depth during the preset period;

[0029] Determine the water level value at the end of the preset period according to the reservoir water level value at the initial moment of the preset period and the water level change during the preset period;

[0030] The water level value at the end of the preset time period is substituted into the water level-area relationship curve of the corrected reservoir to obtain the water area of ​​the reservoir at the end of the preset time period.

[0031] Optionally, determining the evaporation loss of the reservoir in the preset period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period includes:

[0032] Determining the evaporation depth of the reservoir in a preset period of time according to the average evaporation rate;

[0033] The evaporation loss of the reservoir during the preset period is determined according to the evaporation water depth value and the water area of ​​the reservoir at the end of the preset period.

[0034] Optionally, the step of determining the amount of hydropower resources power generation lost due to evaporation in the reservoir according to the evaporation loss in the preset time period includes:

[0035] Obtain the flow rate of the reservoir and hydropower station at the initial moment in the preset time period, and the difference between the reservoir water surface and the turbine head at the initial moment;

[0036] The amount of power generated by the hydropower station due to evaporation in the reservoir is determined based on the flow rate of the reservoir at the initial moment, the difference between the water surface of the reservoir and the water head of the turbine at the initial moment, and the evaporation depth value of the reservoir during a preset period of time.

[0037] The present invention also discloses a device for quantifying water energy resource loss caused by evaporation, comprising:

[0038] An acquisition module is used to obtain meteorological information and water temperature information at each point in the reservoir within a preset period of time;

[0039] A rate determination module, used to determine the average evaporation rate of the reservoir in a preset time period according to the meteorological information and water temperature information of each point;

[0040] The first area determination module is used to obtain the water storage and release conditions of the reservoir history records, and determine multiple water areas of the reservoir history records according to the water storage and release conditions of the historical records;

[0041] A second area determination module is used to correct the water level-area relationship curve of the reservoir according to the multiple water areas of the reservoir recorded in the history, and determine the water area of ​​the reservoir at the end of the preset time period according to the corrected water level-area relationship curve of the reservoir;

[0042] A loss amount determination module, used to determine the evaporation loss amount of the reservoir in a preset period of time according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period of time;

[0043] The power generation determination module is used to determine the power generation of the water energy resources lost in the reservoir due to evaporation according to the evaporation loss of the reservoir in a preset period of time.

[0044] Optionally, the rate determination module includes:

[0045] A first determination submodule is used to determine the evaporation rate of the characteristic points in the reservoir according to the meteorological information and water temperature information of the plurality of points;

[0046] The first acquisition submodule is used to obtain the longitude and latitude information of multiple meteorological stations within the reservoir;

[0047] A second determination submodule is used to determine the reservoir area controlled by each meteorological station according to the latitude and longitude information of each meteorological station;

[0048] The third determination submodule is used to determine the average evaporation rate of the reservoir according to the evaporation rate of the characteristic point, the reservoir area controlled by each meteorological station, and the total area of ​​the reservoir.

[0049] Optionally, the second determining submodule includes:

[0050] A determination unit is used to obtain the vector range of the reservoir, perform Thiessen polygon division according to the vector range of the reservoir and the latitude and longitude information of each meteorological station, and obtain the reservoir area controlled by each meteorological station

[0051] Optionally, the first area determination module includes:

[0052] A characteristic time period determination submodule, configured to determine the time interval from the end of the first water storage and release to the end of the second water storage and release in the historical record as a first characteristic time period;

[0053] A second acquisition submodule is used to acquire a plurality of second characteristic time periods during which the water volume in the reservoir changes during the first characteristic time period;

[0054] A third acquisition submodule is used to acquire the remote sensing images of the plurality of second characteristic time periods;

[0055] An index determination submodule, used to determine a normalized difference water index based on the remote sensing images of the plurality of second characteristic time periods;

[0056] The fourth determination submodule is used to determine the water area of ​​the reservoir in each second characteristic time period according to the normalized difference water body index.

[0057] Optionally, the second area determination module includes:

[0058] The fourth acquisition submodule is used to obtain the water level value of the reservoir in each second characteristic period;

[0059] A fitting submodule, for correcting the original water level-area relationship curve of the reservoir according to the water area and water level value of the reservoir in each second characteristic period to obtain a corrected water level-area relationship curve of the reservoir;

[0060] The fifth acquisition submodule is used to obtain the reservoir inflow, outflow, runoff inflow, water withdrawal, and evaporation depth during a preset period;

[0061] The variation determination submodule is used to determine the water level variation during the preset period according to the reservoir inflow, outflow, runoff inflow, water withdrawal, and evaporation depth during the preset period;

[0062] A fifth determination submodule, used to determine the water level value at the end of the preset period according to the reservoir water level value at the initial moment of the preset period and the water level change during the preset period;

[0063] The substitution submodule is used to substitute the water level value at the end of the preset time period into the water level-area relationship curve of the corrected reservoir to obtain the water area of ​​the reservoir at the end of the preset time period.

