Method and device for determining sediment regulation and control scheme of cascade reservoir under drainage condition

Abstract

The embodiment of the invention provides a method and device for determining a sediment regulation and control scheme of a cascade reservoir under the drainage condition, electronic equipment, a computer readable storage medium and a computer program product. The method for determining the sediment regulation and control scheme of the cascade reservoir under the drainage condition comprises the following steps: acquiring basic information and actual measurement information of each associated reservoir in a target cascade reservoir system; on the basis of a preset drainage sequence scheduling mode, the basic information and the actual measurement information, utilizing a preset reservoir sediment erosion and deposition calculation model to predict the accumulated deposition amount of the target cascade reservoir system in a future preset time period and adjust the reservoir capacity deposition amount; and determining a target drainage sequence scheduling mode in the preset drainage sequence scheduling modes based on the accumulated deposition amount and the adjusted reservoir capacity deposition amount, and taking the target drainage sequence scheduling mode as a sediment regulation and control scheme of the target cascade reservoir system. By utilizing the method disclosed by the embodiment of the invention, the sediment deposition space distribution among the reservoirs in the cascade reservoirs can be more balanced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water conservancy projects, and particularly to a method, device, electronic device, computer-readable storage medium, and computer program product for determining a sediment regulation scheme for cascade reservoirs under water discharge conditions. Background Art

[0002] A cascade reservoir system refers to a system of multiple reservoirs built in a stepped layout within the same river or basin. These reservoirs form an organic whole through series or parallel connection, aiming to achieve the multi-objective comprehensive development of water resources, including functions such as power generation, flood control, irrigation, shipping, and ecological water replenishment.

[0003] Sediment deposition can bring many adverse effects to cascade reservoirs. For example, the deposited sediment occupies the effective regulating storage capacity, thereby weakening the reservoir's regulating ability, and further leading to a reduction in comprehensive benefits such as flood control, power generation, and water supply. Another example is that sediment enters the generator set, and the high-sediment-laden water flow causes compound damage of cavitation and abrasion to the flow-through components when passing through the turbine channel; or, sediment enters the water intake, which may cause problems such as blockage of the water intake structure.

[0004] In response to the above problems, the solutions of the prior art mainly involve traditional water and sediment regulation, cascade joint regulation, and auxiliary sediment removal.

[0005] However, the existing technology solutions currently cannot solve the problem of uneven spatial distribution of sediment deposition among the reservoirs in the cascade reservoir. Summary of the Invention

[0006] To solve the above technical problems, the present disclosure proposes a solution. Embodiments of the present disclosure provide a method, device, electronic device, computer-readable storage medium, and computer program product for determining a sediment regulation scheme for cascade reservoirs under water discharge conditions.

[0007] According to the first aspect of the embodiments of the present disclosure, a method for determining a sediment regulation scheme for cascade reservoirs under water discharge conditions is provided. The method includes: obtaining the basic information and measured information of each reservoir associated with the target cascade reservoir system; where the target cascade reservoir system is a cascade reservoir system that needs to perform sediment regulation, and the target cascade reservoir system includes at least two target reservoirs cascaded along the associated water system; based on a preset water discharge order scheduling method, the basic information, and the measured information, using a preset reservoir sediment erosion and deposition calculation model, predicting the cumulative deposition volume and the deposition volume of the regulating storage capacity of the target cascade reservoir system within a preset future time period; based on the cumulative deposition volume and the deposition volume of the regulating storage capacity, determining a target water discharge order scheduling method in the preset water discharge order scheduling method as the sediment regulation scheme for the target cascade reservoir system.

[0008] According to a second aspect of the embodiments of the present disclosure, there is provided a device for determining a sediment regulation scheme of cascade reservoirs during water discharge. The device includes: a data acquisition unit configured to acquire basic information and measured information of each reservoir associated with a target cascade reservoir system, where the target cascade reservoir system is a cascade reservoir system that needs sediment regulation and includes at least two target reservoirs cascaded along an associated water system; a sediment accumulation calculation unit configured to predict the cumulative sediment accumulation and the sediment accumulation in the regulating storage capacity of the target cascade reservoir system within a preset future time period by using a preset reservoir sediment erosion and deposition calculation model based on a preset water discharge order scheduling method, the basic information, and the measured information; and a comparison and selection unit configured to determine a target water discharge order scheduling method as the sediment regulation scheme of the target cascade reservoir system based on the cumulative sediment accumulation and the sediment accumulation in the regulating storage capacity.

[0009] According to a third aspect of the embodiments of the present disclosure, there is provided an electronic device, which includes: a processor; and a memory for storing executable instructions executable by the processor, where the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method for determining a sediment regulation scheme of cascade reservoirs during water discharge according to the present disclosure.

[0010] According to a fourth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium storing a computer program for executing the method for determining a sediment regulation scheme of cascade reservoirs during water discharge according to the present disclosure.

[0011] According to a fifth aspect of the embodiments of the present disclosure, there is provided a computer program product including a computer program, where the computer program, when executed by a processor, implements the method for determining a sediment regulation scheme of cascade reservoirs during water discharge according to the present disclosure.

[0012] In summary, by using the method for determining a sediment regulation scheme of cascade reservoirs during water discharge provided by the embodiments of the present disclosure, model prediction based on data is adopted, and quantifiable indicators are used as screening conditions to screen out an optimal sediment regulation scheme from multiple preset water discharge order scheduling methods, thereby providing technical support for the sediment regulation of the target cascade reservoir system in a future period.

