Saturated-unsaturated moisture and solute transport dual iterative coupling method and device

Abstract

The invention provides a saturated-unsaturated moisture and solute transport dual iterative coupling method and device. The method comprises the following steps: step 1, collecting hydrogeological meteorological data information of a research area; dispersing an unsaturated zone and a saturated zone in the research area; calculating to obtain moisture and solute transport conditions under each stress period and each time step; 2, setting the thickness of an unsaturated zone; 3, operating the unsaturated zone moisture transport module; 4, judging whether the calculation result of the unsaturated zone moisture movement module meets the requirement of solute transport calculation or not; 5, calculating the average groundwater supply rate R in the delta T time period; 6, running a saturated zone underground water motion module; 7, judging the convergence of the moisture motion module; step 8, setting a lower boundary condition of an unsaturated zone solute; 9, operating the unsaturated zone solute transport module; step 10, operating a saturated zone solute transport module; and step 11, judging the convergence of the solute transport module.

Description

technical field [0001] The invention belongs to the field of calculation of underground water and solute, and in particular relates to a double iterative coupling method and device for regional saturated-unsaturated water and solute migration models. [0002] technical background [0003] Regional-scale saturated-unsaturated water and solute migration laws have always been the focus of research on groundwater resources and the environment. It is related to issues such as groundwater pollution, soil salinization, groundwater exploitation, and irrigation and drainage of agricultural irrigation areas. And the solute transport model is an effective research method. Soil moisture in the unsaturated zone is an important source of recharge for the groundwater system and the main consumption path of groundwater in the subsurface layer. It is also the main source and buffer zone of groundwater pollution. Therefore, it is necessary to conduct unified analysis and simulation of the two....

AI Technical Summary

Problems solved by technology

This method is relatively simple and easy to implement, but there is an unavoidable quality error problem, and the accuracy of the coupling calculation cannot be guaranteed

The Q3D model is based on the fully coupled method. Although this method can guarantee the accuracy of coupling calculations, the implementation method is extremely complicated, and the stability and convergence are poor.

At present, these methods are difficult to obtain accurate and effective calculation results, so that accurate and reliable regional scale saturated-unsaturated water and solute transport information cannot be obtained.

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