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A Method for Evaluating Contaminant Transport Characteristics in Unfilled Rough Single Fractures

A pollutant, single-fracture technology, applied in flow characteristics, instruments, measuring devices, etc., can solve problems such as the inability to accurately evaluate the impact of the migration process

Active Publication Date: 2019-05-31
NANJING HYDRAULIC RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most scholars equivalent non-filled rough fractures based on the local cubic law. Although good research results have been achieved, they cannot accurately evaluate the impact of rough fractures on water flow and pollutant migration processes.

Method used

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  • A Method for Evaluating Contaminant Transport Characteristics in Unfilled Rough Single Fractures
  • A Method for Evaluating Contaminant Transport Characteristics in Unfilled Rough Single Fractures
  • A Method for Evaluating Contaminant Transport Characteristics in Unfilled Rough Single Fractures

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0023] figure 1 It is a flowchart of a method for evaluating the migration characteristics of pollutants in rough single cracks without filling in the present invention; the present invention proposes a method for evaluating the migration characteristics of pollutants in rough single cracks without filling, which is characterized in that it specifically includes : Firstly, determine the type and solubility of pollutants, and distinguish them into soluble pollutants and non-aqueous liquid pollutants; secondly, use fractal theory to establish a rough single-crack model; thirdly, establish a rough single-crack numerical model without filling based on the finite element method; Finally, the convect...

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Abstract

The invention discloses a method for evaluating the migration characteristic of pollutants in a no-filling rough single fracture. The method concretely comprises the following steps: determining the kind and the dissolvability of the pollutants; establishing a rough single fracture model by using a fractal theory; establishing a no-filling rough single fracture value model based on a finite element technology; evaluating the migration process of the pollutants in the fracture by using a convection-dispersion equation for soluble pollutants; and evaluating the migration process of the pollutants in the fracture by using a level set technology for non-aqueous phase liquid pollutants. The method has the following advantages: 1, evaluation of the migration characteristic of the soluble pollutants in the fracture is realized; 2, evaluation of the migration characteristic of the non-aqueous phase liquid pollutants in the fracture is realized; and 3, migration parameters of the pollutants in the fracture, obtained in the invention, can be used as underground water pollution repairing base parameters.

Description

technical field [0001] The invention relates to a method for evaluating the migration characteristics of pollutants in unfilled rough single cracks, and belongs to the technical field of pollutant migration characteristics evaluation. Background technique [0002] Groundwater pollution is a major problem facing groundwater resources at present. To solve the problem of groundwater pollution, it is necessary to solve the two major problems of pollutant migration and restoration in the aquifer medium. Accurate evaluation of the migration characteristics of pollutants in the aquifer medium is an effective method for groundwater pollution. Basic premise of restoration. Aquifers are mainly divided into porous aquifers, fractured aquifers and karst aquifers according to the type of medium. The research on pollutant migration and restoration in porous aquifers is the earliest and the results are the most abundant. However, the height of fractured aquifers and karst aquifers is very ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/00
CPCG01N11/00
Inventor 戴云峰周志芳韩江波林锦
Owner NANJING HYDRAULIC RES INST
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