Lake-underground water unsteady flow action simulation method

A simulation method and unsteady flow technology, applied in CAD numerical modeling, special data processing applications, instruments, etc., to increase the applicability of the method, ensure continuity, and avoid numerical oscillation

Active Publication Date: 2018-11-06
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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  • Lake-underground water unsteady flow action simulation method
  • Lake-underground water unsteady flow action simulation method
  • Lake-underground water unsteady flow action simulation method

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[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 lake-underground water unsteady flow action simulation method. According to the method, the lake water balance process is detailedly described, the dependency, on undergroundwater grid system subdivision, of space discretization of lakes is effectively reduced, an inclined lake bottom algorithm is used for solving the continuity problem of lake-underwater action boundaryconditions, so that the unnecessary vertical subdivision layer number of underwater aquifers can be decreased without reducing the lake space discretization precision on one hand, thereby effectivelyreducing the workload of simulation calculation and greatly strengthening the convenience during the application, and the numerical oscillation problem caused by relatively high vertical subdivisionlayer number in the simulation process is effectively avoided on the other hand, thereby improving the convergence stability of the simulation calculation. Compared with existing lake-underwater interaction simulation method, the method has remarkable advantages in the aspects of application convenience and calculation stability, and can be widely applied to quantitative analysis and research of lake-underwater 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 resources 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, compar...

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Application Information

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IPC IPC(8): G06F17/50
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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