[0013] In addition, by implementing the described preferably sediment regulation scheme, on the one hand, the spatial distribution of sediment deposition among the reservoirs in the cascade reservoir can be made more balanced. Specifically, more sediment is distributed to the upstream reservoirs with large storage capacity and strong sediment interception ability, avoiding premature siltation and abandonment of the downstream reservoirs with small storage capacity; that is, without changing the total cumulative sediment deposition amount of the cascade reservoir, the spatial distribution of sediment in the cascade reservoir is optimized. On the other hand, since the total sediment deposition amount in the regulating storage capacity is minimized, it also means that the total loss of the regulating storage capacity can be reduced, thereby extending the life of the regulating storage capacity and enhancing the flood control and power generation benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] By describing the embodiments of the present disclosure in more detail in conjunction with the accompanying drawings, the above and other objects, features, and advantages of the present disclosure will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure, and do not constitute a limitation to the present disclosure. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0015] Figure 1 is a schematic flowchart of a method for determining a sediment regulation scheme of a cascade reservoir under a water discharge condition provided by an exemplary embodiment of the present disclosure;

[0016] Figure 2 is a schematic distribution diagram of the target cascade reservoir system provided by an exemplary embodiment of the present disclosure;

[0017] Figure 3 is the present disclosure Figure 1 An exemplary flowchart of a method for determining a sediment regulation scheme of a cascade reservoir under a water discharge condition provided by an embodiment of the present disclosure;

[0018] Figure 4 is the present disclosure Figure 1 Another exemplary flowchart of a method for determining a sediment regulation scheme of a cascade reservoir under a water discharge condition provided by an embodiment of the present disclosure;

[0019] Figure 5 is the present disclosure Figure 1 Yet another exemplary flowchart of a method for determining a sediment regulation scheme of a cascade reservoir under a water discharge condition provided by an embodiment of the present disclosure;

[0020] Figure 6a ]>is a schematic comparison waveform diagram of the cumulative sediment deposition process in the Wudongde Reservoir area under different water discharge orders in an exemplary scenario embodiment of the present disclosure;

[0021] Figure 6b is a schematic comparison waveform diagram of the cumulative sediment deposition process in the Baihetan Reservoir area under different water discharge orders in an exemplary scenario embodiment of the present disclosure;

[0022] Figure 6cIt is a schematic waveform diagram for comparing the cumulative sedimentation processes in the reservoir area of the Xiluodu Reservoir under different water release sequences in an exemplary scenario embodiment of the present disclosure;

[0023] Figure 6d It is a schematic waveform diagram for comparing the cumulative sedimentation processes in the reservoir area of the Xiangjiaba Reservoir under different water release sequences in an exemplary scenario embodiment of the present disclosure;

[0024] Figure 7 It is a schematic structural diagram of a device for determining a sediment regulation scheme for cascade reservoirs under water release conditions provided by an exemplary embodiment of the present disclosure;

[0025] Figure 8 It is a schematic structural diagram of an application embodiment of an electronic device of the present disclosure. Detailed implementation manners

[0026] The present disclosure will be further described below in conjunction with the embodiments shown in the drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. It should be understood that the present disclosure is not limited by the exemplary embodiments described herein.

[0027] It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present disclosure.

[0028] Those skilled in the art can understand that terms such as "first", "second", etc. in the embodiments of the present disclosure are only used to distinguish different steps, devices or modules, etc., and neither represent any specific technical meaning nor indicate an inevitable logical order between them.

[0029] It should also be understood that in the embodiments of the present disclosure, "a plurality" may refer to two or more, and "at least one" may refer to one, two or more.

[0030] It should also be understood that for any component, data or structure mentioned in the embodiments of the present disclosure, without clear limitation or contrary indication in the context, it can generally be understood as one or more.

[0031] In addition, the term "and / or" in the present disclosure is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present disclosure generally represents an "or" relationship between the associated objects before and after.

[0032] It should also be understood that the present disclosure emphasizes the differences between the various embodiments, and the same or similar parts can be referred to each other. For the sake of brevity, they will not be described one by one.

[0033] Meanwhile, it should be understood that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present disclosure, its application, or its use.

[0035] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0036] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0037] The following combines Figures 1 to 8 to describe the method, device, electronic device, computer-readable storage medium, and computer program product for determining the sediment regulation scheme of cascade reservoirs under the condition of water discharge in the present disclosure.

[0038] Exemplary Method

[0039] Figure 1 is a schematic flow chart of the method for determining the sediment regulation scheme of cascade reservoirs under the condition of water discharge provided by an exemplary embodiment of the present disclosure. The method can be executed on the server side; the server side can include, but is not limited to, a server, a cloud computing platform.

[0040] Specifically, referring to Figure 1 the method for determining the sediment regulation scheme of cascade reservoirs under the condition of water discharge includes:

[0041] S110. Obtain the basic information and measured information of each reservoir associated in the target cascade reservoir system.

[0042] Wherein, the target cascade reservoir system is a cascade reservoir system that needs to carry out sediment regulation, and the target cascade reservoir system includes at least two target reservoirs cascaded along the associated water system.

[0043] Wherein, as the execution subject of step S110, the server side can "obtain" the basic information and measured information of each reservoir associated in the target cascade reservoir system in any feasible manner. For example, the server side can communicate with the data acquisition terminal to obtain the measured information. Another example is that the server side can communicate with the data storage server side to obtain the basic information.

[0044] Among them, it should be noted that the present disclosure does not limit the communication method. For example, it may include but is not limited to wireless communication, and the wireless communication may include, for example, mobile networks, WI-FI, etc.

[0045] As an optional implementation manner, the basic information at least includes the storage capacity associated with the target reservoir, the normal storage level, the dead storage level, the flood control limited water level, and the water level operation mode.

[0046] As an optional implementation manner, the measured information at least includes the measured flow rate, sediment concentration, sediment transport volume, and scouring and silting data associated with the target reservoir.

[0047] S120. Based on the preset discharge order scheduling method, the basic information, and the measured information, using the preset reservoir sediment scouring and silting calculation model, predict the cumulative siltation volume and the regulating reservoir siltation volume of the target cascade reservoir system within a preset future time period.

[0048] As an optional implementation manner, the preset discharge order scheduling method may include a first-level scheduling strategy and a second-level scheduling strategy that are executed sequentially.

[0049] Specifically, as an optional example, the first-level scheduling strategy includes: based on the number of target reservoirs included in the target cascade reservoir system and the central symmetry division principle, in the direction of spreading from the center to the periphery, successively determine pairs of target reservoir groups. Wherein, the center is the geometric center of the cascade reservoir, and the priority of the discharge order of the target reservoir group pairs is negatively correlated with the distance of the target reservoir from the geometric center.

