冀西北地区泥石流发育的环境因素遥感研究  

Study on the environmental factors affecting debris-flow development using landsat-TM Image in Northwest Hebei Province

作　　者：乔彦肖 邓素贞[1] 张少才 

机构地区：[1]河北省地调院 [2]河北省水文工程地质勘察院,河北石家庄050021

出　　处：《中国地质灾害与防治学报》2004年第3期106-110,共5页The Chinese Journal of Geological Hazard and Control

摘　　要：文章介绍了利用Landsat TM遥感图像对影响泥石流发育的环境因素所作的定量研究。该项研究以在冀西北1 8万km2范围内解译出的339条(处)泥石流沟作为研究对象,在全面分析了该区影响泥石流发育的环境因素后,选择出植被盖度、岩石类别、沟床坡降、流域平面形态、地形地貌特征等5项因素,通过提取遥感图像特征进行分级细化和定量研究。采取大样本统计方法,得出每种因素在不同状态下与泥石流发育的关系,定量表示不同发育状态的环境因素对泥石流发育的影响。文章还对影响泥石流发育的所有环境因素进行了分类和评价,将9类因素归结为影响泥石流发育的物源因素和影响泥石流运动状态的因素2大类,建立了泥石流发育影响因素分类体系,并评价、排序了它们在泥石流孕育过程中的重要性。最后,总结出研究区最易发生泥石流的环境因素组合。This paper introduces a quantitative study on the environmental factors affecting debris-flow development using Landsat-TM image. We take 339 debris-flow valleies for a 18000km^2 area in northwest Hebei as the studied objects. After analyzing in detail all the environmental factors having influenced over debris-flow development, we choose vegetation cover, rock type, valley bed gradient, the plane shape of valley and landform feature which can be interpreted from Landsat-TM image, and break them down into a few degrees using Landsat-TM image, to make quantitative study. The method for the study is to take a great deal of samples for statistics, getting the relations between the five kinds of environmental factors at different states and the development of debris-flow. So it shows quantitatively that these environmental factors at different development states affecting the development of debris-flow. Besides, in the paper, all the environmental factors having influence over the development of debris-flow are classified and evaluated. Nine kinds of the environmental factors are grouped into two main types. One group are factors influence material source,the other group are factors influencing the state of debris-flow movement. We consider the two main types as equal in the influence to the development of debris-flow. But 9 kinds of environmental factors are of some difference on that. So, they are arranged in order according their importance to the growth of debris-flow. Finally, the combination of a few environmental factors resulting in debris-flow most possibly is worked out.

关 键 词：Iamdsat—TM 遥感图像 泥石流 环境因素 定量研究 分类 评价 

分 类 号：P642.2[天文地球—工程地质学]