[0064] Optionally, the loss amount determination module includes:

[0065] A sixth determination submodule, used to determine the evaporation water depth value of the reservoir in a preset period of time according to the average evaporation rate;

[0066] The seventh determination submodule is used to determine the evaporation loss of the reservoir in the preset period according to the evaporation water depth value and the water area of ​​the reservoir at the end of the preset period.

[0067] Optionally, the power generation determination module includes:

[0068] The sixth acquisition submodule is used to obtain the flow rate of the reservoir and the hydropower station at the initial moment in the preset time period, and the difference between the reservoir water surface and the turbine head at the initial moment;

[0069] The eighth determination submodule is used to determine the amount of power generated by water resources lost due to evaporation in the reservoir based on the outflow of the reservoir hydropower station at the initial moment, the difference between the water surface of the reservoir and the water head of the turbine at the initial moment, and the evaporation water depth value of the reservoir during a preset period of time.

[0070] The present invention also discloses an electronic device, comprising: a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the method for quantifying water energy resource loss due to evaporation as described above are implemented.

[0071] The present invention also discloses a non-volatile readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for quantifying the loss of water energy resources due to evaporation as described above are implemented.

[0072] The embodiments of the present invention include the following advantages:

[0073] The present invention discloses a method for quantifying water energy resource loss due to evaporation, which can be achieved by obtaining meteorological information and water temperature information of multiple points within a preset time period of a reservoir; determining the average evaporation rate of the reservoir in the preset time period according to the meteorological information and water temperature information of the multiple points; obtaining the water storage and discharge conditions recorded in the historical records of the reservoir, and determining multiple water areas of the reservoir recorded in the historical records according to the water storage and discharge conditions recorded in the historical records; correcting the water level-area relationship curve of the reservoir according to the multiple water areas of the reservoir recorded in the historical records, and determining the water area of ​​the reservoir at the end of the preset time period according to the corrected water level-area relationship curve of the reservoir; determining the evaporation loss of the reservoir in the preset time period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset time period; determining the amount of water energy resource power generation lost by the reservoir due to evaporation according to the evaporation loss of the reservoir in the preset time period; the present invention can realize accurate estimation of reservoir evaporation loss and water energy resource power generation by comprehensively utilizing meteorological information, water temperature information, water storage and discharge conditions and water area data, and provide scientific support for water resource management and hydropower station operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 It is a flowchart of the steps of a method for quantifying water energy resource loss due to evaporation provided by an embodiment of the present invention;

[0075] Figure 2 It is a schematic diagram of water storage and release provided by an embodiment of the present invention;

[0076] Figure 3 is a schematic diagram of a first characteristic time period provided by an embodiment of the present invention;

[0077] Figure 4 It is a schematic diagram of a water area-water level relationship curve provided by an embodiment of the present invention;

[0078] Figure 5 This is a schematic diagram of power generation of a hydropower station provided by an embodiment of the present invention;

[0079] Figure 6 The invention is a block diagram of a device for quantifying water energy resource loss caused by evaporation provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0080] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0081] One of the core concepts of the embodiments of the present invention is that the meteorological information and water temperature information of multiple points in a preset time period of the reservoir can be obtained; according to the meteorological information and water temperature information of multiple points, the average evaporation rate of the reservoir in the preset time period can be determined; the water storage and discharge conditions recorded in the historical records of the reservoir are obtained, and according to the water storage and discharge conditions recorded in the historical records, multiple water areas of the reservoir recorded in the historical records are determined; according to the multiple water areas of the reservoir recorded in the historical records, the water level-area relationship curve of the reservoir is corrected, and the water area of ​​the reservoir at the end of the preset time period is determined according to the corrected water level-area relationship curve of the reservoir; according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset time period, the evaporation loss of the reservoir in the preset time period is determined; according to the evaporation loss of the reservoir in the preset time period, the amount of hydropower resource power generation lost by the reservoir due to evaporation is determined; the present invention can realize accurate estimation of the evaporation loss of the reservoir and the amount of hydropower resource power generation by comprehensively utilizing meteorological information, water temperature information, water storage and discharge conditions and water area data, and provide scientific support for water resource management and hydropower station operation; the present invention can monitor and analyze the evaporation loss in real time, provide early warning for extreme weather events such as drought, help formulate emergency response measures, and reduce disaster losses.

