River restoration method, system, equipment and medium

Abstract

The invention relates to the technical field of environmental protection, and discloses a river restoration method, system, device and medium, the method comprises the following steps: respectively inputting simulated water flows with different water flow characteristics into a river model of a target river to make the river model generate dynamic changes, the water flow characteristics comprise at least one of the water flow size and the water flow duration, the dynamic change of the river model is used for representing river change characteristics, matched with the water flow characteristics, of the target river; based on the dynamic change of the river model, determining target water flow characteristics meeting a river restoration target; and under the condition that the current water flow characteristics of the target river are different from the target water flow characteristics, supplementing water flow to the target river or leading water flow out of the target river according to the target water flow characteristics so as to repair the target river through the action of the water flow meeting the target water flow characteristics. River restoration can be carried out according to the natural law of river formation, and the restoration effect is good.

Description

Technical Field

[0001] The present disclosure relates to the field of environmental protection technology, and in particular to a river restoration method, system, equipment and medium. Background Art

[0002] Rivers are important carriers of energy and material flows in natural ecosystems, and are corridors for the reproduction and survival of animals and plants. At present, due to the destruction of human activities, many rivers have suffered from siltation, dry-up, and water quality deterioration, which has greatly affected the production, life and ecological water use of local residents, and the ecological foundation of regional development has been shaken. Therefore, it is necessary to repair these rivers.

[0003] At present, many river restoration methods are based on artificial excavation and other methods. This restoration method does not follow the natural laws of river formation and the restoration effect needs to be improved. Summary of the invention

[0004] In view of this, the embodiments of the present disclosure provide a river restoration method, a river restoration system, an electronic device and a computer-readable storage medium, which can perform river restoration according to the natural laws of river formation and have a good restoration effect.

[0005] In one aspect, the present disclosure provides a river restoration method, the method comprising:

[0006] Inputting simulated water flows with different water flow characteristics into a river model of a target river respectively, so that the river model undergoes dynamic changes, wherein the water flow characteristics include at least one of water flow size and water flow duration, and the dynamic changes of the river model are used to characterize river change characteristics of the target river that match the water flow characteristics;

[0007] Determining target water flow characteristics that meet river restoration goals based on dynamic changes in the river model;

[0008] When there is a difference between the current water flow characteristics of the target river and the target water flow characteristics, water is supplemented to the target river or water is drawn from the target river according to the target water flow characteristics, so as to repair the target river through the action of the water flow that meets the target water flow characteristics.

[0009] Another aspect of the present disclosure provides a river restoration system, the system comprising:

[0010] A water flow input module, used to input simulated water flows with different water flow characteristics into a river model of a target river, respectively, so that the river model undergoes dynamic changes, wherein the water flow characteristics include at least one of a water flow size and a water flow duration, and the dynamic changes of the river model are used to characterize river change characteristics of the target river that match the water flow characteristics;

[0011] A water flow characteristic determination module, used to determine target water flow characteristics that meet the river restoration objectives based on the dynamic changes of the river model;

[0012] A repair module is used to supplement water to the target river or draw water from the target river according to the target water flow characteristics when there is a difference between the current water flow characteristics of the target river and the target water flow characteristics, so as to repair the target river through the action of the water flow that meets the target water flow characteristics.

[0013] Another aspect of the present disclosure further provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, and when the computer program is executed by a processor, the method described above is implemented.

[0014] Another aspect of the present disclosure provides an electronic device, which includes a processor and a memory, wherein the memory is used to store a computer program, and when the computer program is executed by the processor, the method described above is implemented.