[0050] As another optional example, the second-level scheduling strategy includes: for each pair of target reservoir groups, two target reservoirs discharge water simultaneously along the cascade order; for each pair of target reservoir groups, the target reservoir in the upper reaches discharges water first and the target reservoir in the lower reaches discharges water later along the cascade order; for each pair of target reservoir groups, the target reservoir in the lower reaches discharges water first and the target reservoir in the upper reaches discharges water later along the cascade order.

[0051] Among them, it should be noted that in the above implementation manner, the first-level scheduling strategy and the second-level scheduling strategy that are executed sequentially mean that a combination of one of the first-level scheduling strategy and the second-level scheduling strategy forms an entirety as a kind of the "preset discharge order scheduling method".

[0052] For ease of understanding the above "first-level scheduling strategy and second-level scheduling strategy that are executed sequentially", reference may be made to Figure 2 and the following exemplary description:

[0053] Suppose that in the target cascade reservoir system, there are four reservoirs, namely A1 (the first cascade), A2 (the second cascade), A3 (the third cascade), and A4 (the fourth cascade), which are distributed in series along a certain river basin (in the upstream - to - downstream direction); and the connection lines of the four reservoirs can be approximated as straight - line segments (where A1 is the starting point and A4 is the ending point), then the geometric center can be considered as the mid - point M of the straight - line segment. Based on the above - mentioned assumption conditions, by implementing the above - mentioned primary scheduling strategy, it can be determined that A2 and A3 can be used as a group of target reservoir pairs, denoted as B1; A1 and A4 can be used as another group of target reservoir pairs, denoted as B2. Since the reservoirs A2 and A3 in B1 are closer to the geometric center M compared to B2, the priority of the water - discharging order of B1 is higher than that of B2. Next, take B1 as an example to describe the situation of implementing the secondary scheduling strategy. Specifically, for the case of "two target reservoirs discharging water simultaneously", that is, A2 and A3 discharge water simultaneously. For the case of "along the cascade order, the target reservoir in the upstream discharges water first, and the target reservoir in the downstream discharges water later", that is, A2 discharges water first and A3 discharges water later. For the case of "along the cascade order, the target reservoir in the downstream discharges water first, and the target reservoir in the upstream discharges water later", that is, A2 discharges water later and A3 discharges water first.

[0054] As an alternative implementation manner, the preset reservoir sedimentation and erosion calculation model may include: an empirical model based on the laws of reservoir water - storage sediment - flushing and open - spill sediment - flushing, and / or a hydrodynamic model based on the principles of hydrodynamics.

[0055] It should be noted that the empirical model can be directly constructed by referring to engineering sediment design manuals, etc.; the hydrodynamic model can be applied after parameter calibration and verification. In the preparation stage of the present disclosure solution, technicians can flexibly select the above two models according to the information and model situations they have mastered.

[0056] In addition, it should be explained that the present disclosure does not limit the specific duration of the future preset time period. For example, it can be 50 years, 100 years.

[0057] The cumulative sedimentation amount refers to the total amount by which the effective storage capacity of the reservoir decreases due to sediment deposition during a specific time period. The sedimentation amount in the regulating storage capacity refers to the total amount by which the effective storage capacity decreases due to the long - term accumulation of sediments such as silt within the regulating storage capacity range of the reservoir (i.e., between the normal storage level and the dead storage level). Both are core indicators for measuring the degree of reservoir sedimentation.

[0058] As an alternative implementation manner, referring to Figure 3 , step S120 may include the following steps:

[0059] S1210. In the case of implementing each of the secondary scheduling strategies, based on the basic information and the measured information, use a preset reservoir sediment scouring and silting calculation model to calculate the cumulative siltation volume and the regulating storage siltation volume of each target reservoir matching each secondary scheduling strategy within a preset future time period.

[0060] Further, as an optional example, referring to Figure 4 , step S1210 may include the following steps:

[0061] S12101. Based on a preset screening rule, determine a benchmark strategy and at least one alternative strategy among the secondary scheduling strategies.

[0062] Optionally, referring to the corresponding part of the foregoing embodiment, for example, the strategy of "for each pair of target reservoir groups, along the cascade order, two target reservoirs discharge water simultaneously" may be used as the benchmark strategy.

[0063] Then, take "for each pair of target reservoir groups, along the cascade order, the target reservoir in the upper reaches discharges water first, and the target reservoir in the lower reaches discharges water later" and "for each pair of target reservoir groups, along the cascade order, the target reservoir in the lower reaches discharges water first, and the target reservoir in the upper reaches discharges water later" as alternative strategies respectively.

[0064] S12102. In the case of implementing the benchmark strategy, based on the basic information and the measured information, use a preset reservoir sediment scouring and silting calculation model to calculate the cumulative benchmark siltation volume and the regulating storage benchmark siltation volume of each target reservoir within a preset future time period.

[0065] Specifically, for each target reservoir, S12102 can be implemented in the following manner:

[0066] Step 1) Data preprocessing.

[0067] Integrate the basic information. Specifically, based on collecting the basic information such as the storage capacity curve (between the normal storage level and the dead storage level), the flood control limited water level, and the water level operation mode of each target reservoir, construct the elevation-storage capacity relationship of the regulating storage area. Integrate the river channel terrain data of the cascade reservoirs (which need to be completely connected) to form the terrain grid of the one-dimensional river network model, covering the reservoir backwater area and the regulating storage range.

[0068] Process the measured information. Specifically, input the time series data of the inflow / outflow discharge, sediment concentration, and sediment transport volume for model calibration and verification. Sort out the historical scouring and silting data (such as the cross-section siltation thickness) to correct the model parameters such as the sediment settling velocity and the sediment carrying capacity coefficient.

[0069] Step 2) Model preprocessing.

[0070] For example, a one-dimensional unsteady flow and sediment mathematical model is adopted. The core equations may include: the water flow continuity equation and the motion equation, the suspended sediment continuity equation and the riverbed deformation equation, and the bed load sediment transport rate equation (such as the Einstein formula or empirical formula).

