Analysis of Geological Environment Characteristics by Remote Sensing Detection in Karst Mountain Area，Southeast Yunnan#br#

doi:10.3969/j.issn.1009-0479.2020.03.007

Abstract

Abstract: Abstract:Yunnan is located in the southwestern border of China.It is one of the prowinces with the most extensive karst distribution and severe rocky desertification in China.The area of rocky desertification is conlinuously expanding and the ecological environment is gradually deleriorating. It is urgent to use remote sensing technology to quickly monitor rocky desertification.On the basis of field investigations，the remote sensing technology was used to delect and analyze the karst landforms，regonal fault sluctures and lithological distribution of karst mountainous areas in southeasterm Yunnan，and to analyze the relationship between karst rock desertification and geological environment in the study area.The types of karst landforms have obvious correlation with the degree of rocky desertification.Severe rocky desertification mostly occurs in the peak cluster depressions and peak forest depressions. The areas without rocky desertification and potential rocky desertification are mostly located in karst mountains and karst trough valleys.Like karst plains，there are some mild and moderate rocky desertification in karst hills and karst basins and regional fault structures have an important impact on the development space and distribution area of rocky desertification，and areas with severe rocky desertification are mainly concentrated in the Red River，Kaiyuan-Qiubei fault and Guangnan-Funing fault. There are also some continuous rocky desertification areas in the middle of the Xiaojiang fault and the Mile-Luoping fault, and the west of the Xiaojiang fault is mostly a rock less desertification area.Lithology type plays a significant role in controlling the spatial distribution pattern of rocky desertification.Rock less desertification and potential rocky desertification are mostly distributed in non-carbonate areas , and rocky descrtification is mainly concentrated in carbonate areas and the rocky desertification phenomenon is serious in the pure limestone area, mostly in the intensity and moderate rocky desertification area.

Key words: remolc sensing detection, geological environment, karst mountain area, rocky desertification, Southeast Yunnan

CLC Number:

P23
TP79

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