[0015] In the technical solutions of some embodiments of the present application, simulated water flows with different water flow characteristics are respectively input into the river model of the target river, and the target water flow characteristics that meet the river restoration goal are determined according to the dynamic changes generated by the river model. In addition, when there is a difference between the current water flow characteristics of the target river and the target water flow characteristics, the water flow characteristics in the target river are made the same as the target water flow characteristics by supplementing or diverting water flow, so as to achieve the restoration of the target river. Since the target river is repaired based on the power of the water flow, the restoration of the target river can be in accordance with the natural laws of water flow movement, avoiding the problem that the repaired river does not comply with the natural laws caused by repair methods such as artificial excavation. Therefore, the method of the present application can greatly improve the river restoration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features and advantages of the present disclosure will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present disclosure in any way. In the accompanying drawings:

[0017] Figure 1 A schematic diagram of a process of a river restoration method provided by an embodiment of the present application is shown;

[0018] Figure 2 A schematic diagram showing a monthly runoff variation process line under different guarantee rate conditions provided by an embodiment of the present application;

[0019] Figure 3 A schematic diagram of a module of a river restoration system provided by an embodiment of the present application is shown;

[0020] Figure 4 A module schematic diagram of an electronic device provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0022] At present, when repairing rivers through artificial excavation and other methods, on the one hand, it takes a lot of manpower and material resources, and on the other hand, the repaired rivers may not follow the laws of nature, and the repair effect needs to be improved. For example, when artificially excavating and dredging the silted river channel, the river channel is excavated to the west, but in the actual flow of water, the water tends to flow to the east, which causes the direction of the repaired river to not meet the laws of nature, and the repair effect is poor.

[0023] To solve the above problems, the present application provides a river restoration method that can solve the above problems. The river restoration method can be applied to electronic devices. Electronic devices include but are not limited to tablet computers, laptop computers, desktop computers, etc. Figure 1 , which is a flow chart of a river restoration method provided in one embodiment of the present application. Figure 1 In the present invention, the river restoration method includes the following steps:

[0024] Step S11, respectively inputting simulated water flows with different water flow characteristics into the river model of the target river to make the river model change dynamically, the water flow characteristics include at least one of the water flow size and the water flow duration, and the dynamic change of the river model is used to characterize the river change characteristics of the target river that match the water flow characteristics.

[0025] Specifically, the target river can be a river to be repaired. The river model can include but is not limited to a two-dimensional hydrodynamic model, a two-dimensional water-sand model, an ecological model, etc. of the target river. By inputting simulated water flows with different water flow characteristics into the river model, the changes that will occur in the target river under the impact of water flows with different water flow characteristics (i.e., river change characteristics) can be simulated. For example, after a few weeks of using a 100 cubic meter / second water flow to impact the target river, due to the relatively large impact force generated by the water flow, some siltation on both sides of the target river will be dispersed, resulting in the widening of the river channel of the target river. This is the river change characteristic of the target river that matches the water flow characteristics. For another example, after a month of using a 150 cubic meter / second water flow to impact the target river, due to the relatively large water flow, flooding will occur on both sides of the target river, and the organisms in the target river will migrate to the places on both sides of the target river that were originally land. This is also the river change characteristic of the target river that matches the water flow characteristics.

[0026] In this embodiment, the simulated water flow with different water flow characteristics can be determined by the river restoration personnel based on the river restoration goal and according to artificial experience. For example, in order to achieve the river restoration goal of dredging the blocked part of the target river, a water flow with relatively large impact force (i.e., a water flow with relatively large water flow) can be used to impact the target river for a period of time. Based on this, the river restoration personnel can pre-set simulated water flow A, simulated water flow B and simulated water flow C according to artificial experience. Among them, the water flow size of simulated water flow A can be 150 cubic meters / second, and the water flow duration can be 1 week; the water flow size of simulated water flow B can be 160 cubic meters / second, and the water flow duration can be 1 month; the water flow size of simulated water flow C can be 170 cubic meters / second, and the water flow duration can be 2 months.

[0027] It is understandable that the dynamic changes of the river model may be different for simulated water flows with different water flow characteristics. For example, after the simulated water flow C is input into the river model, the siltation in the river model may be dispersed in the second week, but after the simulated water flow C is input into the river model and reaches the water flow time, the siltation in the river model may not be completely dispersed. Therefore, in step S11, the dynamic changes of the river model corresponding to each simulated water flow can be determined respectively.

[0028] In simple terms, in step S11, simulated water flows with different water flow characteristics are input into the river model, and then based on the dynamic changes of the river model, the changes that the water flows with different water flow characteristics can bring to the target river (i.e., river change characteristics) are observed.

[0029] Step S12, based on the dynamic changes of the river model, determine the target water flow characteristics that meet the river restoration goals.