[0071] Parameter setting and correction are carried out for the above equations. Specifically, for the calculation of sediment settling velocity, for fine sediment with a particle size < 0.02 mm, a flocculation settling velocity correction formula (activated when the sediment concentration > 0.3 kg / m 3 and the flow velocity < 0.7 m / s) is adopted. For the calculation of the sediment carrying capacity coefficient, it can be dynamically adjusted according to the recovery saturation coefficient α and the water flow conditions.

[0072] Step 3) Set boundary conditions according to the benchmark strategy.

[0073] First, synchronous treatment of cascade water discharge. Specifically, within the same calculation step length, starting from the uppermost reservoir in the cascade order, calculate the water and sediment discharge process of the upstream reservoir as the inflow boundary of the downstream reservoir. Through the connecting equations of the flow rate and water level at the bifurcation point, coordinate the flow rate distribution and water level change of synchronous water discharge to ensure the spatio-temporal consistency of water and sediment transport.

[0074] Then, treatment of sediment inflow from tributaries and the inter-basin area. Specifically, for tributaries without measured data, an inter-basin rainfall runoff and sediment transport model (hillslope sediment yield + channel sediment transport formula) is used to generate the sediment concentration entering the reservoir of the tributary. The sediment concentration of the tributary is used as the lateral input boundary and incorporated into the main stream water and sediment model.

[0075] Step 4) Dynamic scouring and silting calculation and iterative adjustment.

[0076] First, the scouring and silting volume of the cascade reservoirs can be calculated step by step with hours or days as the step length. Specifically, for the calculation of suspended sediment deposition, the change of sediment concentration along the way can be calculated through the non-equilibrium sediment transport equation, and the deposition thickness can be updated in combination with the riverbed deformation equation. For the case of bed load deposition, it can be calculated by superimposing the sediment transport rate formula and the riverbed deformation equation. Second, dynamic parameter iteration. Specifically, when the calculation result does not meet the constraints (such as the reservoir capacity loss exceeding the threshold), return to the previous time step to adjust the water discharge strategy (such as changing the flow rate distribution).

[0077] Step 5) Result output.

[0078] First, calculate the cumulative deposition volume. The deposition thickness of each cross-section and the grid area can be accumulated. The specific calculation formula is as follows:

[0079]

[0080] where, ΔZ i represents the deposition thickness of the i-th cross-section; B i represents the width of the i-th cross-section;; Denote the dry unit weight of sediment; Δx i Denote the grid area corresponding to the i-th cross-section; W 累积 Denote the cumulative sediment deposition volume.

[0081] Secondly, adjust the calculation of reservoir capacity sediment deposition. Specifically, only the sediment deposition volume between the normal storage level and the dead storage level can be calculated.

[0082] S12103. For each of the at least one alternative strategy, in the case of implementing the alternative strategy, based on the basic information and the measured information, use a preset reservoir sediment erosion and deposition calculation model to calculate the first cumulative sediment deposition volume and the first reservoir capacity sediment deposition volume of each target reservoir within a preset future time period.

[0083] It should be noted that for the case of the alternative strategy, the basic principle of calculating the "first cumulative sediment deposition volume and the first reservoir capacity sediment deposition volume" involved is similar to the corresponding case of the benchmark strategy. Therefore, the relevant implementation methods can refer to S12102 and will not be elaborated here.

[0084] S12104. In response to the implementation of the alternative strategy, use the cumulative sediment deposition benchmark volume, the reservoir capacity sediment deposition benchmark volume, the first cumulative sediment deposition volume matching the implemented alternative strategy, and the first reservoir capacity sediment deposition volume matching the implemented alternative strategy of each target reservoir within a preset future time period to determine the sediment deposition change volume and the reservoir capacity sediment deposition change volume of each target reservoir within a preset future time period.

[0085] For ease of understanding, refer to Figure 2 , taking the target reservoir A3 as an example, illustrate step S12104, where it is assumed that the preset future time period is 50 years.

[0086] Specifically, when the benchmark strategy (e.g., "for each pair of target reservoir groups, along the cascade order, two target reservoirs discharge water simultaneously") is executed, the cumulative sedimentation benchmark quantity Q1 of target reservoir A3 after 50 years and the sedimentation benchmark quantity Q2 of the regulating storage capacity can be calculated using the above step S12102. When the alternative strategy (e.g., "for each pair of target reservoir groups, along the cascade order, the target reservoir in the upper reaches discharges water first, and the target reservoir in the lower reaches discharges water later") is executed, the first cumulative sedimentation quantity P1 of target reservoir A3 after 50 years and the first sedimentation quantity P2 of the regulating storage capacity can be calculated using the above step S12103. Then, calculate the difference delta1 between the cumulative sedimentation benchmark quantity Q1 and the first cumulative sedimentation quantity P1; that is, obtain the sedimentation change quantity of the target reservoir A3 after 50 years. Similarly, calculate the difference delta2 between the sedimentation benchmark quantity Q2 of the regulating storage capacity and the first sedimentation quantity P2 of the regulating storage capacity; that is, obtain the sedimentation change quantity of the regulating storage capacity of the target reservoir A3 after 50 years.

[0087] Similarly, other target reservoirs can also be calculated by referring to the above method, so as to determine the corresponding sedimentation change quantity and sedimentation change quantity of the regulating storage capacity within the future preset time period.

[0088] As described above, through the calculation of the sedimentation change quantity and the sedimentation change quantity of the regulating storage capacity, the spatial distribution of sediment deposition in the target cascade reservoir system can be accurately quantified and analyzed; thus, according to the standard of balanced sediment distribution among the reservoirs in the target cascade reservoir system, the optimal scheduling plan in the preset water discharge order scheduling method can be judged.

[0089] S130. Based on the cumulative sedimentation quantity and the sedimentation quantity of the regulating storage capacity, determine the target water discharge order scheduling method in the preset water discharge order scheduling method as the sediment regulation plan of the target cascade reservoir system.

[0090] As an alternative implementation, referring to Figure 5 , step S130 may include the following steps:

[0091] S1310. Based on the cumulative sedimentation quantity and the sedimentation quantity of the regulating storage capacity of each target reservoir matching each secondary scheduling strategy within the future preset time period, calculate the total cumulative sedimentation quantity and the total sedimentation quantity of the regulating storage capacity of the target cascade reservoir system matching each secondary scheduling strategy within the future preset time period.

