Spatial Distribution of Rockfalls and Landslides in Northern Area of Heishui River Basin in Panzhihua-Xichang Region

LI Yuan-liang, REN Guang-ming, HUANG Xi-chao,YANG Lei, FAN Rong-quan

Journal of Changjiang River Scientific Research Institute ›› 2016, Vol. 33 ›› Issue (10) : 57-62.

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Journal of Changjiang River Scientific Research Institute ›› 2016, Vol. 33 ›› Issue (10) : 57-62. DOI: 10.11988/ckyyb.20151029
ENGINEERING SAFETY AND DISASTER PREVENTION

Spatial Distribution of Rockfalls and Landslides in Northern Area of Heishui River Basin in Panzhihua-Xichang Region

  • LI Yuan-liang1, REN Guang-ming1, HUANG Xi-chao1,YANG Lei2, FAN Rong-quan3
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Abstract

:Geological disasters are highly prone to take place in the northern area of Heishui river basin in the Panzhihua-Xichang region. The distribution rules of rockfalls and landslides in the region are researched based on field investigation and high-precision remote sensing image interpretation in association with ArcGIS. The main results are concluded as follows: 1) there are 76 rockfalls and 487 landslides in the study area and 93.4% of the landslides are distributed in slope with gradient of 10°-40°,and 47.4% of the rockfalls are distributed in slope with gradient of 40°-50°; 2) the types and susceptibility of mountain hazard are determined by the combination characteristic and mechanical strength of rock and soil mass in macro scale; 3) at present earthquake activity in the study area is relatively quiet, but faults also have influence on the development of landfalls within a distance of 500m and landslides of 300m, and large-scale landslides and rockfalls usually develop at regions traversed by faults; 4) the distribution of landslides is controlled by river water system in macro sense; 5) roads have influence on the development of landslides within a distance of 300 meters.

Key words

Heishui river basin / rockfall / landslide / distribution rules / ArcGIS

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LI Yuan-liang, REN Guang-ming, HUANG Xi-chao,YANG Lei, FAN Rong-quan. Spatial Distribution of Rockfalls and Landslides in Northern Area of Heishui River Basin in Panzhihua-Xichang Region[J]. Journal of Changjiang River Scientific Research Institute. 2016, 33(10): 57-62 https://doi.org/10.11988/ckyyb.20151029

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