[0030] Specifically, based on the simulation results of step S11, if the river change characteristics corresponding to the water flow of a water flow characteristic are the river change characteristics required to achieve the river restoration goal, then the water flow of this water flow characteristic can be used to repair the target river; if the river change characteristics corresponding to the water flow of a water flow characteristic are not the river change characteristics required to achieve the river restoration goal, then the water flow of this water flow characteristic may not be used to repair the target river.

[0031] For example, suppose the goal of river restoration is to clear the siltation in the target river. After the simulated water flow A with water flow characteristic A is input into the river model, if it is determined that the siltation in the target river is dispersed according to the dynamic changes of the river model, then the water flow with water flow characteristic A can be used to repair the target river, that is, the water flow characteristic A can be used as the target water flow characteristic that meets the goal of river restoration. Conversely, after the simulated water flow B with water flow characteristic B is input into the river model, if it is determined that the siltation in the target river cannot be dispersed according to the dynamic changes of the river model, then the water flow with water flow characteristic B cannot be used to repair the target river, that is, the water flow characteristic B cannot be used as the target water flow characteristic that meets the goal of river restoration.

[0032] Step S13, when there is a difference between the current water flow characteristics of the target river and the target water flow characteristics, water is supplemented to the target river or water is drawn from the target river according to the target water flow characteristics, so as to repair the target river through the action of water meeting the target water flow characteristics.

[0033] Specifically, when the water flow in the target river is insufficient, water can be supplemented to the target river through water conservancy facilities such as reservoirs and dams; when the water flow in the target river is excessive, water can be diverted from the target river through flood discharge and other methods. By supplementing or diverting water flow, the water flow characteristics in the target river can be made the same as the target water flow characteristics, and then the target river can be repaired through the effect of water flow that meets the target water flow characteristics.

[0034] In summary, in the technical solutions of some embodiments of the present application, simulated water flows with different water flow characteristics are respectively input into the river model of the target river, and the target water flow characteristics that meet the river restoration goal are determined according to the dynamic changes generated by the river model. In addition, when there is a difference between the current water flow characteristics of the target river and the target water flow characteristics, the water flow characteristics in the target river are made the same as the target water flow characteristics by supplementing or diverting water flow, so as to achieve the restoration of the target river. Since the target river is repaired based on the power of the water flow, the restoration of the target river can be in accordance with the natural laws of water flow movement, avoiding the problem that the repaired river does not comply with the natural laws caused by repair methods such as artificial excavation. Therefore, the method of the present application can greatly improve the river restoration effect.

[0035] The solution of the present application is further described below in conjunction with some other embodiments.

[0036] In some embodiments, the river model may include a two-dimensional hydrodynamic model of the target river, and the river restoration target may include a first restoration target of making the water flow in the target river in a continuous flow state. Specifically, the first restoration target is for the target river to be cut off. Through river restoration, the target river is kept in a continuous flow state (i.e., the water flow is in a continuous flow state), so as to restore the spatiotemporal variability of the hydrological situation of the target river. The first restoration target can also be called a "wet river bottom".

[0037] Specifically, natural hydrological conditions are the basis for maintaining biodiversity and ecosystem integrity. The spatiotemporal variability of hydrological conditions is a basic element of freshwater biodiversity. On a temporal scale, affected by atmospheric circulation and monsoons, the hydrological cycle has obvious annual changes, forming an orderly rotation between flood and dry seasons, creating regularly changing runoff conditions, and forming dynamic habitat diversity conditions that change over time. The hydrological conditions change over time, causing a series of hydrological and hydrodynamic conditions such as flow changes, water level fluctuations, confluence or top support between main and tributary rivers, main channel flood discharge and flood overflow, etc., which meet the needs of a large number of aquatic species at different stages of their life cycle and become the basis of biodiversity. On a spatial scale, due to the obvious differences in rainfall and topography in the basin, obvious differences in hydrological conditions are formed in different areas of the upper, middle and lower reaches of the basin, creating habitat differences within the basin and forming different biological zones within the basin. It can be seen that the spatiotemporal variability of the hydrological conditions leads to the diversity of community composition, structure, function and ecological processes in the basin.

