长江科学院院报2016，Vol.33Issue(8)：52-58,7.DOI:10.11988/ckyyb.20150497
汶川县渔子溪流域泥石流源区的崩滑体空间分布特征
Spatial Distribution Characteristics of Landslides and Collapse Masses in Debris Flow Formation Region along the Yuzixi River Basin of Wenchuan County, Sichuan Province
摘要
Abstract
In order to understand the characteristics of landslides and collapse masses transforming into debris flow , <br> we researched the landslides and collapse masses in debris flow formation area .In this paper , we took Yuzixi river basin between Yingxiu county and Wolong county as research area and 23 debris flow gullies as research objects . Area of the study region is about 396 km2 , and total area of debris flow basin is about 208 km2 .On the basis of in-terpretation of the landslide and collapse points with high resolution remote sensing images , in association with field investigation , we confirmed the reliability of the remote sensing interpretation , and finally obtained 2 741 disaster points with an area of 23.6 km2 .Then we employed GIS to calculate the distribution of the landslides and collapse points in aspects of elevation , gradient, dip, lithology and distance from the river .Results show that , firstly, most landslides and collapse masses exist in the elevation of 1 500-3 000 m; secondly , the area ratio of landslides and the collapse masses with slope gradient of 40°-50°is the largest; thirdly, slope direction is concentrated in the range of 90°-180 °, and slope direction of the range is perpendicular to the earthquake fault; furthermore, under earthquake or heavy rainfall ,harder diorite easily leads to a large number of landslides and collapse masses ;final-ly, landslide and collapse easily break out when mountains are near the river .关键词
滑坡/渔子溪流域/崩塌/泥石流/空间分布特征Key words
landslide/Yuzixi River/collapse/debris flow/spatial distribution characteristics分类
天文与地球科学引用本文复制引用
程霄,朱静,王帅永,方群生,张卫旭..汶川县渔子溪流域泥石流源区的崩滑体空间分布特征[J].长江科学院院报,2016,33(8):52-58,7.基金项目
国家科技基础性工作专项（2011FY110100－3）；国家重点实验室团队项目 （）