[0082] Reference Figure 1 , shows a flow chart of the steps of a method for quantifying water energy resource loss caused by evaporation provided by an embodiment of the present invention, and the method may specifically include the following steps:

[0083] Step 101, obtaining meteorological information and water temperature information of multiple points in a preset period of time in a reservoir;

[0084] In an embodiment of the present invention, meteorological information may include air temperature, sunshine, relative humidity, air pressure and wind speed information of the area where the reservoir is located, and water temperature information may include water vapor temperature difference of the area where the reservoir is located. Wind speed information and water vapor temperature difference of multiple points in the area where the reservoir is located may be obtained.

[0085] It should be noted that the preset time period can be set according to the needs of the user, for example, it can be one day, three months, six months, or one year, and there is no limitation here.

[0086] Step 102, determining the average evaporation rate of the reservoir during a preset time period based on the meteorological information and water temperature information at multiple points.

[0087] In the embodiment of the present invention, after obtaining meteorological information and water temperature information at multiple points, the average evaporation rate of the reservoir in a preset time period can be determined.

[0088] In one embodiment of the present invention, the average evaporation rate of a reservoir in a preset time period is determined based on meteorological information and water temperature information at multiple points, including: determining the evaporation rate of characteristic points in the reservoir based on the meteorological information and water temperature information at multiple points; obtaining the longitude and latitude information of multiple meteorological stations within the reservoir; determining the reservoir area controlled by each meteorological station based on the longitude and latitude information of each meteorological station; determining the average evaporation rate of the reservoir based on the evaporation rate of the characteristic points, the reservoir area controlled by each meteorological station, and the total area of ​​the reservoir.

[0089] In the embodiment of the present invention, the evaporation rate of the characteristic points in the reservoir can be determined according to the meteorological information and water temperature information of multiple points, as shown in formula (1):

[0090]

[0091] Among them, E i is the evaporation rate of the characteristic point of the reservoir; a, b, c are constants, K represents the evaporation conversion coefficient; U is the wind speed, in m / s; is the water temperature difference, unit is ℃; When 04 =0, When 04 =0.01; e z represents the saturated water vapor pressure, in hPa; e represents the actual water vapor pressure, in hPa.

[0092] After calculating the evaporation rate of the characteristic points in the reservoir, the average evaporation rate of the reservoir can be determined based on the evaporation rate of the characteristic points, the reservoir area controlled by each meteorological station, and the total area of ​​the reservoir, as shown in formula (2):

[0093]

[0094] in, represents the average evaporation rate in the reservoir area; N represents the number of meteorological stations around the reservoir; A i represents the reservoir area controlled by meteorological station i; A represents the total area of ​​the reservoir area.

[0095] In one embodiment of the present invention, the reservoir area controlled by each meteorological station is determined according to the longitude and latitude information of each meteorological station, including: obtaining the vector range of the reservoir, performing Thiessen polygon division according to the vector range of the reservoir and the longitude and latitude information of each meteorological station, and obtaining the reservoir area controlled by each meteorological station.

[0096] In an embodiment of the present invention, Voronoi Diagram is a space partitioning method, which divides a point set in a plane or space into multiple regions, each region contains a generating point, and the distance from any point in the region to the generating point is closer than the distance to other generating points. The vector range of the reservoir can be obtained first, and then Voronoi polygon division can be performed according to the vector range of the reservoir and the longitude and latitude information of each meteorological station, so that the reservoir area controlled by each meteorological station node can be obtained.

[0097] Step 103, obtaining the water storage and release conditions of the reservoir historical records, and determining multiple water areas of the reservoir in the historical records based on the water storage and release conditions in the historical records.

[0098] In an embodiment of the present invention, the water storage and discharge conditions of the reservoir's historical records can be obtained first, for example, the water storage and discharge conditions for multiple time periods since the reservoir was put into operation can be obtained, and then based on the water storage and discharge conditions for multiple time periods since the reservoir was put into operation, multiple water areas for multiple time periods since the reservoir was put into operation can be calculated.

[0099] In one embodiment of the present invention, multiple water areas of a reservoir recorded in the historical records are determined based on the water storage and discharge conditions in the historical records, including: determining the time interval from the end of the first water storage and discharge to the end of the second water storage and discharge in the historical records as a first characteristic time period; obtaining multiple second characteristic time periods in which the water volume in the reservoir changes during the first characteristic time period; obtaining remote sensing images of multiple second characteristic time periods; determining a normalized difference water body index based on the remote sensing images of the multiple second characteristic time periods; and determining the water area of ​​the reservoir in each second characteristic time period based on the normalized difference water body index.

