Multi-model building method for underground water numerical simulation

Abstract

The invention discloses a multi-model building method for underground water numerical simulation. The method comprises the following steps that 1, a model 1# and a model 2# are built according to original terrain data and existing measured terrain data; 2, the initial mean and the initial variance of a permeability coefficient log are generated according to the permeability coefficient data obtained through collection and an in-situ hydrogeological test, each group of samples are generated according to an AM-MCMC algorithm, each group of the samples comprise permeability coefficient log values of the corresponding grid number, each group of the log values are converted and input into the model 1# for analog computation, 100 groups of parameters containing certain data are screened according to the acceptable conditions of analog computation, corresponding output data is obtained, and then the screen 100 groups of the parameters are input into the model 2# to obtain the corresponding output data; 3, analysis is conducted according to AICc criteria, the optimal value interval of the models is analyzed by calculating the model probability or weight on the basis of the AICc criteria. Accordingly, the precision of an underground water analog model is improved, and a basic model is provided for underground water environment self-purification simulation study.

Description

technical field [0001] The invention relates to the research field of multiple models for groundwater numerical simulation, in particular to a multi-model construction method for groundwater numerical simulation. Background technique [0002] Groundwater simulation technology has become the main method to study various problems of groundwater environment. The process of groundwater simulation is firstly to highly generalize the geological and hydrogeological conditions of the research object and obtain an ideal physical model, and then use concise mathematical language to describe its quantitative relationship and spatial form, so that it can reflect the geological, hydrogeological and physical conditions of the research object. Hydrogeological and groundwater dynamic characteristics, so as to achieve the purpose of numerically reproducing the basic situation of the actual water flow system. [0003] The spatial variation of hydrogeological parameters is the main source of ...

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Problems solved by technology

This kind of multi-model analysis has the problems of large data processing volume and many processing steps; and the high generalization of groundwater simulation by this multi-model analysis is not coordinated with the hydrogeological conditions and the complexity of the problem itself, which leads to the uncertainty of groundwater simulation. The emergence of the simulation results caused the deviation between the simulation prediction results and the actual situation, resulting in risks in the assessment and governance decision-making of groundwater environmental problems.

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