Reservoir area beach hydrothermal migration model construction method based on Ren model

Abstract

The invention discloses a reservoir area beach hydrothermal migration model construction method based on a Ren model, and the method comprises the steps: firstly constructing a reservoir area beach hydrothermal migration mathematic model based on a Richards equation and a thermal convection-diffusion equation, and describing the relation between a temperature field and a seepage field; setting boundary conditions for the reservoir area beach hydrothermal migration model, wherein the boundary conditions comprise boundary conditions of a seepage field and boundary conditions of a temperature field; and finally, solving the reservoir area beach hydrothermal migration model, and describing the relationship among the equivalent heat conductivity coefficient of the soil body, the water content and each physical parameter of the soil body by adopting a Ren model in the solving process, so as to obtain the space-time change characteristics of the temperature field in the reservoir area beach under the change condition. The problem that in the prior art, the influence mechanism of reservoir area beach hydrothermal migration under the changing condition cannot be accurately simulated due tothe factors that model parameters are difficult to determine, errors are large and the like is solved.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a method for constructing a water-heat migration model in a reservoir area based on a Ren model. Background technique [0002] Building dams for power generation and flood regulation and water storage are important engineering safeguards to support coordinated regional economic development, mitigate or avoid flood disasters, and achieve optimal allocation of water resources. However, the river is a dynamic highly open non-equilibrium nonlinear composite system, and the construction of dam projects will also have many negative effects on the sustainable development of the water environment of the river basin. For example, the storage and discharge of reservoirs will lead to changes in the hydrological regime of natural rivers, resulting in the redistribution of the seepage field and temperature field inside the downstream beach, which in turn affe...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for constructing a model of water and heat migration in the reservoir area based on the Ren model, which solves the problems in the prior art that the model parameters are difficult to determine and the error is large, which leads to the inability to accurately simulate the changing conditions. Influencing Mechanism of Thermal Coupling of Saturated-Unsaturated Flow in Reservoir Area

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