[0100] In the embodiment of the present invention, the operation may include multiple storage and release of water since the start of production, such as Figure 2 , showing a schematic diagram of water storage and release provided by an embodiment of the present invention, the time interval from the end of the first water storage and release to the end of the second water storage and release since the commissioning can be determined as the first characteristic period. Since the water release of the upstream reservoir or the interval precipitation is sufficient to change the water level, the first characteristic period can be divided into multiple second characteristic periods, such as Figure 3, shows a schematic diagram of a first characteristic period provided by an embodiment of the present invention. For example, the first characteristic period can be divided into second characteristic period 1, second characteristic period 2, second characteristic period 3, and second characteristic period 4 according to the water discharge and precipitation conditions of the upstream reservoir. The Landsat remote sensing images corresponding to each second characteristic period are screened and downloaded, and the images with cloud and shadow coverage less than 10% are determined as valid images. Basic radiation calibration, atmospheric correction and image stitching and fusion processing are performed; in the case where the cloud influence is serious and the valid images cannot fully cover the proposed study area, Sentinel satellite or high-resolution satellite data are downloaded as a supplement; the improved normalized difference water index (MNDWI) is calculated for the remote sensing images after basic processing, as shown in formula (3):

[0101]

[0102] Among them, Green represents the green light band; MIR represents the mid-infrared band.

[0103] Step 104, based on the historical records of the multiple water areas of the reservoir, the water level-area relationship curve of the reservoir is corrected, and the water area of ​​the reservoir at the end of the preset time period is determined based on the corrected water level-area relationship curve of the reservoir.

[0104] In an embodiment of the present invention, a quadratic fitting correction of the reservoir water level-area function can be performed based on multiple water areas of the reservoir and corresponding characteristic water level record values ​​recorded in the history to obtain a corrected water level-area relationship curve of the reservoir, so that the water area of ​​the reservoir at the end of a preset time period can be determined based on the water level-area relationship curve of the reservoir.

[0105] In one embodiment of the present invention, a water level-area relationship curve of a reservoir is corrected according to multiple water areas of a reservoir recorded in history, and the water area of ​​the reservoir at the end of a preset period is determined according to the water level-area relationship curve of the corrected reservoir, including: obtaining the water level value of the reservoir in each second characteristic period; correcting the original water level-area relationship curve of the reservoir according to the water area and water level value of the reservoir in each second characteristic period to obtain the water level-area relationship curve of the corrected reservoir; obtaining the inflow, outflow, runoff inflow, water withdrawal and evaporation depth of the reservoir in the preset period; determining the water level change in the preset period according to the inflow, outflow, runoff inflow, water withdrawal and evaporation depth of the reservoir in the preset period; determining the water level value at the end of the preset period according to the water level value of the reservoir at the initial moment of the preset period and the water level change in the preset period; substituting the water level value at the end of the preset period into the water level-area relationship curve of the corrected reservoir to obtain the water area of ​​the reservoir at the end of the preset period.

[0106] In the embodiment of the present invention, the water level value of each reservoir in the second characteristic period can be obtained first; according to the water area and water level value of each reservoir in the second characteristic period, the water level-area relationship curve of the corrected reservoir is obtained by fitting and correction, and then the reservoir inflow, outflow, runoff inflow, water withdrawal and evaporation depth in the preset period are obtained; according to the reservoir inflow, outflow, runoff inflow, water withdrawal and evaporation depth in the preset period, the water level change in the preset period is determined, as shown in formula (4):

[0107]

[0108] in, is the change in reservoir water level during the preset period t; Q 入t represents the reservoir inflow during period t; Q 出t represents the outflow of the reservoir during period t; R 区间t E is the flow inflow during time period t; t U is the evaporation depth of the time period; t Represents the amount of water withdrawn from the reservoir during period t.

[0109] Furthermore, the water level value at the end of the preset period can be determined according to the reservoir water level value at the initial moment of the preset period and the water level change during the preset period, as shown in formula (5):

[0110]

[0111] Among them, S t represents the reservoir water area at the end of period t; f(*) represents the reservoir water level-area curve; D t-1 Indicates the reservoir water level value at the initial calculation moment.

[0112] like Figure 4 , shows a schematic diagram of a water area-water level relationship curve provided by an embodiment of the present invention, the solid line is the corrected water level relationship curve, and the dotted line is the original water level relationship curve, that is, the water level relationship curve of the original design of the reservoir construction without considering the influence of siltation, slope changes, etc.

