金沙江干热河谷区地质灾害遥感研究

遥感技术能快速全面、高性价比地获取地表信息，可以从宏观上对区域性地质灾害进行调查，形成对区域性地质灾害分布、规模的定量认识，因此遥感技术已经在国外的地质灾害调查工作中得到了较广泛应用。金沙江德钦段河谷属于典型的干热河谷，遥感技术在该地区的环境地质调查的应用研究，对于西部大开发的工程建设具有很强的实用性。利用3种星载光学遥感影像对这一地区的地质灾害进行了目视解译研究。首先简要介绍了金沙江干热河谷区自然地理、地质和气候环境的特点及其对地质灾害解译产生的影响，其次就本地区的环境地质遥感数据的选择与处理进行了说明，然后配合图片详细分析了研究区主要地质灾害(滑坡、崩塌堆积、泥石流沟和倾倒变形)的解译特征。最后实地考察验证了解译的可行性，并分析总结了存在的不足，提出了利用近红外高光谱提高地质灾害解译研究的设想。

ANALYSIS OF GEOLOGICAL DISASTERS IN DROUGHT-HEAT VALE OF JINSHAJIANG RIVER BY REMOTE SENSING

The remote sensing (RS) suits to acquire information of earth surface quickly,entirely and economically,so it is adopted to identify the geological disasters in a wide region,and gain the quantitative distribution and magnitude.The vale of Jinshajiang River in Deqin County is a typical drought-heat vale. The application of RS in this region will be greatly convenient for the disaster investigation in southwestern China.The authors carried out an investigation of geological disasters based on three kinds of RS images in this paper.First,the features of climate,topography,geology,and their effects on interpretation of geology disasters were discussed.Secondly,the selection of RS data and the processing methods for the data were presented.At last,the authors validated the accuracy of the interpreting results through field investigation,and drew the conclusion that RS is feasible to investigate the geological disaster in this region,and at same time suggested to use near infrared hyper-spectrum image to promote the interpretation of geological disasters.