Citation: | LIU Xiao-tong, ZHANG Xu-jiao, YE Pei-sheng, HE Ze-xin, FU Lian-zhen, JIA Li-yun, HE Xiang-li. EXTRACTION OF TECTONIC GEOMORPHOLOGIC PARAMETRES BASED ON DEM AND ANALYSIS OF DIFFERENCE ON TECTONIC ACTIVITY ABOUT LANGSHAN MOUNTAIN, INNER MONGOLIA[J]. Journal of Geomechanics, 2016, 22(1): 152-161. |
This paper extracted the drainage basins of 15 rivers on the southeast slope of Langshan Mountain and narrowly calculated their HI values using ArcGIS10.0 based on 30 meter resolution DEM data, then analysed the tectonic activities and geomophological evolutions in this region. The results showed that the HI values of 8 rivers were between 0.3 and 0.6, indicating that these rivers were in their mature stage; the HI values of 7 rivers were greater than 0.6, stating clearly that these rivers were in their juvenile stage. Moreover, there were no rivers in old age. The HI values of V1~V14 changed gently, with the tectonic movement first increasing and then decreasing. The area-altitude points of V14~V22 changed tempestuously, especially rivers V14~V19, which showed a clear upward trend and the river eroded remnant volume increased in the result the tectonic activity decreased. HI values the rivers north of V19 continued to decline, and its tectonic activity increased. The Langshan Mountain was suggested in enhanced-weakening-enhanced diversity state of motion from the southwest to the northeast with the conclusion of previous work in tectonic geomorphology of the consistent results.
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Sketch map of study area
the distribution of rivers in study area
Drainage density of valley
Thechanges of HI value
relif and HI value on the velly
The changes of tectonic movement in study area
chenges of tectonic movements in Langshan