[0113] The reservoir water level change during the preset period t can be substituted into the corrected reservoir water level-area relationship curve to obtain the reservoir water area at the end of the preset period.

[0114] Step 105, determining the evaporation loss of the reservoir in the preset period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period.

[0115] In the embodiment of the present invention, the evaporation loss of the reservoir in the preset period can be determined according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period.

[0116] In one embodiment of the present invention, the evaporation loss of the reservoir in a preset period is determined according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period, including: determining the evaporation water depth value of the reservoir in the preset period according to the average evaporation rate; determining the evaporation loss of the reservoir in the preset period according to the evaporation water depth value and the water area of ​​the reservoir at the end of the preset period.

[0117] In the embodiment of the present invention, the evaporation depth value of the reservoir in the preset period can be calculated according to the average evaporation rate. After the evaporation depth value is calculated, the evaporation loss amount of the reservoir in the preset period can be determined according to the evaporation depth value and the reservoir water area at the end of the preset period, as shown in formula (6):

[0118]

[0119] Among them, E 水量t E represents the amount of water lost by evaporation from the reservoir during period t; 水深ti S represents the evaporation depth calculated by meteorological station i at time t; ti Represents the control area of ​​meteorological station i at time t.

[0120] Step 106, determining the amount of power generated by the water resources lost in the reservoir due to evaporation based on the evaporation loss of the reservoir during a preset period of time.

[0121] In one embodiment of the present invention, the amount of power generation of hydropower resources lost in the reservoir due to evaporation is determined based on the evaporation loss of the reservoir in a preset period of time, including: obtaining the overflow flow of the reservoir hydropower station at the initial moment of the preset period, and the difference between the water surface of the reservoir and the water head of the turbine at the initial moment; determining the amount of power generation of hydropower resources lost in the reservoir due to evaporation based on the overflow flow of the reservoir hydropower station at the initial moment, the difference between the water surface of the reservoir and the water head of the turbine at the initial moment, and the evaporation water depth value of the reservoir in the preset period of time.

[0122] In the embodiment of the present invention, after calculating the evaporation loss of the reservoir in the preset period, the flow rate of the reservoir hydropower station at the initial moment in the preset period and the difference between the reservoir water surface and the turbine head at the initial moment can be obtained first, and then the hydropower generation of the reservoir due to evaporation is determined according to the flow rate of the reservoir hydropower station at the initial moment, the difference between the reservoir water surface and the turbine head at the initial moment, and the evaporation depth value of the reservoir in the preset period, as shown in formula (7):

[0123]

[0124] in, represents the amount of hydropower resources lost due to evaporation; t represents time; K represents the water energy conversion efficiency of the turbine; g represents the acceleration of gravity; q0 represents the flow rate of the reservoir hydropower station at the initial moment; h0 represents the difference between the reservoir water surface and the turbine head at the initial moment; E 水量 Indicates the amount of water lost by evaporation, E 水深 Indicates the evaporation water depth.

[0125] like Figure 5 , shows a schematic diagram of power generation of a hydropower station provided by an embodiment of the present invention, w1 on the left is the power generation corresponding to the evaporation loss not considered, w2 on the right is the power generation corresponding to the evaporation loss considered, w1-w2 is the power generation of water energy resources due to evaporation loss.

[0126] The invention discloses a quantification method for water energy resource loss caused by evaporation, which can obtain meteorological information and water temperature information of multiple points in a preset time period of a reservoir; determine the average evaporation rate of the reservoir in the preset time period according to the meteorological information and water temperature information of the multiple points; obtain the water storage and discharge conditions recorded in the history of the reservoir, and determine multiple water areas of the reservoir recorded in the history according to the water storage and discharge conditions recorded in the history; correct the water level-area relationship curve of the reservoir according to the multiple water areas of the reservoir recorded in the history, and determine the water area of ​​the reservoir at the end of the preset time period according to the corrected water level-area relationship curve of the reservoir; determine the evaporation loss of the reservoir in the preset time period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset time period; determine the water energy resource power generation lost by the reservoir due to evaporation according to the evaporation loss of the reservoir in the preset time period; the invention can realize accurate estimation of the evaporation loss of the reservoir and the water energy resource power generation by comprehensively utilizing meteorological information, water temperature information, water storage and discharge conditions and water area data, and provide scientific support for water resource management and hydropower station operation; the invention can monitor and analyze the evaporation loss in real time, provide early warning for extreme weather events such as drought, help formulate emergency response measures, and reduce disaster losses.

