A method for simulating the interaction between lake and groundwater unsteady flow

A simulation method and groundwater technology, applied in CAD numerical modeling, special data processing applications, instruments, etc., to achieve the effects of ensuring continuity, increasing method applicability, and avoiding numerical oscillations

Active Publication Date: 2021-05-04
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0004] The purpose of the invention is to propose a method for simulating the unsteady flow of lakes and groundwater, which solves the following problems in the prior art of simulating the interaction of lakes and groundwater:

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  • A method for simulating the interaction between lake and groundwater unsteady flow
  • A method for simulating the interaction between lake and groundwater unsteady flow
  • A method for simulating the interaction between lake and groundwater unsteady flow

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Embodiment Construction

[0049] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the implementations shown and described in the drawings are only exemplary, intended to explain the principle and spirit of the present invention, rather than limit the scope of the present invention.

[0050] The embodiment of the present invention provides a method for simulating the unsteady flow of lakes and groundwater, such as figure 1 As shown, including the following steps S1-S10:

[0051] S1. Perform discretization processing and boundary continuity processing on the lakes to obtain grid units of each lake.

[0052] Step S1 specifically includes:

[0053] S1-1. Discretize the lake.

[0054] The spatial discretization of the lake is the premise and basis for the coupled simulation of the lake-groundwater interaction, which largely determines the choice of the calculation method. The processing process in the em...

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Abstract

The invention discloses a method for simulating the unsteady flow of lakes and groundwater, which describes the lake water balance process in detail, effectively reduces the dependence of the lake's spatial discretization on the subdivision of the groundwater grid system, and adopts an algorithm for tilting the bottom of the lake To solve the problem of continuity of lake-groundwater interaction boundary conditions, on the one hand, without reducing the discretization accuracy of lake space, it can reduce unnecessary vertical subdivision layers of groundwater aquifers, thereby effectively reducing the workload of simulation calculations. The convenience of application is greatly enhanced. On the other hand, it also effectively avoids the numerical oscillation problem caused by the large number of vertical subdivision layers in the simulation process, and improves the convergence stability of simulation calculation. Compared with the existing lake-groundwater interaction simulation method, the present invention has significant advantages in application convenience and calculation stability, and can be widely used in quantitative analytical research on lake-groundwater interaction.

Description

technical field [0001] The invention belongs to the technical field of groundwater numerical simulation, and in particular relates to the design of a simulation method for unsteady flow interaction between lakes and groundwater. Background technique [0002] When lakes and surface aquifers have a direct hydraulic relationship, there can be significant impacts on the lake and groundwater systems, so a technique was developed to quantify the interaction between lakes and groundwater to assess the impact of changes in equilibrium conditions on one side on the other. It is of great significance to regional water resource management. Unlike other surface water bodies such as reservoirs, the water level of a lake is not a definite value, but is related to its own water balance process, which is difficult to assess. At present, the methods for analyzing the interaction between lakes and groundwater mainly include experimental methods and model simulation methods. However, compare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/10G06F113/08
CPCG06F30/20G06F2111/10
Inventor 陆垂裕赵勇孙青言王建华曹国亮王浩严聆嘉张博李天辰刘建刚
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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