[0038] At the same time, the spatiotemporal variability of hydrological conditions is also the driving force of river material flow, energy flow, information flow and species flow. As a flowing medium and carrier, water flow continuously transports nutrients such as sediment and inorganic salts to the downstream, promoting photosynthesis, material circulation and energy conversion of the ecosystem. The changes in river abundance and drought and flood pulses transmit various life signals to organisms, and fish and other organisms spawn, forage, take refuge, and hibernate accordingly, completing various stages of their life history; at the same time, the hydrological process of the river provides the necessary conditions for the drifting of fish eggs and tree species and the migration of migratory fish.

[0039] Based on the above description, it is known that it is very necessary to repair the target river that has been cut off. Determining the target water flow characteristics that meet the river restoration target in step S12 may include:

[0040] Acquire historical water flow data of the target river, and determine at least one first initial water flow feature based on historical water flow features extracted from the historical water flow data;

[0041] The simulated water flow with the first initial water flow characteristic is respectively input into the two-dimensional hydrodynamic model, and the first target water flow characteristic satisfying the first restoration target is determined according to the dynamic change of the water flow in the two-dimensional hydrodynamic model.

[0042] Specifically, historical water flow data of the target river for one or more years when there is no dry-up can be obtained. For example, the average flow rate and peak runoff value of the target river in different hydrological years from 1956 to 2016 are obtained as historical water flow data, and then the historical water flow data are analyzed to extract the historical water flow characteristics of the target river. Since the historical water flow characteristics extracted here can be the water flow characteristics of the target river when there is no dry-up in history, the historical water flow characteristics can be used as a reference to determine at least one first initial water flow characteristic. For example, after adding or subtracting some water flow on the basis of the historical water flow size, the new water flow size is used as the first initial water flow characteristic.

[0043] After the simulated water flows with the first initial water flow characteristics are input into the two-dimensional hydrodynamic model respectively, it can be determined whether each first initial water flow characteristic can meet the first restoration target according to the dynamic changes of the water flow in the two-dimensional hydrodynamic model. If so, the first initial water flow characteristic can be used as the first target water flow characteristic. After the target river is restored using the water flow with the first target water flow characteristic, the target river that is cut off can be restored.

[0044] In some embodiments, when the target river is repaired using a water flow having the first target water flow characteristic, the monthly runoff change process line of the target river under different guarantee rate conditions of 5%-95% can be analyzed based on the flow duration curve method to determine the water flow that needs to be dispatched to the target river. Specifically, the guarantee rate refers to the probability of the monthly runoff change process line appearing in the target river. For example, in combination with reference to Figure 2 , which is a schematic diagram of the monthly runoff variation process line under different guarantee rate conditions provided by an embodiment of the present application. Figure 2 In the figure, the probability of the monthly runoff variation process line A is 10%, the probability of the monthly runoff variation process line B is 30%, and so on. By analyzing the monthly runoff variation process lines under different guarantee rate conditions, it is possible to determine the amount of water flow that needs to be dispatched to the target river when the water flow characteristics in the target river meet the first target water flow characteristics.

[0045] In some embodiments, considering that the water flow in the target river also needs to be used by organisms in the watershed, the above-mentioned determination of at least one first initial water flow feature based on the historical water flow features extracted from the historical water flow data may include:

[0046] Obtain the historical biorhythm characteristics within the watershed of the target river;

[0047] The historical water flow characteristics and the historical biorhythm characteristics are fused to determine at least one first initial water flow characteristic.

[0048] In this way, when the target river is restored according to the first restoration goal, the biorhythm characteristics are taken into consideration, and the first initial water flow characteristics obtained are more accurate.

[0049] In some embodiments, the target river is repaired according to the first repair goal, and the groundwater of the target river can also be repaired at the same time to increase the groundwater reserves of the target river.

[0050] In some embodiments, the river model includes a two-dimensional water and sediment model of the target river, and the river restoration target includes a second restoration target of restoring the river channel shape of the target river to the initial target shape. Specifically, the second restoration target refers to reducing human damage (such as the impact of man-made golf courses on the river channel) and restoring the natural river geomorphology and river geomorphic process of the target river. The second restoration target can also be called "pulling the river channel".

