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Groundwater numerical simulation method based on water circulation

A numerical simulation and groundwater technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of affecting simulation accuracy, time-consuming operation, difficult to popularize, etc. The effect of promoting the application

Active Publication Date: 2012-07-11
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

The problem is that when the grid unit scale is too large, the water cycle simulation will produce obvious scale effects, which will affect the simulation accuracy. During the application process, the grid unit needs to be controlled within a smaller scale range.
For large watersheds or regions, the scale of grid units will be very large when modeling, resulting in very time-consuming operation, which requires high storage capacity and computing power of the hardware system
At the same time, since the grid unit is shared by the groundwater numerical simulation system and the water cycle simulation system, the huge grid unit size will seriously affect the operating efficiency of the groundwater numerical simulation system
Second, although the water cycle simulation system based on grid units has a strong physical mechanism, its general structure is relatively complex, requiring a large number of parameters and data support, which is highly professional and difficult for ordinary users to grasp.
Based on the above reasons, although the grid-based interactive water cycle simulation and groundwater numerical simulation technology are relatively advanced, they are still only suitable for application in small-scale watersheds / regions, and are not easy to promote.

Method used

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  • Groundwater numerical simulation method based on water circulation
  • Groundwater numerical simulation method based on water circulation
  • Groundwater numerical simulation method based on water circulation

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Embodiment 1

[0033] This embodiment is a large-scale groundwater numerical simulation method based on water cycle simulation. The method described in this embodiment can be compiled as a computer program and run on a PC or other general-purpose computers. The steps of the method described in this embodiment are as follows:

[0034] 1) Steps to establish a water cycle simulation system: use the water cycle simulation method based on the sub-basin spatially discrete model to determine the temporal and spatial distribution of the vertical circulation flux of groundwater in a large-scale area, thereby generating the data required for groundwater numerical simulation information;

[0035] 2) Steps to establish a groundwater numerical simulation system: it is used to simulate the lateral flow of groundwater in the study area by adopting the groundwater numerical simulation system based on the rectangular grid unit spatial discretization technology. The simulation principle is based on the follo...

Embodiment 2

[0093] This embodiment is an improvement of the first embodiment, and is a refinement of the first embodiment regarding spatial nesting processing. The "spatial nesting process" described in this embodiment includes the following sub-steps:

[0094] 1) Determine the spatial relationship between subwatersheds and grid cells. Use ARCGIS or other general geographic information system tools to spatially superimpose the multiple sub-basins divided by the water cycle simulation system and the multiple grid units divided by the groundwater numerical simulation system, so as to obtain the sub-basins and grid units in the simulation area affiliation relationship. That is, for a specific sub-basin, determine the number and position of grid cells that overlap with it and record them. The geographic information system tool is a software tool for analyzing and managing multiple geographic spatial entity data and their relationships, such as ARCGIS, ARCVIEW, MAPGIS, and MAPWINDOW, which a...

Embodiment 3

[0099] This embodiment is an improvement of the first embodiment, and is a refinement of the first embodiment regarding synchronous coupling. As mentioned earlier, synchronous coupling refers to the interactive feedback between two systems completing information within the same time step. A time step is a time segment during simulation or simulation. The entire simulation period is composed of multiple time steps, and the two systems are coupled synchronously for each time step until the end of the simulation. Within a time step, the "synchronous coupling" described in this embodiment includes the following sub-process steps:

[0100] 1) In a time step, the water cycle simulation system first completes the water cycle simulation of this time step, and calculates the various fluxes of the groundwater cycle in each sub-basin, where the vertical circulation flux related to groundwater includes precipitation infiltration Recharge, seepage recharge of surface water bodies such as ...

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Abstract

The invention relates to an underground numerical simulation method based on water circulation. The method comprises the steps of establishing a water circulation simulation system, establishing an underground numerical simulation system, taking day scale as time step, forming the synchro coupling between the water circulation simulation system and the underground numerical simulation system through two-way information interaction of the two systems within the time step, so as to form a solution which can be suitable for large-scale underground numerical simulation application. The method adopts water circulation simulation based on sub-basin spatial spreading, and realizes the application ability in conditions of large space scale basin or region and long simulation period. The invention adopts a finite difference method, and ensures that water circulation simulation and underground numerical simulation processes have two-way feedback capability. The method also adopts the mode that areas of a grid unit and a sub-basin are directly superposed, improves the data processing operation efficiency. The method is universal and easy to popularize and apply.

Description

technical field [0001] The invention relates to a groundwater numerical simulation method based on water circulation, which is a method for rapidly processing data information of hydrological water resources, and a method for processing data information of hydrological resources by simulating and establishing a mathematical model. Background technique [0002] Regarding the groundwater numerical simulation technology and its system, the current technologies mainly include the following types. One is pure groundwater numerical simulation technology and system, which only simulates the circulation process of groundwater itself, without considering the information interaction and mutual influence between groundwater circulation and external water circulation conditions. There are many such simulation technologies and systems, representative simulation technologies and related systems include Visual Modflow, FEFLOW, Visual Groundwater and so on. The second is the coupling metho...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 陆垂裕秦大庸王浩
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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