Method for simulating regional water flow movement based on coupling of soil unsaturated water and groundwater

Abstract

The invention provides a method for simulating regional water flow movement based on coupling of soil unsaturated water and groundwater, comprising the following steps of for each finite element nodeP in the research area, adopting the following methods to obtain a grid corresponding to each finite element node P in space; calculating the rainfall infiltration of node P of finite element method;establishing a one-dimensional soil unsaturated flow simulation model; calculating the influence area AP of finite element node P; establishing a three-dimensional groundwater flow model to simulate the groundwater flow. The advantages are that (1) the spatial correlation between the remote sensing raster data and the finite element nodes is realized, which ensures the accuracy of the subsequent groundwater flow simulation by the finite element method; (2) the one-dimensional soil unsaturated flow simulation model and the three-dimensional groundwater flow model are coupled to ensure the simulation accuracy of groundwater flow.

Description

Technical field [0001] The invention belongs to the technical field of regional water flow motion simulation, and specifically relates to a regional water flow motion simulation method based on the coupling of soil unsaturated water and groundwater. Background technique [0002] Surface hydrological processes such as rainfall, evaporation, soil infiltration, and groundwater flow movement are an organic whole that interacts and is internally linked under certain topographic, geological and climatic conditions. Therefore, in the numerical simulation of groundwater flow movement, it is necessary to use surface hydrological data as input drive to ensure the accuracy of groundwater flow movement numerical simulation. [0003] However, in the process of implementing the present invention, the inventor found that the prior art has at least the following problems: [0004] Since surface hydrological data is mainly obtained through satellite remote sensing, and satellite remote sensing data ...

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Problems solved by technology

[0004] Since surface hydrological data are mainly obtained through satellite remote sensing, and satellite remote sensing data are stored in the form of grids, for the groundwater model based on the finite element method, when it performs numerical simulation of groundwater flow movement, the satellite remote sensing data in grid form The data cannot be directly input into the groundwater model, which hinders the numerical simulation of groundwater flow movement

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