[0051] Specifically, the river geomorphic process is the process in which sediment is eroded, transported and deposited under the action of river dynamics, and the river channel and floodplain are shaped. It is a dynamic and continuous process. The scouring of the riverbed by water flow and the transport and deposition of sediment are the main reasons for the evolution of river geomorphology and the main driving force for sediment movement and river channel evolution. The diverse river geomorphic processes have created the spatial heterogeneity of river morphology and determined the diversity and effectiveness of biological habitats. The spatial heterogeneity of river morphology is manifested in the diversity of river morphology and the diversity of geomorphic units in cross sections. Water flow is the driving force of river channel evolution. The water flow structure of the river channel has diverse characteristics. In addition to the mainstream in the direction of the river, there are also secondary flows perpendicular to the mainstream flow direction, which have an important impact on the velocity field pattern, sediment deposition, and especially the evolution of the riverbed. It is the main factor in the evolution of the riverbed, the formation and change of river geomorphic characteristics.

[0052] The river sediment transport is very important for the riverbed dynamics. The dynamic balance of river water and sediment transport determines the scouring and siltation of the river channel. The natural water and sediment process shapes the longitudinal and transverse cross-sections of the river channel with different shapes. The bed-forming flow directly links the water and sediment process with the river channel cross-section, which plays an important role in shaping the river morphology.

[0053] Based on the above description, determining the target water flow characteristics that meet the river restoration target in step S12 may include:

[0054] Determining at least one second initial water flow characteristic based on a water flow characteristic of a first flood flowing through the target river and occurring once every first preset year;

[0055] The simulated water flow with the second initial water flow characteristics is respectively input into the two-dimensional water-sand model, and the second target water flow characteristics that meet the second restoration goal are determined according to the dynamic changes of the water flow and sediment in the two-dimensional water-sand model.

[0056] Specifically, the first preset year can be 1 year, 2 years, 3 years and 5 years. That is, based on the water flow characteristics of the first flood that occurs once a year, a second initial water flow characteristic can be determined; based on the water flow characteristics of the first flood that occurs once every 2 years, a second initial water flow characteristic can be determined; and so on. By inputting the simulated water flow with the second initial water flow characteristic into the two-dimensional water-sand model respectively, the second target water flow characteristic that meets the second restoration goal can be screened out according to the dynamic changes of the water flow and sediment in the two-dimensional water-sand model. In this way, based on the effect of the water flow with the second target water flow characteristic, the target river can be repaired and the second restoration goal can be achieved.

[0057] In this embodiment, when the current water flow characteristics of the target river differ from the second target water flow characteristics, water flow can be supplemented to the target river according to the second target water flow characteristics. This method of supplementing water flow can also be called pulse water replenishment. Pulse water replenishment is used to restore diverse natural habitats through natural scouring and silting, which promotes the natural restoration of river landforms and ecological environment. By utilizing the natural water flow bed-building capacity of ecological water replenishment, a "three-level river channel" complex natural cross-section of "small water base flow river channel, flat beach flow river channel, and floodplain flow river channel" can be formed.

[0058] In some embodiments, the river model includes a two-dimensional hydrodynamic model of the target river, and the river restoration target includes a third restoration target of restoring the channel shape of the target river from an initial target shape to a final target shape. Specifically, the third restoration target is a further optimization restoration of the channel shape after the second restoration target is achieved. The third restoration target can also be called "fixing the river shape".

[0059] Specifically, determining the target water flow characteristics that meet the river restoration target in step S12 may include:

[0060] Determining at least one third initial water flow characteristic based on the water flow characteristic of a second flood flowing through the target river and occurring once every second preset year;

[0061] The simulated water flow with the third initial water flow characteristic is respectively input into the two-dimensional hydrodynamic model, and the third target water flow characteristic that meets the third restoration goal is determined according to the dynamic change of the river channel in the two-dimensional hydrodynamic model.

[0062] Specifically, the second preset year may be 10 years, 9 years, etc. For example, according to the water flow characteristics of the second flood that occurs once every 10 years, a third initial water flow characteristic may be determined.

