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[1]CHENG Li-lai,WU Jun-feng.The Characteristics and Its Risk Evaluation Study of Xiaohegou Debris Flows, Right Bank of Daduhe River[J].Research of Soil and Water Conservation,2011,18(01):87-91,96.

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The Characteristics and Its Risk Evaluation Study of Xiaohegou Debris Flows, Right Bank of Daduhe River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 01 Page number: 87-91,96 Column: Public date: 2011-02-20

Title:: The Characteristics and Its Risk Evaluation Study of Xiaohegou Debris Flows, Right Bank of Daduhe River

Author(s):: CHENG Li-lai¹, WU Jun-feng²; 1. Geophysical Prospecting Team of He’nan Geological and Mineral Bureau, Zhengzhou 450053, China;
2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China

Keywords:: debris flow of Xiaoheyou; characteristics; risk evaluation

CLC:: P642.23

DOI:: -

Abstract:: Xiaohegou debris flows, right bank of Daduhe River, Detuo Commune, Luding County, Sichuan Province, is located in the reservoir region and the S211 pass from the mouth of the gully. A large scale debris flow happened in 2009, if the activities of the gully will happen in the future, it influenced not only the reservoir but also S211. By high accuracy remote sensing, the large scale geological mapping and geohazard risk analysis reveals that the Xiaohegou debris flow is developing one, with favorite landform. The source region is covered with rich colluvial, fluvial and landslide accumulation, the rainfall is rich and concentrated in the Summer, geological survey reveals that it is a medium easy-happening, storm type, medium frequency, viscous debris flow with large fatalness. The sand supply of 20-year debris flow to Dagangshan reservoir is about 5 400 m³, but it will frighten the safety of S211.

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