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Method and device for dynamically predicting an ecological critical groundwater level in a mining area based on a single exponential model

A technology of critical groundwater level and exponential model, which is applied in forecasting, data processing applications, electrical digital data processing, etc., can solve problems such as dynamic prediction without critical groundwater level, and achieve dynamic estimation, simple operation steps, and accurate estimation results Effect

Active Publication Date: 2019-01-25
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology

But so far, there is no dynamic prediction of the critical groundwater level, and there is a lack of appropriate methods to make a dynamic prediction of the ecological critical groundwater level in arid mining areas

Method used

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  • Method and device for dynamically predicting an ecological critical groundwater level in a mining area based on a single exponential model
  • Method and device for dynamically predicting an ecological critical groundwater level in a mining area based on a single exponential model
  • Method and device for dynamically predicting an ecological critical groundwater level in a mining area based on a single exponential model

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Experimental program
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Embodiment

[0042] Such as Figure 1-3 As shown, a dynamic estimation method for the ecological critical groundwater level in arid mining areas based on a single exponential model, including the collection and processing of basic data 1, the construction of soil hydrodynamic equations to inversely calculate transpiration 2, and the mapping of Ta / Tp and groundwater in different time periods Burial depth curve 3, single exponential model fitting curve reverse calculation of critical groundwater buried depth in different time periods 4;

[0043] Basic data collection and processing 1, including upper boundary meteorological data 1-1, lower boundary water table 1-2, initial condition moisture content 1-3, soil hydraulic parameters 1-4, vegetation root system parameters 1-5, leaf area index 1-6. Through the above parameters, the soil hydrodynamic equation 2-1 with vegetation water absorption can be constructed. The above parameters can be input into the HYDRUS finite element simulation softwar...

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Abstract

The invention relates to a method and a device for predicting an ecological critical groundwater level in a mining area based on a single exponential model. The method includes data collection step ofcollecting parameters needed for constructing soil hydrodynamic equation;an equation constructing step of constructing a soil hydrodynamic equation with vegetation water absorption by using the parameters; A curve fitting step of inversely obtaining actual and potential transpiration by using the soil hydrodynamic equation, and adopting a single exponential model to fit the relationship curves ofthe ratio of actual transpiration to potential transpiration and the groundwater table depth in different time periods; a water level estimation step of estimating a critical groundwater depth of vegetation in different months by using the relationship curve. The single index model introduced by the invention can accurately fit the relationship curve between Ta / Tp (ratio of actual transpiration to potential transpiration of vegetation) and groundwater depth, and the estimation result is more accurate.

Description

technical field [0001] The invention relates to a groundwater level prediction method and device, belonging to the technical field of coal mining, in particular to a mining area ecological critical groundwater level prediction method and device based on a single-exponential model. Background technique [0002] There is a good correlation between groundwater depth and vegetation growth in arid mining areas. When the groundwater level is lower than the critical groundwater level, the vegetation ecology will be degraded. The mining of coal resources has changed the lithological structure of the aquifer and the vadose zone, and to a certain extent changed the supply, discharge, runoff conditions of groundwater and the law of water migration in the vadose zone, causing the temporal and spatial changes in the groundwater level and the water content of the vadose zone. Changes, and then affect the vegetation ecology that relies on groundwater and vadose zone water for survival, and...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02G06F30/23
Inventor 王强民刘基周振方孙洁柳昭星董兴玲尚宏波
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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