[0063] The restoration process of the third restoration target is similar to that of the second restoration target, so I will not repeat it here. By implementing multiple large flows suitable for the riverbed and slope of the target river to flush the "river type", the natural restoration of the river landform can be further promoted.

[0064] Furthermore, based on the correlation between riverbed evolution, river morphology changes and hydrological conditions, as well as the stability and evolution characteristics of the natural river morphology recreated under the dual effects of artificial induction and pseudo-natural pulse water replenishment under 10-year flood conditions, artificial dredging and guidance can be used to accelerate the formation of water replenishment channels and stabilize the mainstream morphology.

[0065] In some embodiments, the initial target shape and the final target shape are obtained based on the river channel shape of the target river in a specified historical period. Specifically, the specified historical period may be a period when the target river has not been destroyed. In this way, the initial target shape and the final target shape of the target river are in accordance with natural laws and are relatively accurate.

[0066] In some embodiments, after achieving the first, second and third restoration goals, the ecology of the target river can also be restored, i.e., "ecological restoration". In theory, "ecological restoration" can include the following two aspects:

[0067] 1) Water quality physicochemical process

[0068] Specifically, the physical and chemical properties of river water need to be maintained within the normal range to meet the needs of aquatic organisms for growth and reproduction. The physical and chemical properties of water are also key factors in determining the composition of freshwater biological communities. The flow of water, sediment movement and water temperature in rivers provide important habitat conditions for aquatic organisms. Dissolved oxygen in river water is a necessary condition for biological respiration. Generally speaking, when the dissolved oxygen in water is lower than 1 mg / L, most fish in the water will be affected. The turbidity of water directly affects the photosynthesis and respiration of aquatic plants and algae in the water. Aquatic plants and algae are primary producers and require suitable nutrients, water temperature and sunlight. When sunlight shines on the lake, the important factor that determines its effect is the clarity of the water. The higher the clarity, the deeper the depth of sunlight, and the more photosynthesis can be maintained at the maximum depth. The opposite of clarity is turbidity. The higher the turbidity of lake water, the weaker the penetration of sunlight. The dissolved oxygen and nutrients in river water are used or absorbed by aquatic organisms, undergoing complex migration and transformation to complete the whole process of material circulation. In addition to the chemical processes of the river water itself, the water quality changes due to the discharge of various pollutants and organic chemicals into the water by humans.

[0069] By implementing ecological dispatching of upstream reservoirs, a set of pulsed water flow sequences are formed, and pulsed water replenishment is used to naturally scour and build beds to restore the river corridor ecosystem of "streams, rivers, lakes (pits)", and by constructing diverse habitats such as deep pools, shallows, and river islands, the water quality of upstream water is effectively maintained. At the same time, in view of the relatively uniform particle size and lack of heterogeneity of the current riverbed matrix of the target river, the high permeability of the riverbed, the water quality risks of multiple water sources such as recycled water, and the single biological habitat, ecological matrix improvement materials optimized and synthesized by active components such as sulfur-iron biopromoters, phosphorus lockers, and natural minerals can be used. During use, they are compounded with the current riverbed quality to improve the riverbed matrix, purify water quality, promote biological growth, and improve the stability of the river ecosystem.

[0070] 2) Bioecological Processes

[0071] The above-mentioned ecological factors such as hydrological conditions, river and lake geomorphology, and physical and chemical characteristics of water bodies are all non-living parts or life-supporting parts of aquatic ecosystems. The core of aquatic ecosystems is the life system. The ecological factors of the non-living part directly or indirectly affect the life system, especially the food web and biodiversity of rivers.

[0072] The dynamic hydrological regime of river runoff is the driving force of river ecosystems. The spatial heterogeneity of river landforms provides conditions for habitat diversity and creates a habitat space consisting of river channels, riverside zones and floodplains. The complexity of river landforms is the basis of biodiversity.

