11 results about "Virtual water" patented technology

The invention discloses a natural-artificial coupling virtual water network digital twinborn model construction method and system. The method comprises the following steps: acquiring historical monitoring data of a natural water network and an artificial water network; preprocessing the historical monitoring data to obtain a standardized data base plate; constructing a natural water network model and an artificial water network model based on the standardized data base plate of the natural water network; and based on the natural water network model and the artificial water network model, constructing a natural-artificial coupling virtual model through a graph theory algorithm. According to the method, effective integration of natural water network data and artificial water network data is realized, a comprehensive and accurate data basis is provided for subsequent model construction, the comprehensive cognition and analysis capability of the whole water network system is improved, the constructed model can realize comprehensive and accurate simulation of natural and artificial water network systems, and the construction efficiency is improved. Real-time interaction and sharing of water flow, water quality and other information between a natural water network and an artificial water network are achieved, and a powerful tool is provided for reasonable allocation and management of water resources.

The invention discloses a one-two-dimensional hydrodynamic coupling and solving method based on a virtual water volume storage unit. The method comprises the following steps: S1, accurately identifying a two-dimensional coupling interface by introducing a flow velocity gradient screening judgment method; s2, on the basis of determining a two-dimensional coupling interface, embedding the virtual water volume storage unit into the two-dimensional coupling interface, and constructing an initialization condition of the virtual water volume storage unit by using a CHM hydrological model; s3, calculating the water flow flux at a two-dimensional coupling interface by using an HLL solver; s4, updating the state of the virtual water volume storage unit by using a time integration method in combination with the water flow volume and the confluence item at the two-dimensional coupling interface; and S5, on the basis of a one-dimensional semi-implicit iteration method and a two-dimensional full implicit method, constructing a one-dimensional and two-dimensional hydrodynamic coupling hybrid solving strategy. The method has the advantages that high-precision coupling and efficient solution of the one-dimensional model and the two-dimensional model are achieved, and the accuracy and the calculation efficiency of hydrodynamic simulation of the complex river and lake system are improved.

The application discloses an agricultural water quality and water quantity dual risk and cascade transmission evaluation method, belongs to the technical field of water resource management, and aims at solving the problem that traditional methods only stay in water quantity depletion caused water resource pressure accounting and ignore the risk caused by substandard water quality; the application comprises the following steps: based on a farmland soil nitrogen budget and hydrodynamics coupling model, quantifying the pollution emission list of subdivided sources in the growth process of specific crops, simulating agricultural pollution dilution water consumption; using a crop water requirement model to calculate the irrigation water consumption of specific crops in the whole growth period; using a source and sink corrected physical flow trade model to analyze the virtual water transfer path hidden in each agricultural product trade link; integrating the production end and the consumption end results to realize high-precision grid agricultural water resource supply and demand imbalance risk evaluation and cascade effect analysis; and the cascade transmission effect of the application in evaluating the water resource risk provides strong support for reasonable allocation of agricultural water resources and improvement of nitrogen fertilizer utilization efficiency.

The invention relates to the technical field of water resource bearing monitoring, in particular to a water resource bearing condition evaluation method and system for a water resource overload area. The method comprises the following steps: collecting agricultural production water consumption, regional domestic water consumption, regional industrial water consumption, regional ecological water consumption, regional outlet virtual water quantity and regional inlet virtual water quantity of a water resource overload region; according to the agricultural production water consumption, the regional domestic water consumption, the regional industrial water consumption, the regional ecological water consumption, the regional outlet virtual water amount and the regional inlet virtual water amount, water footprint calculation is carried out to obtain a regional water footprint, water resource bearing level evaluation is carried out on the regional water footprint to obtain a water resource bearing level, and the water resource bearing level of the regional water footprint is calculated. And carrying out prediction analysis processing on the water resource bearing level to obtain a future water resource bearing level, judging whether the future water resource bearing level is a preset bearing level or not, if so, generating an early warning signal, and sending the early warning signal to a target terminal. Safety and stability of regional water resources are guaranteed.

The invention discloses an urban flood simulation method based on virtual pool network and SWMM coupling, and the method comprises the steps: taking each sub catchment region of a research region as an independent water storage unit, and constructing a corresponding virtual pool; adjacent pools are connected through triangular weirs to form a virtual pool network reflecting the evolution of surface accumulated water; for a sub catchment area containing an inspection well, bidirectional water exchange between a virtual pool and a pipe network is established by using a transverse weir, so that overflow of the pipe network can be supplemented to the earth surface, and accumulated water on the earth surface can also be discharged into the pipe network. The surface runoff firstly enters the corresponding virtual pools and then is exchanged between the virtual pools or between the virtual pools and the pipe network through the weir structure, so that the whole process simulation of rainfall runoff-surface ponding-pipe network drainage is realized. According to the method, the precision, the efficiency and the realizability are coordinated and unified, the bottleneck that high precision and high efficiency are difficult to consider in an existing urban flood simulation technology is broken through, and the method has remarkable engineering practical value and wide popularization prospects.