[0092] Here, with reference to the method of calculating the first cumulative sedimentation volume and the sedimentation volume of the first regulating storage capacity for the target reservoir A3 in step S12104, calculate the cumulative sedimentation volume and the sedimentation volume of the regulating storage capacity for each target reservoir in the target cascade reservoir system within a preset future time period for each of the secondary scheduling strategies; then sum up the cumulative sedimentation volumes of each target reservoir within the preset future time period for each of the secondary scheduling strategies to obtain the corresponding total cumulative sedimentation volume. Similarly, sum up the sedimentation volumes of the regulating storage capacity of each target reservoir within the preset future time period for each of the secondary scheduling strategies to obtain the total sedimentation volume of the regulating storage capacity.

[0093] S1320. In response to the deviation of each of the total cumulative sedimentation volumes matching each of the secondary scheduling strategies being less than the preset total sedimentation volume deviation threshold, determine the total sedimentation volume of the regulating storage capacity with the smallest value.

[0094] Here, optionally, the preset total sedimentation volume deviation threshold can be set according to actual engineering needs, and the present disclosure does not limit this.

[0095] Among them, optionally, the method of "determining the total sedimentation volume of the regulating storage capacity with the smallest value" can be, for example, comparing the values of the total sedimentation volumes of the regulating storage capacity corresponding to different secondary scheduling strategies calculated in step S1310, and determining the minimum value therefrom.

[0096] S1330. Based on the secondary scheduling strategy corresponding to the total sedimentation volume of the regulating storage capacity with the smallest value, determine the target drainage order scheduling method.

[0097] Among them, the target drainage order scheduling method includes the first scheduling strategy executed sequentially and the secondary scheduling strategy corresponding to the total sedimentation volume of the regulating storage capacity with the smallest value.

[0098] Specifically, assume that under the secondary scheduling strategy of "for each pair of target reservoir groups, along the cascade order, the target reservoir in the upper reaches drains first and the target reservoir in the lower reaches drains later", the total sedimentation volume of the regulating storage capacity of the target cascade reservoir system is the smallest. Then it can be determined that the combination of the primary scheduling strategy and the secondary scheduling strategy of "for each pair of target reservoir groups, along the cascade order, the target reservoir in the upper reaches drains first and the target reservoir in the lower reaches drains later" can be used as the target drainage order scheduling method.

[0099] In addition, the basic technical principle of the technical solution of the present disclosure can be summarized as follows: The difference in the water release sequence of cascade reservoirs can change the hydrodynamic conditions and sediment transport paths, thus significantly affecting the spatial distribution of sediment deposition and the reservoir capacity loss rate. The reason is that when the water level is high, the water flow is slow, and coarse sediment is likely to deposit; when the water level is low, the flow velocity is fast, and fine sediment is more likely to be eroded and transported. It can be seen from this that the water release sequence can affect the flow velocity through the water level change, and then control the particle size distribution of the deposited sediment. Specifically, if the upstream reservoir releases water in advance, the upstream reservoir will lower the water level first, while its downstream reservoir still maintains a high water storage level. At this time, when the water released from the upstream reservoir enters the downstream reservoir, due to the high water level in the downstream reservoir, the flow velocity drops sharply, and the sediment-carrying capacity of the water flow decreases suddenly, resulting in the sediment discharged from the upstream reservoir being quickly deposited near the entrance of the downstream reservoir. If the downstream reservoir releases water in advance, it will cause the water level in the downstream reservoir area to decrease, the water level gradient between the upstream and downstream to increase, the flow velocity to increase, the sediment-carrying capacity of the water flow to enhance, and the fine sediment to be transported to a farther area or even discharged out of the reservoir.

[0100] In summary, by using the method for determining the sediment regulation scheme of cascade reservoirs under water release provided by the embodiments of the present disclosure, and adopting data-based model prediction, with quantifiable indicators as screening conditions, an optimal sediment regulation scheme is screened out from multiple preset water release sequence scheduling methods; thereby providing technical support for the sediment regulation of the target cascade reservoir system in a future period.

[0101] In addition, by implementing according to the optimal sediment regulation scheme, on the one hand, it can make the spatial distribution of sediment deposition among the reservoirs in the cascade reservoir more balanced. Specifically, more sediment is distributed to the upstream reservoir with a large reservoir capacity and strong sediment interception ability, avoiding the premature siltation and abandonment of the downstream reservoir with a small reservoir capacity; that is, without changing the total cumulative sediment deposition amount of the cascade reservoir, the spatial distribution of sediment in the cascade reservoir is optimized. On the other hand, since the total sediment deposition amount in the regulating reservoir is minimized, it also means that the total loss of the regulating reservoir capacity can be reduced, thereby extending the life of the regulating reservoir capacity and enhancing the flood control and power generation benefits.

[0102] Application scenario embodiment:

[0103] The following summarizes the method for determining the sediment regulation scheme of cascade reservoirs under water release in the above embodiments of the present disclosure in combination with specific scenario examples.

[0104] The scenario is a target cascade reservoir system composed of 4 reservoirs in the lower reaches of the Jinsha River. Specifically, from upstream to downstream are the Wudongde, Baihetan, Xiluodu, and Xiangjiaba reservoirs. The reservoirs are basically connected end to end and are located at the junction of Sichuan and Yunnan provinces.

[0105] Under the above scenario, based on the foregoing embodiments of the present disclosure, the method for determining the sediment regulation scheme of cascade reservoirs under water release may include:

[0106] Step 1: Collect basic information of cascade reservoirs and measured water and sediment data.

[0107] The Wudongde and Baihetan reservoirs started discharging water in 2020 and 2021 respectively. They are the seventh and second largest hydropower stations in the world. The total storage capacity of the Wudongde Reservoir is 7.408 billion m³, the regulating storage capacity is 3.020 billion m³, and the flood control storage capacity is 2.440 billion m³. The total storage capacity of the Baihetan Reservoir is 20.627 billion m³, the regulating storage capacity is 10.436 billion m³, and the flood control storage capacity is 7.500 billion m³. The Xiluodu and Xiangjiaba hydropower stations were completed in 2015 and 2012 respectively. Xiluodu is the third largest hydropower station in the world. Currently, the normal discharging water level of the Xiluodu Reservoir is 600 m, the restricted water level during the flood season is 560 m, and the dead water level is 540 m. The normal discharging water level of the Xiangjiaba Reservoir is 380 m, and the restricted water level during the flood season and the dead water level are both 370 m. The specific parameters of each reservoir are shown in Table 1.