[0073] Based on the above description, the river model may include a two-dimensional hydrodynamic model of the target river and an ecological model of the target river, and the river restoration target package may include a fourth restoration target of a designated habitat ratio within the watershed of the target river. After achieving the above first, second and third restoration targets, determining the target water flow characteristics that meet the river restoration target in step S12 may include:

[0074] The two-dimensional hydrodynamic model and the ecological model are coupled to obtain a coupled model;

[0075] determining at least one fourth initial water flow characteristic based on water flow characteristics of seasonal floods flowing in the target river;

[0076] The simulated water flows with the fourth initial water flow characteristics are respectively input into the coupling model, and the fourth target water flow characteristics that meet the fourth restoration goal are determined based on the changes in the habitat proportions of organisms in the coupling model under different water flow characteristics.

[0077] In this embodiment, based on the coupling model, the effective habitat proportion and the optimal habitat proportion of fish under different hydrological rhythm conditions can be simulated, and the stream-lake ecological connectivity design and habitat space creation can be carried out in combination with the fish's demand for physical habitats. Specifically, with the goal of restoring the main species of fish, carbon and nitrogen isotope detection of sediments, water bodies, plankton, benthic, and fish in typical aquatic ecosystems can be carried out, and the fish food source and trophic level characteristics can be analyzed. In combination with the results of the water food source and trophic level analysis, the water food web structure can be improved to increase biodiversity through measures such as replanting aquatic plants and releasing aquatic animals.

[0078] Furthermore, the floodplain is the area covered by water when the flood flow passes through the floodplain. Seasonal floods are the main driving force of the floodplain ecosystem. The primary producers of the floodplain are mainly algae and vascular plants. Taking into account the plant diversity and structural stability of the riparian zone, a test method for hydraulic parameters such as drag force and Manning coefficient under different vegetation configuration modes can be established to obtain the optimal vegetation configuration mode, configuration direction and configuration density, forming a sandy riverbank vegetation configuration and slope protection construction technology, and achieving the ecological restoration goal of "natural, ecological, and low disturbance".

[0079] Furthermore, through indoor water tank simulation experiments and field investigation tests, equation fitting and data analysis can be carried out to determine the optimal low-resistance flow configuration, the best plant species and the form of ecological bank protection, and then obtain the technical component units for the construction of green ecological corridor ecological riverbanks, as well as clarify the horizontal and vertical spatial layout ideas for the construction of ecological riverbanks, and improve riverbank ecological restoration.

[0080] This completes the description of the method of this application.

[0081] Combined with reference Figure 3 , which is a module schematic diagram of a river restoration system provided in one embodiment of the present application. Figure 3 In the case of the river restoration system, the following are included:

[0082] A water flow input module, used to input simulated water flows with different water flow characteristics into the river model of the target river respectively, so that the river model produces dynamic changes, the water flow characteristics include at least one of the water flow size and the water flow duration, and the dynamic changes of the river model are used to characterize the river change characteristics of the target river that match the water flow characteristics;

[0083] A water flow characteristic determination module is used to determine the target water flow characteristics that meet the river restoration goals based on the dynamic changes of the river model;

[0084] The repair module is used to supplement water to the target river or draw water from the target river according to the target water flow characteristics when the current water flow characteristics of the target river are different from the target water flow characteristics, so as to repair the target river through the action of the water flow that meets the target water flow characteristics.

[0085] Combined with reference Figure 4 , is a schematic diagram of an electronic device provided by an embodiment of the present disclosure. The electronic device includes a processor and a memory, the memory is used to store a computer program, and when the computer program is executed by the processor, the above method is implemented.

[0086] The processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0087] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs, non-transitory computer executable programs and modules, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions and modules stored in the memory, that is, implementing the method in the above method embodiment.

[0088] The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created by the processor, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0089] An embodiment of the present disclosure further provides a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program. When the computer program is executed by a processor, the above method is implemented.

[0090] Although the embodiments of the present disclosure have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present disclosure, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A river restoration method, characterized in that: The method comprises: Inputting simulated water flows with different water flow characteristics into a river model of a target river respectively, so that the river model undergoes dynamic changes, wherein the water flow characteristics include at least one of water flow size and water flow duration, and the dynamic changes of the river model are used to characterize river change characteristics of the target river that match the water flow characteristics; Determining target water flow characteristics that meet river restoration goals based on dynamic changes in the river model; When there is a difference between the current water flow characteristics of the target river and the target water flow characteristics, water is supplemented to the target river or water is drawn from the target river according to the target water flow characteristics, so as to repair the target river through the action of the water flow that meets the target water flow characteristics.

