Plateau hot karst lake identification method based on gas dissipation causes

An identification method and dissipation technology, applied in the field of geochemical and geophysical exploration, can solve the problems of long identification period, complicated operation, and difficult identification of plateau thermokarst lakes, and achieve the effect of simple measurement operation and low measurement cost

Active Publication Date: 2021-01-22
中国地质科学院地球物理地球化学勘查研究所
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Problems solved by technology

[0009] Aiming at the problems of long period, complex operation and difficult identification of the existing plateau thermokarst lake identification technology, the present invention provides a plateau thermokarst lake identification method based on the cause of gas escape

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  • Plateau hot karst lake identification method based on gas dissipation causes

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Embodiment Construction

[0024] The specific embodiment of the present invention will be further described below in conjunction with specific embodiment:

[0025] Taking the permafrost region of the Qilian Mountains in the Qinghai-Tibet Plateau of China as an example, a plateau thermokarst lake identification method based on the cause of gas dissipation proposed by the present invention is used to identify plateau thermokarst lakes, which specifically includes the following steps:

[0026] Step 1. Select the permafrost region of the Qilian Mountains in the Qinghai-Tibet Plateau of China as the research area. There are many common penetrating and non-penetrating thermokarst lakes in this area. The thermokarst lake AJ is selected as the target lake. Exploration observations revealed signs of collapse at the shore edge of the target lake. In summer, thermal karst lake AJ developed bubbles underwater, and there were many cold springs in the 200-300m area around the lake AJ. Most of them were aggregated and...

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Abstract

The invention discloses a plateau hot karst lake identification method based on gas dissipation causes, and particularly relates to the field of geochemical geophysical exploration. According to the method, a terrain relative altitude difference distribution diagram of a research area is obtained by investigating physical properties of the ground around a target lake in the research area and combining a micro-landform technology, a radar wave instantaneous frequency spectrum is obtained by detecting the research area through a low-frequency ground penetrating radar, and frozen soil layer faults and fracture causes are analyzed. The research area is measured by utilizing an audio magnetotelluric depth finder to obtain a frozen soil bottom plate thickness map, frozen soil distribution conditions in the research area are analyzed, a fracture structure of a target lakebed deep part is determined, and finally a soil methane gas content distribution map of the research area is drawn based ona geochemical detection technology. And the target lake is determined to be the plateau hot karst lake based on the gas dissipation causes according to the distribution condition of the soil methanegas content values. According to the method, a ground measurement and identification technology is adopted, the method is simple and easy to implement, and the plateau hot karst lake based on the gasdissipation causes is effectively identified.

Description

technical field [0001] The invention relates to the field of geochemical and geophysical exploration, in particular to a method for identifying plateau thermokarst lakes based on the cause of gas dissipation. Background technique [0002] The types of lakes and ponds on the Qinghai-Tibet Plateau include thermal karst lakes, tectonic lakes, eolian lakes, and lakes formed by glaciers. The area of ​​lakes and ponds in the whole region accounts for 37.2% of the total area of ​​lakes and ponds in my country. Control of special geological and geographical factors. The generation and development of plateau thermokarst lakes are closely related to the ecological environment, water resources and engineering in cold regions. At present, under the influence of global climate change and human engineering activities, the permafrost on the Qinghai-Tibet Plateau has been in the process of degradation for a long time, resulting in regional freezing. Changes in the soil environment lead to t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00G01S13/88
CPCG01V11/00G01S13/885
Inventor 杜炳锐裴发根张舜尧白大为何梅兴
Owner 中国地质科学院地球物理地球化学勘查研究所
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