[0108]

[0109] Table 1 Characteristic parameters of cascade reservoirs in the lower reaches of the Jinsha River

[0110] According to the current operation regulation (i.e., water level operation mode), the discharging water sequence of the four reservoirs before the flood season is as follows: the water levels of the Baihetan and Xiluodu reservoirs drop to the dead water levels at the end of May, and the water levels of the Wudongde and Xiangjiaba reservoirs drop to the flood control restricted water levels or dead water levels at the end of June. The two reservoirs with water level reduction during the same period discharge water evenly (discharging water evenly means the two reservoirs discharge water simultaneously).

[0111] Step 2: Propose a discharging water operation plan.

[0112] Regarding the discharging water sequence problem of the above-mentioned cascade reservoirs, three comparison plans, namely "even discharge" (the current operation regulation, that is, this strategy is used as the "benchmark strategy"), "upper reservoir first, then lower reservoir", and "lower reservoir first, then upper reservoir", are designed respectively to study the influence of different discharging water sequences on the sediment deposition amounts of the four reservoirs.

[0113] Specifically, for "even discharge", that is, the water levels of the Baihetan and Xiluodu reservoirs drop to the dead water levels at the end of May, and the water levels of the Wudongde and Xiangjiaba reservoirs drop to the flood control restricted water levels or dead water levels at the end of June. The two reservoirs with water level reduction during the same period discharge water evenly. For "upper reservoir first, then lower reservoir", that is, the Baihetan discharges water first and the Xiluodu discharges water later. The water levels of the two reservoirs drop to the dead water levels before the end of May. The Wudongde discharges water first and the Xiangjiaba discharges water later. The water levels of the two reservoirs drop to the flood control restricted water levels or dead water levels before the end of June. The water discharge amounts during the same period are the same as those of the current operation regulation. For "lower reservoir first, then upper reservoir", that is, the Xiluodu discharges water first and the Baihetan discharges water later. The water levels of the two reservoirs drop to the dead water levels before the end of May. The Xiangjiaba discharges water first and the Wudongde discharges water later. The water levels of the two reservoirs drop to the flood control restricted water levels or dead water levels before the end of June. The water discharge amounts during the same period are the same as those of the current operation regulation.

[0114] Step 3: Execute calculations using the reservoir sediment erosion and deposition calculation model.

[0115] The sediment scouring and silting models of the reservoirs are used to calculate the sediment scouring and silting volumes of the four reservoirs over 100 years. Specifically, under different water release order schemes, the changes in the cumulative siltation volumes of the four reservoirs can be reflected in the waveform diagram as shown in Figures 6a to 6d ; in addition, under different water release order schemes, the data of the cumulative siltation volumes of the four reservoirs are shown in Table 2, and the siltation volumes in the regulating storage capacities of the four reservoirs are shown in Table 3.

[0116]

[0117] Table 2 Comparison of sedimentation volumes of four reservoirs under different water release orders (unit: 100 million tons)

[0118]

[0119] Table 3 Comparison of siltation volumes in the regulating storage capacities of four reservoirs under different water release orders (unit: 100 million tons)

[0120] Step Four: Scheme comparison and selection.

[0121] First of all, from the comparative analysis of the sedimentation volumes of the four reservoirs under the above different water release order schemes, it can be seen that the water release scheme from top to bottom reduces the sedimentation volumes of the two smaller reservoirs, Wudongde and Xiangjiaba, and increases the sedimentation volumes of the two larger reservoirs, Baihetan and Xiluodu; the water release scheme from bottom to top is the opposite, increasing the sedimentation volumes of the two smaller reservoirs, Wudongde and Xiangjiaba, and reducing the sedimentation volumes of the two larger reservoirs, Baihetan and Xiluodu; the total sedimentation volumes of the four reservoirs basically remain unchanged. The influence range of the water release order on the sedimentation volume is generally smaller than that of the water storage order.

[0122] Secondly, by comparing and analyzing the siltation volumes in the regulating storage capacities of the four reservoirs under different water release order schemes, it can be seen that the siltation volumes in the regulating storage capacities of the four reservoirs under the water release scheme from top to bottom are all reduced. The total cumulative siltation volume in the regulating storage capacities of the four reservoirs over 100 years is reduced by 0.10 billion tons, accounting for 5.97% of the siltation volume in the regulating storage capacity. Under the water release scheme from bottom to top, only the siltation volume in the regulating storage capacity of the Baihetan Reservoir is reduced, and the siltation volumes of the other three reservoirs increase. The total cumulative siltation volume in the regulating storage capacities of the four reservoirs over 100 years increases by 0.01 billion tons, accounting for 0.60% of the siltation volume in the regulating storage capacity.

[0123] Therefore, on the premise of meeting the flood control requirements, the upstream cascade of the cascade reservoirs releases water first appropriately, which is conducive to the balanced distribution of sediment in the cascade reservoirs, retains more regulating storage capacity, and maximizes the comprehensive benefits of the cascade reservoirs.

[0124] In summary, in the above scenario example, after applying the method for determining the sediment regulation scheme of cascade reservoirs under water release provided by the embodiments of the present disclosure, it is finally determined that the water release strategy of "releasing water from the upper reservoir first and then the lower reservoir" can be used as the preferred sediment regulation scheme for the "target cascade reservoir system composed of 4 reservoirs in the lower reaches of the Jinsha River".

[0125] Exemplary device

[0126] It should be understood that the foregoing embodiments in this text regarding the method for determining the sediment regulation plan of cascade reservoirs during water discharge can be similarly applied to the following device for determining the sediment regulation plan of cascade reservoirs during water discharge for similar expansion; for the sake of simplicity, it is not described in detail herein.

