ANALYSIS OF GEOMORPHOLOGIC CHARACTERISTICS OF THE YAMZHO YUMCO REGION BASED ON ASTER-GDEM

CHEN Qi-guang; SHAO Zhao-gang; HAN Jian-en; MENG Xian-gang; YU Jia; WANG Jin

2014 Vol. 20, No. 3

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CHEN Qi-guang, SHAO Zhao-gang, HAN Jian-en, MENG Xian-gang, YU Jia, WANG Jin. ANALYSIS OF GEOMORPHOLOGIC CHARACTERISTICS OF THE YAMZHO YUMCO REGION BASED ON ASTER-GDEM[J]. Journal of Geomechanics, 2014, 20(3): 304-316.

Citation:

CHEN Qi-guang, SHAO Zhao-gang, HAN Jian-en, MENG Xian-gang, YU Jia, WANG Jin. ANALYSIS OF GEOMORPHOLOGIC CHARACTERISTICS OF THE YAMZHO YUMCO REGION BASED ON ASTER-GDEM[J]. Journal of Geomechanics, 2014, 20(3): 304-316.

ANALYSIS OF GEOMORPHOLOGIC CHARACTERISTICS OF THE YAMZHO YUMCO REGION BASED ON ASTER-GDEM

Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

Received Date: 14 May 2014

Publish Date: 25 September 2014

Abstract

Abstract

The DEM data, gradually advancing, is applied widespreadly in the analysis of geomorphic. In order to provide important evidences for the tectonic pattern and evolution process of geomorphy in the study area, with detailed field survey and verification as well as searching and compare with former regional geologic data, the characteristics of tectonic geomorphy have been studied, based on data of ASTER-GDEM, the utilization of GIS spatial analysis statistic technology, statistics of geomorphic parameters including the terrain elevation(including the average elevation, the maximum elevation and the minimum elevation), the terrain fluctuation and the surface gradient, graphic and mathematic analysis of the strip profile and the area-elevation integral. The result shows that the study area, characterized by the EW directional basin geomorphy, with highest altitude of 7515 m and lowest altitude of 2581 m, belongs to the area of high-extremely high altitude, while areas within the watershed mainly exhibits geomorphy of plain and hill. With the average fluctuation of 314 m, average gradient of 19°, the terrain fluctuates little and shows layered geomorphy of three grades. The edge of the basin is controlled by faults, where tectonic phenomena develop with obvious characteristics of linear imagines. The east and west part are controlled by the Sangri-Cuona fault belt and the Yadong-Lugu fault belt respectively, in which multi-period tectonic activities are revealed by the elevation profile. Additionally, the south and north part of the watershed basin is controlled by the Rongbu-Zhegu fault and the Qiuduojiang fault, and the faulting in north is more intensive than that in south. Influenced by the combined action of tectonic activities and surface water flow, the geomorphy has entered the aging stage of evolution.
- ASTER-GDEM /
- Yamzho Yumco /
- geomorphologic /
- curve of hypsometric integral

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References

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