[0127] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0128] Reference Figure 2 , shows a structural block diagram of a device for quantifying water energy resource loss caused by evaporation provided by an embodiment of the present invention, which may specifically include the following modules:

[0129] The acquisition module 201 is used to acquire the meteorological information and water temperature information of each point in the reservoir within a preset period of time.

[0130] The rate determination module 202 is used to determine the average evaporation rate of the reservoir in a preset time period according to the meteorological information and water temperature information of each point;

[0131] The first area determination module 203 is used to obtain the water storage and release conditions recorded in the historical records of the reservoir, and determine the multiple water areas of the reservoir recorded in the historical records according to the water storage and release conditions recorded in the historical records;

[0132] A second area determination module 204 is used to correct the water level-area relationship curve of the reservoir according to the multiple water areas of the reservoir recorded in the history, and determine the water area of ​​the reservoir at the end of the preset time period according to the corrected water level-area relationship curve of the reservoir;

[0133] The loss amount determination module 205 is used to determine the evaporation loss amount of the reservoir in the preset period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period;

[0134] The power generation determination module 206 is used to determine the power generation of the water energy resources lost due to evaporation in the reservoir according to the evaporation loss of the reservoir in a preset period of time.

[0135] The invention discloses a device for quantifying water energy resource loss caused by evaporation, which can obtain meteorological information and water temperature information of multiple points in a preset time period of a reservoir; determine the average evaporation rate of the reservoir in the preset time period according to the meteorological information and water temperature information of the multiple points; obtain the water storage and discharge conditions recorded in the history of the reservoir, and determine multiple water areas of the reservoir recorded in the history according to the water storage and discharge conditions recorded in the history; correct the water level-area relationship curve of the reservoir according to the multiple water areas of the reservoir recorded in the history, and determine the water area of ​​the reservoir at the end of the preset time period according to the corrected water level-area relationship curve of the reservoir; determine the evaporation loss of the reservoir in the preset time period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset time period; determine the water energy resource power generation lost by the reservoir due to evaporation according to the evaporation loss of the reservoir in the preset time period; the invention can realize accurate estimation of the evaporation loss of the reservoir and the water energy resource power generation by comprehensively utilizing meteorological information, water temperature information, water storage and discharge conditions and water area data, and provide scientific support for water resource management and hydropower station operation; the invention can monitor and analyze the evaporation loss in real time, provide early warning for extreme weather events such as drought, help formulate emergency response measures, and reduce disaster losses.

[0136] In one embodiment of the present invention, the rate determination module includes:

[0137] The first determination submodule is used to determine the evaporation rate of the characteristic points in the reservoir according to the meteorological information and water temperature information of multiple points;

[0138] The first acquisition submodule is used to obtain the longitude and latitude information of multiple meteorological stations within the reservoir;

[0139] The second determination submodule is used to determine the reservoir area controlled by each meteorological station according to the latitude and longitude information of each meteorological station;

[0140] The third determination submodule is used to determine the average evaporation rate of the reservoir according to the evaporation rate of the characteristic points, the reservoir area controlled by each meteorological station, and the total area of ​​the reservoir.

[0141] In one embodiment of the present invention, the second determining submodule includes:

[0142] Determine the unit used to obtain the vector range of the reservoir, perform Thiessen polygon division based on the vector range of the reservoir and the latitude and longitude information of each meteorological station, and obtain the reservoir area controlled by each meteorological station

[0143] In one embodiment of the present invention, the first area determination module includes:

[0144] A characteristic time period determination submodule, configured to determine the time interval from the end of the first water storage and release to the end of the second water storage and release in the historical record as a first characteristic time period;

[0145] A second acquisition submodule is used to acquire a plurality of second characteristic time periods during which the water volume in the reservoir changes during the first characteristic time period;

[0146] A third acquisition submodule is used to acquire the remote sensing images of the plurality of second characteristic time periods;

[0147] An index determination submodule, used to determine a normalized difference water index based on the remote sensing images of the plurality of second characteristic time periods;

[0148] The fourth determination submodule is used to determine the water area of ​​the reservoir in each second characteristic time period according to the normalized difference water body index.