[0127] Figure 7 It is a schematic structural diagram of a device for determining the sediment regulation plan of cascade reservoirs during water discharge provided by an exemplary embodiment of the present disclosure.

[0128] Referring to Figure 7 , the device includes: a data acquisition unit 710, configured to: acquire the basic information and measured information of each reservoir associated in the target cascade reservoir system; wherein, the target cascade reservoir system is a cascade reservoir system that needs to perform sediment regulation, and the target cascade reservoir system includes at least two target reservoirs cascaded along the associated water system; a sediment accumulation calculation unit 720, configured to: based on a preset water discharge order scheduling method, the basic information and the measured information, use a preset reservoir sediment scouring and silting calculation model to predict the cumulative sediment accumulation and the sediment accumulation in the regulating reservoir capacity of the target cascade reservoir system within a preset future time period; a comparison and selection unit 730, configured to: based on the cumulative sediment accumulation and the sediment accumulation in the regulating reservoir capacity, determine a target water discharge order scheduling method in the preset water discharge order scheduling methods as the sediment regulation plan of the target cascade reservoir system.

[0129] In summary, by using the device for determining the sediment regulation plan of cascade reservoirs during water discharge provided by the embodiments of the present disclosure, based on data-based model prediction, with quantifiable indicators as screening conditions, a preferred sediment regulation plan is screened out from multiple preset water discharge order scheduling methods; thereby providing technical support for the sediment regulation of the target cascade reservoir system in a future period.

[0130] In addition, by implementing according to the preferred sediment regulation plan, on the one hand, it can make the spatial distribution of sediment accumulation among the reservoirs in the cascade reservoir more balanced. Specifically, more sediment is allocated to the upstream reservoirs with large reservoir capacity and strong sediment retention ability, avoiding the premature siltation and abandonment of the downstream reservoirs with small reservoir capacity; that is, without changing the total cumulative sediment accumulation of the cascade reservoir, the spatial distribution of sediment in the cascade reservoir is optimized. On the other hand, since the total sediment accumulation in the regulating reservoir capacity is the smallest, it means that the total loss of the regulating reservoir capacity can be reduced, thereby extending the life of the regulating reservoir capacity and improving the flood control and power generation benefits.

[0131] Exemplary electronic device

[0132] In addition, an embodiment of the present disclosure further provides an electronic device, including: a memory for storing a computer program; a processor for executing the computer program stored in the memory, and when the computer program is executed, implementing the method for determining a sediment regulation scheme of cascade reservoirs under water discharge according to any one of the above embodiments of the present disclosure.

[0133] Figure 8 FIG. is a schematic structural diagram of an application embodiment of the electronic device of the present disclosure. Next, refer to Figure 8 to describe the electronic device according to an embodiment of the present disclosure. The electronic device may be any one or both of the first device and the second device, or a stand-alone device independent of them, and the stand-alone device may communicate with the first device and the second device to receive the input signals collected from them.

[0134] As Figure 8 shown, the electronic device includes one or more processors and a memory. The processor may be a central processing unit (CPU) or other forms of processing units with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions. The memory may include one or more computer program products, and the computer program products may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage media, and the processor may run the program instructions to implement the method for determining a sediment regulation scheme of cascade reservoirs under water discharge according to various embodiments of the present disclosure described above and / or other desired functions.

[0135] In one example, the electronic device may further include: an input device and an output device, and these components are interconnected through a bus system and / or other forms of connection mechanisms (not shown). In addition, the input device may further include, for example, a keyboard, a mouse, etc. The output device may output various information to the outside, including the determined distance information, direction information, etc. The output device may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0136] Of course, for simplicity, Figure 8 only some of the components related to the present disclosure in the electronic device are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application scenarios, the electronic device may further include any other appropriate components.

[0137] In addition to the above methods and devices, an embodiment of the present disclosure may also be a computer program product, which includes computer program instructions that, when run on a processor, cause the processor to execute the steps in the method for determining a sediment regulation scheme for cascade reservoirs under flood discharge conditions according to various embodiments of the present disclosure described in the foregoing part of this specification.

[0138] The computer program product may be written in any combination of one or more programming languages for programming code to perform the operations of the embodiments of the present disclosure. The programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages. The programming code may be executed entirely on the user's computing device, partially on the user's device, executed as a stand-alone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0139] In addition, an embodiment of the present disclosure may also be a computer-readable storage medium, on which computer program instructions are stored that, when run on a processor, cause the processor to execute the steps in the method for determining a sediment regulation scheme for cascade reservoirs under flood discharge conditions according to various embodiments of the present disclosure described in the foregoing part of this specification.

[0140] The computer-readable storage medium may adopt any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may, for example, include but is not limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0141] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program may be stored in a computer-readable storage medium, and when executed, it performs the steps including the above method embodiments; and the foregoing storage medium includes: ROM, RAM, magnetic disk, or optical disk and other various media that can store program code.

[0142] The basic principles of the present disclosure have been described in connection with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of illustration and facilitating understanding, rather than limitations. The above details do not limit the present disclosure to necessarily adopt the above specific details for implementation.

[0143] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For system embodiments, since they basically correspond to method embodiments, the description is relatively simple. For related parts, reference can be made to the partial description of the method embodiments.

[0144] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present disclosure are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used herein refer to the word "and / or", and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with each other.

[0145] The methods and apparatuses of the present disclosure can be implemented in many ways. For example, the methods and apparatuses of the present disclosure can be implemented through software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of the steps for the method is only for illustration, and the steps of the method of the present disclosure are not limited to the above specific order described, unless otherwise specifically stated. In addition, in some embodiments, the present disclosure can also be implemented as a program recorded in a recording medium, and these programs include machine-readable instructions for implementing the method according to the present disclosure. Therefore, the present disclosure also covers the recording medium storing the program for executing the method according to the present disclosure.

[0146] It should also be noted that in the apparatuses, equipment, and methods of the present disclosure, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present disclosure.

[0147] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0148] The above description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present disclosure to the form disclosed herein. Although numerous example aspects and embodiments have been discussed above, those skilled in the art will recognize some of their variations, modifications, alterations, additions, and subcombinations.