The application discloses to belong to the technical field of water resources management, and particularly relates to a water resources carrying capacity prediction method based on a water resources supply and demand prediction model, which comprises the following steps: collecting economic, water supply and hydro-meteorological data of a research area; constructing an input-output model, combining with structural decomposition analysis to identify virtual water core influencing factors; constructing a water resources supply and demand deep learning prediction model, inputting influencing factor data under different future scenarios, and outputting water resources supply and demand prediction values; using the supply and demand prediction values and future social and economic data to calculate water resources supply and demand indexes and concentrated carrying indexes, and integrating the two indexes into a water resources carrying capacity index through an entropy weight method. The application realizes accurate prediction of regional water resources supply and demand and dynamic quantification of water resources carrying capacity under multiple social economy-climate scenarios, can accurately identify core driving factors of water resources carrying capacity, and provides technical support for sustainable allocation of water resources in arid areas and coordinated development of social economy and ecological environment.

The invention discloses a ripple rendering method and device for a virtual water body, equipment and a storage medium, and the method comprises the steps: obtaining virtual collision information on a virtual water body model, and generating a height field which is used for representing simulation mechanical information of the virtual collision information acting on the virtual water body model; obtaining a horizontal plane velocity field of the virtual water body model, and processing the horizontal plane velocity field and the height field according to a preset shallow water equation to obtain a water surface fluctuation height of the virtual water body model; and generating a ripple animation of the virtual water body according to the water surface fluctuation heights of the virtual water body model under multiple frames. According to the method, the speed field and the height field of the horizontal plane are processed through the shallow water equation, and the influence of the water flow velocity on the water surface fluctuation effect can be additionally shown, so that the ripple animation which is richer and closer to the real effect is generated, and the visual experience of a user in a game is improved.

The invention discloses a grain virtual water flow evaluation method considering an irrigation yield increase effect. The method comprises the following steps: S1, acquiring per unit yield and crop production water footprint data of grain crops in a measurement and calculation area in irrigation cultivated land and rain-fed cultivated land in a measurement and calculation time period; s2, acquiring consumption data of various types of grains, and collecting grain yield data to calculate an inter-provincial grain trade network; s3, calculating the amount of water resources needing to be consumed when the grains participating in the trade produce in the output province and the input province respectively through a preset condition that no grain trade occurs; and S4, in combination with the grain trade circulation data and the grain production water footprint data, calculating inter-provincial grain virtual water flow momentum in the year and performing benefit evaluation. According to the method, a more rational grain virtual water flow evaluation method is realized, and reference can be provided for regional grain safety and water resource management.

The application discloses a rain flood resource water shortage-peak shaving double-target coordinated regulation method based on a distributed virtual reservoir, which comprises the following steps: constructing a virtual reservoir according to the administrative region division in a basin, wherein the reservoir capacity of the virtual reservoir is determined according to the area weight method based on the reservoir capacity in the basin; collecting monthly water demand data, rainfall data and natural runoff data in the basin, and determining the decision variable as the flow discharged under the regulation of the virtual reservoir; calculating the initial water quantity of the virtual reservoir, wherein the initial water quantity is determined based on the basin area, the initial precipitation and the natural runoff data, and the surface water coefficient in total water demand is calculated according to the water resources bulletin; constructing a multi-objective optimization model, solving the multi-objective optimization model by adopting an NSGA-II algorithm, generating a Pareto optimal solution set, and thus obtaining a monthly optimization regulation scheme of the virtual reservoir; and the application can be widely applied to rain flood resource optimization in the Zhuanlongwan basin and other arid and semi-arid regions.

The present invention discloses a one- and two-dimensional hydrodynamic coupling and solution method based on a virtual water storage unit, comprising: S1, accurately identifying the one- and two-dimensional coupling interface by introducing a judgment method for flow gradient screening; S2, embedding the virtual water storage unit into the one- and two-dimensional coupling interface based on the determination of the one- and two-dimensional coupling interface, and constructing the initialization conditions of the virtual water storage unit using the CHM hydrological model; S3, calculating the water flux at the one- and two-dimensional coupling interface using the HLL solver; S4, combining the water flux and the source-sink term at the one- and two-dimensional coupling interface to update the state of the virtual water storage unit using the time integration method; S5, constructing a hybrid solution strategy for one- and two-dimensional hydrodynamic coupling based on a one-dimensional semi-implicit iterative method and a two-dimensional fully implicit method. The advantages are: achieving high-precision coupling and efficient solution of one- and two-dimensional models, and improving the accuracy and computational efficiency of hydrodynamic simulation of complex river and lake systems.

The invention discloses a rainfall flood resource water shortage-peak clipping double-target cooperative regulation and control method based on a distributed virtual reservoir, and the method comprises the following steps: constructing a virtual reservoir according to the division of an administrative region in a drainage basin, and calculating and determining the storage capacity of the virtual reservoir based on the storage capacity of the reservoir in the drainage basin according to an area weight method; collecting monthly water demand data, rainfall data and natural runoff data in the drainage basin, and determining a decision variable as a virtual reservoir to regulate and control the discharged flow; the initial water quantity of the virtual reservoir is calculated, the initial water quantity is determined based on the drainage basin area, the initial precipitation quantity and the natural runoff data, and the surface water accounting for the total water use and demand coefficient is calculated according to the water resource announcement; constructing a multi-objective optimization model, solving the multi-objective optimization model by adopting an NSGA-II algorithm, and generating a Pareto optimal solution set, so as to obtain a monthly optimization regulation and control scheme of the virtual reservoir; the method can be widely applied to rainfall flood resource optimization in the Gangwan river basin and other arid and semi-arid areas.