[0149] In one embodiment of the present invention, the second area determination module includes:

[0150] The fourth acquisition submodule is used to obtain the water level value of the reservoir in each second characteristic period;

[0151] A fitting submodule, for correcting the original water level-area relationship curve of the reservoir according to the water area and water level value of the reservoir in each second characteristic period to obtain a corrected water level-area relationship curve of the reservoir;

[0152] The fifth acquisition submodule is used to obtain the reservoir inflow, outflow, runoff inflow, water withdrawal, and evaporation depth during a preset period;

[0153] The variation determination submodule is used to determine the water level variation during the preset period according to the reservoir inflow, outflow, runoff inflow, water withdrawal, and evaporation depth during the preset period;

[0154] A fifth determination submodule, used to determine the water level value at the end of the preset period according to the reservoir water level value at the initial moment of the preset period and the water level change during the preset period;

[0155] The substitution submodule is used to substitute the water level value at the end of the preset time period into the water level-area relationship curve of the corrected reservoir to obtain the water area of ​​the reservoir at the end of the preset time period.

[0156] In one embodiment of the present invention, the loss amount determination module includes:

[0157] The sixth determination submodule is used to determine the evaporation water depth value of the reservoir in a preset period of time according to the average evaporation rate;

[0158] The seventh determination submodule is used to determine the evaporation loss of the reservoir in a preset period of time according to the evaporation water depth value and the reservoir water area at the end of the preset period of time.

[0159] In one embodiment of the present invention, the power generation determination module includes:

[0160] The sixth acquisition submodule is used to obtain the flow rate of the reservoir and the hydropower station at the initial moment in the preset time period, and the difference between the reservoir water surface and the turbine head at the initial moment;

[0161] The eighth determination submodule is used to determine the amount of power generated by water resources lost due to evaporation in the reservoir based on the overflow flow of the reservoir hydropower station at the initial moment, the difference between the reservoir water surface and the turbine head at the initial moment, and the evaporation water depth value of the reservoir during a preset period.

[0162] The invention discloses a device for quantifying water energy resource loss caused by evaporation, which can obtain meteorological information and water temperature information of multiple points in a preset time period of a reservoir; determine the average evaporation rate of the reservoir in the preset time period according to the meteorological information and water temperature information of the multiple points; obtain the water storage and discharge conditions recorded in the history of the reservoir, and determine multiple water areas of the reservoir recorded in the history according to the water storage and discharge conditions recorded in the history; correct the water level-area relationship curve of the reservoir according to the multiple water areas of the reservoir recorded in the history, and determine the water area of ​​the reservoir at the end of the preset time period according to the corrected water level-area relationship curve of the reservoir; determine the evaporation loss of the reservoir in the preset time period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset time period; determine the water energy resource power generation lost by the reservoir due to evaporation according to the evaporation loss of the reservoir in the preset time period; the invention can realize accurate estimation of the evaporation loss of the reservoir and the water energy resource power generation by comprehensively utilizing meteorological information, water temperature information, water storage and discharge conditions and water area data, and provide scientific support for water resource management and hydropower station operation; the invention can monitor and analyze the evaporation loss in real time, provide early warning for extreme weather events such as drought, help formulate emergency response measures, and reduce disaster losses.

[0163] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0164] An embodiment of the present invention further provides an electronic device, including:

[0165] The invention comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, each process of the embodiment of the method for quantifying the loss of water energy resources due to evaporation is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0166] An embodiment of the present invention further provides a non-volatile readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, each process of the above-mentioned method for quantifying water energy resource loss caused by evaporation is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0167] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0168] It will be appreciated by those skilled in the art that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0169] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0170] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0171] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0172] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0173] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0174] The above is a detailed introduction to a method, device, equipment and storage medium for quantifying water energy resource loss caused by evaporation provided by the present invention. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for quantifying water energy resource loss due to evaporation, characterized in that: include: Obtain meteorological information and water temperature information at multiple points in the reservoir within a preset period of time; Determine the average evaporation rate of the reservoir during a preset time period based on the meteorological information and water temperature information of the multiple points; Obtain the water storage and release conditions of the reservoir history records, and determine multiple water areas of the reservoir history records based on the water storage and release conditions of the reservoir history records; According to the multiple water areas of the reservoir recorded in the history, the water level-area relationship curve of the reservoir is corrected, and the water area of ​​the reservoir at the end of the preset time period is determined according to the corrected water level-area relationship curve of the reservoir; Determine the evaporation loss of the reservoir in the preset period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period; Based on the evaporation loss of the reservoir during a preset period, the amount of power generated by the reservoir's hydropower resources due to evaporation is determined.

2. The method according to claim 1, characterized in that Determining the average evaporation rate of the reservoir during a preset time period according to the meteorological information and water temperature information of the multiple points includes: Determining the evaporation rate of the characteristic points in the reservoir according to the meteorological information and water temperature information of the plurality of points; Obtain the latitude and longitude information of multiple meteorological stations within the reservoir; Determine the reservoir area controlled by each meteorological station according to the latitude and longitude information of each meteorological station; The average evaporation rate of the reservoir is determined based on the evaporation rate of the characteristic points, the reservoir area controlled by each meteorological station, and the total area of ​​the reservoir.