Claims

1. A method for determining a sediment regulation plan of cascade reservoirs under water discharge conditions, characterized in that The method includes: Obtaining the basic information and measured information of each reservoir associated in the target cascade reservoir system; wherein, the target cascade reservoir system is a cascade reservoir system that needs to perform sediment regulation, and the target cascade reservoir system includes at least two target reservoirs cascaded along the associated water system; Based on the preset drainage order scheduling method, the basic information and the measured information, using the preset reservoir sediment scouring and silting calculation model, predicting the cumulative siltation amount and the regulated storage siltation amount of the target cascade reservoir system within a preset future time period; Based on the cumulative siltation amount and the regulated storage siltation amount, determining a target drainage order scheduling method in the preset drainage order scheduling method as the sediment regulation scheme of the target cascade reservoir system.

2. The method according to claim 1, wherein The basic information at least includes the storage capacity, normal storage level, dead storage level, flood limit water level, and water level operation mode associated with the target reservoir; The measured information at least includes the measured flow rate, sediment concentration, sediment transport volume, and scouring and silting data associated with the target reservoir.

3. The method according to claim 2, wherein The preset drainage order scheduling method includes a primary scheduling strategy and a secondary scheduling strategy that are executed sequentially; wherein The primary scheduling strategy includes: Based on the number of the target reservoirs included in the target cascade reservoir system and the central symmetry division principle, in the direction of spreading from the center to the periphery, sequentially determining target reservoir pairs; Wherein, the center is the geometric center of the cascade reservoir, and the drainage order priority of the target reservoir pair is negatively correlated with the distance of the target reservoir from the geometric center; The secondary scheduling strategy includes: For each target reservoir pair, along the cascade order, the two target reservoirs discharge water simultaneously; For each target reservoir pair, along the cascade order, the target reservoir in the upper reaches discharges water first, and the target reservoir in the lower reaches discharges water later; For each target reservoir pair, along the cascade order, the target reservoir in the lower reaches discharges water first, and the target reservoir in the upper reaches discharges water later.

4. The method according to claim 3, characterized in that, The preset reservoir sediment scouring and silting calculation model includes: An empirical model based on the law of reservoir water accumulation and sediment discharge and / or A hydrodynamic model based on the principles of hydrodynamics.

5. The method according to claim 4, characterized in that The predicting the cumulative siltation amount and the regulated storage siltation amount of the target cascade reservoir system within a preset future time period by using the preset reservoir sediment scouring and silting calculation model based on the preset drainage order scheduling method, the basic information and the measured information includes: In the case of executing each secondary scheduling strategy, based on the basic information and the measured information, using the preset reservoir sediment scouring and silting calculation model, calculating the cumulative siltation amount and the regulated storage siltation amount of each target reservoir matching each secondary scheduling strategy within a preset future time period.

6. The method according to claim 5, characterized in that, The calculating the cumulative siltation amount and the regulated storage siltation amount of each target reservoir matching each secondary scheduling strategy within a preset future time period by using the preset reservoir sediment scouring and silting calculation model based on the basic information and the measured information in the case of executing each secondary scheduling strategy includes: Determine a benchmark strategy and at least one alternative strategy in the secondary scheduling strategy based on a preset screening rule; In the case of executing the benchmark strategy, based on the basic information and the measured information, use a preset reservoir sediment scouring and silting calculation model to calculate the cumulative silting benchmark amount and the regulating storage silting benchmark amount of each target reservoir within a preset future time period; For each of the at least one alternative strategy, in the case of executing this alternative strategy, based on the basic information and the measured information, use a preset reservoir sediment scouring and silting calculation model to calculate the first cumulative silting amount and the first regulating storage silting amount of each target reservoir within a preset future time period; In response to the execution of the alternative strategy, use the cumulative silting benchmark amount, the regulating storage silting benchmark amount, the first cumulative silting amount matching the executed alternative strategy, and the first regulating storage silting amount matching the executed alternative strategy of each target reservoir within a preset future time period to determine the silting change amount and the regulating storage silting change amount of each target reservoir within a preset future time period.

7. The method according to claim 5, characterized in that The determining the target drainage order scheduling method in the preset drainage order scheduling method based on the cumulative silting amount and the regulating storage silting amount includes: Based on the cumulative silting amount and the regulating storage silting amount of each target reservoir matching each secondary scheduling strategy within the preset future time period, calculate the total cumulative silting amount and the total regulating storage silting amount of the target cascade reservoir system matching each secondary scheduling strategy within the preset future time period; In response to the deviation of the total cumulative silting amount matching each secondary scheduling strategy being less than a preset total silting amount deviation threshold, determine the smallest total regulating storage silting amount; Based on the secondary scheduling strategy corresponding to the smallest total regulating storage silting amount, determine the target drainage order scheduling method; wherein, the target drainage order scheduling method includes the first scheduling strategy executed sequentially and the secondary scheduling strategy corresponding to the smallest total regulating storage silting amount.

8. A device for determining a sediment regulation scheme of cascade reservoirs under water discharge conditions, characterized in that, The device includes: A data acquisition unit configured to: acquire the basic information and the measured information of each reservoir associated with the target cascade reservoir system; wherein, the target cascade reservoir system is a cascade reservoir system that needs to perform sediment regulation, and the target cascade reservoir system includes at least two target reservoirs cascaded along the associated water system; A silting amount calculation unit configured to: based on a preset drainage order scheduling method, the basic information and the measured information, use a preset reservoir sediment scouring and silting calculation model to predict the cumulative silting amount and the regulating storage silting amount of the target cascade reservoir system within a preset future time period; A comparison and selection unit configured to: based on the cumulative silting amount and the regulating storage silting amount, determine a target drainage order scheduling method in the preset drainage order scheduling method as the sediment regulation plan of the target cascade reservoir system.

9. An electronic device, the electronic device comprising: A processor; A memory for storing instructions executable by the processor; The processor is configured to read the executable instructions from the memory and execute the instructions to implement the method for determining a sediment regulation scheme for cascade reservoirs under the condition of water discharge according to any one of claims 1-7.

10. A computer-readable storage medium storing a computer program for executing the method for determining a sediment regulation scheme for cascade reservoirs under the condition of water discharge according to any one of claims 1-7.

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