Monitoring well arrangement and tracer agent injection boundary determination method for leakage detection of landfill

A technique for determining methods and tracers, applied in special data processing applications, complex mathematical operations, instruments, etc., to achieve good reliability results

Pending Publication Date: 2022-03-29
ZHEJIANG UNIV
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Problems solved by technology

However, the migration law of the tracer in the landfill system is not yet clear. In order to determine the injection amount of the tracer in the injection well and determine the layout method of the monitoring well, it is very necessary to understand its migration in the landfill law

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  • Monitoring well arrangement and tracer agent injection boundary determination method for leakage detection of landfill
  • Monitoring well arrangement and tracer agent injection boundary determination method for leakage detection of landfill
  • Monitoring well arrangement and tracer agent injection boundary determination method for leakage detection of landfill

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[0065] specific implementation

[0066] The present invention is further described below with reference to the accompanying drawings and embodiments, but is not limited to the scope of implementation of the present invention.

[0067] The present invention mainly determines the scale of the landfill according to the design drawings of the landfill, mainly including the depth of the landfill and the thickness l of the bottom liner 3 , the thickness of the garbage body l 1 and cover thickness l 2 . Through field detection, the water content of the landfill waste body, the water content of the upper liner, the type of cover layer and bottom liner material are obtained, and the diffusion coefficient and convection rate of the tracer in the landfill system are determined. Establish the tracer injection boundary conditions in the injection wells and the layout of the monitoring wells.

[0068] The present invention is hereinafter referred to as SF 6 The calculation of the migra...

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Abstract

The invention discloses a monitoring well arrangement and tracer agent injection boundary determination method for landfill leakage detection. The invention aims to determine the injection amount of the tracer in the on-site tracer test injection well and the arrangement of the monitoring well by using the migration rule of the tracer in the landfill body and the barrier barrier. The diffusion and convection effects of a tracer in a landfill body and a barrier barrier are considered, a two-dimensional control equation of migration of the tracer is established in combination with the Fick law, the Darcy law and a mass conservation equation, and a solution of the equation is obtained through Laplace-Fourier transform and Talbot numerical inversion. According to different characteristics of sizes, porosity, permeability characteristics and the like of a landfill covering layer, a garbage body and a bottom liner, the injection amount of a tracer agent and the arrangement method of a barrier leakage monitoring well are determined. The method provided by the invention is efficient and reliable in calculation, can be used for leakage detection and efficient positioning of the in-service landfill barrier, and has important engineering value for treatment of the landfill.

Description

technical field [0001] The invention belongs to the field of landfill leakage monitoring, and particularly relates to a monitoring well arrangement and a tracer injection boundary determination method for landfill leakage detection. Background technique [0002] The landfill is composed of cover layer, garbage body and bottom liner, and through the bottom liner and cover layer, the pollution of the landfill to groundwater, soil and atmosphere is reduced. However, due to factors such as construction, dry-wet cycles and climate change, the geomembranes that make up the cover layer and bottom liner of the landfill are prone to defects such as tearing, leaks, and clay cracking. This causes landfill gas to escape from the overburden and leachate to escape from the bottom liner, contaminating the atmosphere and groundwater. Assuming that the performance of other facilities in the landfill remains good, the leakage of leachate from a 25cm diameter hole in the bottom liner can reac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/11G06F111/10G06F113/08
CPCG06F30/20G06F17/11G06F2111/10G06F2113/08
Inventor 王巧谢海建费爽珂丁昊詹良通陈赟
Owner ZHEJIANG UNIV
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