3. The method according to claim 2, characterized in that Determining the reservoir area controlled by each meteorological station according to the latitude and longitude information of each meteorological station includes: The vector range of the reservoir is obtained, and Thiessen polygon division is performed according to the vector range of the reservoir and the longitude and latitude information of each meteorological station to obtain the reservoir area controlled by each meteorological station.

4. The method according to claim 1, characterized in that: The method of determining the multiple water areas of the reservoir recorded in the historical records based on the water storage and release conditions in the historical records includes: Determine the time interval from the end of the first water storage and release to the end of the second water storage and release in the historical record as the first characteristic time period; Acquire a plurality of second characteristic time periods during which the amount of water in the reservoir changes during the first characteristic time period; Acquiring remote sensing images of the plurality of second characteristic time periods; Determining a normalized difference water index based on the remote sensing images of the plurality of second characteristic time periods; The water area of ​​the reservoir in each second characteristic time period is determined according to the normalized difference water body index.

5. The method according to claim 4, characterized in that The method of correcting the water level-area relationship curve of the reservoir according to the multiple water areas of the reservoir recorded in the history, and determining the water area of ​​the reservoir at the end of the preset time period according to the corrected water level-area relationship curve of the reservoir, comprises: Obtain the water level value of the reservoir in each second characteristic period; According to the water area and water level value of the reservoir in each second characteristic period, the original water level-area relationship curve of the reservoir is corrected to obtain a corrected water level-area relationship curve of the reservoir; Obtain the reservoir inflow, outflow, runoff inflow, water withdrawal, and evaporation depth for a preset period of time; Determine the water level change during the preset period according to the reservoir inflow, outflow, runoff inflow, water withdrawal, and evaporation depth during the preset period; Determine the water level value at the end of the preset period according to the reservoir water level value at the initial moment of the preset period and the water level change during the preset period; The water level value at the end of the preset time period is substituted into the water level-area relationship curve of the corrected reservoir to obtain the water area of ​​the reservoir at the end of the preset time period.

6. The method according to claim 1, characterized in that Determining the evaporation loss of the reservoir during the preset period according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period includes: Determining the evaporation depth of the reservoir in a preset period of time according to the average evaporation rate; The evaporation loss of the reservoir during the preset period is determined according to the evaporation water depth value and the water area of ​​the reservoir at the end of the preset period.

7. The method according to claim 6, characterized in that Determining the amount of hydropower resources power generation lost by evaporation in the reservoir according to the evaporation loss of the reservoir in the preset period includes: Obtain the flow rate of the reservoir and hydropower station at the initial moment in the preset time period, and the difference between the reservoir water surface and the turbine head at the initial moment; The amount of power generated by the hydropower station due to evaporation in the reservoir is determined based on the flow rate of the reservoir at the initial moment, the difference between the water surface of the reservoir and the water head of the turbine at the initial moment, and the evaporation depth value of the reservoir during a preset period of time.

8. A device for quantifying water energy resource loss due to evaporation, characterized in that: include: An acquisition module is used to obtain meteorological information and water temperature information at each point in the reservoir within a preset period of time; A rate determination module, used to determine the average evaporation rate of the reservoir in a preset time period according to the meteorological information and water temperature information of each point; The first area determination module is used to obtain the water storage and release conditions of the reservoir history records, and determine multiple water areas of the reservoir history records according to the water storage and release conditions of the historical records; A second area determination module is used to correct the water level-area relationship curve of the reservoir according to the multiple water areas of the reservoir recorded in the history, and determine the water area of ​​the reservoir at the end of the preset time period according to the corrected water level-area relationship curve of the reservoir; A loss amount determination module, used to determine the evaporation loss amount of the reservoir in a preset period of time according to the average evaporation rate and the water area of ​​the reservoir at the end of the preset period of time; The power generation determination module is used to determine the power generation of the water energy resources lost in the reservoir due to evaporation according to the evaporation loss of the reservoir in a preset period of time.

9. An electronic device, characterized in that: include: A processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the method for quantifying the loss of water energy resources due to evaporation as described in any one of claims 1 to 7 are implemented.

10. A non-volatile readable storage medium, characterized in that: The non-volatile readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for quantifying the loss of water energy resources due to evaporation as described in any one of claims 1 to 7 are implemented.

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