2. The method according to claim 1, characterized in that The river model includes a two-dimensional hydrodynamic model of the target river, and the river restoration target includes a first restoration target of making the water flow in the target river in a continuous flow state; Determining target flow characteristics that meet river restoration goals includes: Acquire historical water flow data of the target river, and determine at least one first initial water flow feature according to historical water flow features extracted from the historical water flow data; The simulated water flow having the first initial water flow characteristic is respectively input into the two-dimensional hydrodynamic model, and the first target water flow characteristic satisfying the first restoration target is determined according to the dynamic change of the water flow in the two-dimensional hydrodynamic model.

3. The method according to claim 2, characterized in that The step of determining at least one first initial water flow feature according to the historical water flow features extracted from the historical water flow data comprises: Acquiring historical biorhythm characteristics within the watershed of the target river; The historical water flow characteristics and the historical biorhythm characteristics are fused to determine the at least one first initial water flow characteristic.

4. The method according to claim 1, characterized in that The river model includes a two-dimensional water-sediment model of the target river, and the river restoration target includes a second restoration target of restoring the river channel shape of the target river to an initial target shape; Determining target flow characteristics that meet river restoration goals includes: Determining at least one second initial water flow characteristic according to a water flow characteristic of a first flood flowing through the target river and occurring once every first preset year; The simulated water flow with the second initial water flow characteristics is respectively input into the two-dimensional water-sand model, and the second target water flow characteristics that meet the second restoration goal are determined according to the dynamic changes of water flow and sediment in the two-dimensional water-sand model.

5. The method according to claim 4, characterized in that The river model includes a two-dimensional hydrodynamic model of the target river, and the river restoration target includes a third restoration target of restoring the river channel shape of the target river from the initial target shape to a final target shape; Determining target flow characteristics that meet river restoration goals includes: Determining at least one third initial water flow characteristic according to the water flow characteristic of a second flood flowing through the target river and occurring once every second preset year; The simulated water flow with the third initial water flow characteristics is respectively input into the two-dimensional hydrodynamic model, and the third target water flow characteristics that meet the third restoration goal are determined according to the dynamic changes of the river channel in the two-dimensional hydrodynamic model.

6. The method according to claim 5, characterized in that The initial target shape and the final target shape are obtained based on the river channel shape of the target river in a specified historical period.

7. The method according to claim 1, characterized in that The river model includes a two-dimensional hydrodynamic model of the target river and an ecological model of the target river, and the river restoration target includes a fourth restoration target of making the habitat proportion of organisms reach a designated habitat proportion within the watershed of the target river; Determining target flow characteristics that meet river restoration goals includes: coupling the two-dimensional hydrodynamic model and the ecological model to obtain a coupled model; determining at least one fourth initial water flow characteristic according to the water flow characteristics of the seasonal flood flowing in the target river; The simulated water flow with the fourth initial water flow characteristic is respectively input into the coupling model, and the fourth target water flow characteristic that meets the fourth restoration goal is determined according to the changes in the habitat proportion of the organisms in the coupling model under different water flow characteristics.

8. A river restoration system, characterized in that: The system comprises: A water flow input module, used to input simulated water flows with different water flow characteristics into a river model of a target river, respectively, so that the river model undergoes dynamic changes, wherein the water flow characteristics include at least one of a water flow size and a water flow duration, and the dynamic changes of the river model are used to characterize river change characteristics of the target river that match the water flow characteristics; A water flow characteristic determination module, used to determine target water flow characteristics that meet the river restoration objectives based on the dynamic changes of the river model; A repair module is used to supplement water to the target river or draw water from the target river according to the target water flow characteristics when there is a difference between the current water flow characteristics of the target river and the target water flow characteristics, so as to repair the target river through the action of the water flow that meets the target water flow characteristics.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: The electronic device comprises a processor and a memory, wherein the memory is used to store a computer program, and when the computer program is executed by the processor, the method according to any one of claims 1 to 7 is implemented.

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