Numerical simulation method and device for regional hidden pipe layout and drainage and salt discharge

Abstract

The invention provides a numerical simulation method and device for regional hidden pipe layout and drainage and salt discharge, which can determine reasonable dark pipe parameters and water-salt dynamics under the condition of large-scale dark pipe layout. The method provided by the present invention comprises: step 1. collecting basic data of the research area; step 2. establishing groundwater flow and solute mathematical models in the research area based on the basic data collected in step 1; step 3. combining the basic data to establish groundwater flow in the research area , solute numerical model, discretize time and space, define the model boundary, input the initial groundwater level and salinity, geological parameters and upper boundary source and sink; step 4. calibration and verification model; step 5. refine the network in the dark drainage area Based on the hidden pipe layout historical data, determine the hidden pipe layout parameters; Step 6. Simulate the regional water and salt dynamics under the concealed pipe drainage condition, output the drainage and salt discharge amount, and adjust the hidden pipe layout parameters and the hidden drainage area according to the design objectives and the actual situation of the area Arrangement methods to achieve the design goal of the concealed row system.

Description

technical field [0001] The invention belongs to the technical field of simulated concealed pipe layout for agricultural drainage and salt discharge, and in particular relates to a large-scale concealed pipe layout in saline-alkali areas and a numerical simulation method and device for drainage and salt discharge. Background technique [0002] Soil salinization is a worldwide resource problem and ecological problem, and it is one of the main reasons for the shortage of cultivated land resources and the deterioration of the ecological environment. The underground pipe has a very obvious effect on the improvement of soil salinization, which can effectively reduce the salt content of the soil and improve the physical and chemical properties of the saline-alkali land. The key point in the study of underground pipe drainage and salt discharge is the engineering layout of the underground pipe. The determination of the buried depth, spacing and radius of the underground pipe is the ...

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Problems solved by technology

However, this method is only for specific situations, such as fixed crops and specific regions, and the test period is long, the cost is high, and the index determination is complicated.

Most of the current computer simulation programs cannot reflect the groundwater level and water quality of the entire area under the condition of large-scale underground pipe layout, and cannot determine the drainage and salt discharge effect of the entire area's underground pipe system

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