基于ASTER遥感影像武都区松散堆积物研究  

Research on loose deposits based on ASTER images in Wudu, Gansu

作　　者：崔志杰[1] 郭鹏[1] 熊木齐[1] 庆丰[1] 张毅[1] 曾宇桐 孟兴民[1] 

机构地区：[1]兰州大学西部环境教育部重点实验室,兰州730000

出　　处：《兰州大学学报（自然科学版）》2014年第5期739-744,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：国家科技支撑计划项目(2011BAK12B06);国家自然科学基金项目(41172328);甘肃省科技重大专项计划项目(1102FKDA007);国家重点基础研究发展计划(973计划)项目(2014CB744703)

摘　　要：以甘肃南部白龙江流域武都区段为例,判识孕育松散堆积物的特殊地层岩性,遴选出对地层岩性敏感的波段,并采用最大似然分类方法,解译、提取松散堆积物.结果显示:风化基岩、黄土的面积分别为657.48,1 180.95 km2,两者占武都区总面积的39.68%;在松散堆积物密集分布区,已发生灾害272处,灾害点占武都区总灾害点的54%,在强降雨条件下,灾害易发性较大.Wudu, which is located in Bailong River catchment, was selected as the study area to identify the lithology that can produce loose material sediments, select better wavelengths that are sensitive to lithology and interpret loose materials by using maximum likelihood classification. The results indicated that the area of weathered bedrock and loess is 657.48 and 1 180.95 km^2, occupying about 39.68% of the total Wudu area. In regions with rich loose material sources, 272 debris flow events had occurred before, accounting for 54% of the total number of debris flow events in Wudu District, and such regions are much more prone to debris flows when three is a heavy rainfall.

关 键 词：ASTER 泥石流 地层岩性 松散堆积物 武都区 

分 类 号：P642.22[天文地球—工程地质学]