基于GIS的岷江映秀段泥石流危险性评价

摘要

Watershed topography is the basis for the formation of debris flow. It has a great impact on the development of debris flow. It uses GIS technology to analyze quantitatively the development stage of catchments in MinJiang Yingxiu section, based on the theory of Geomorphic Information Entropy, to evaluate the risk of debris flow in Min Jiang Yingxiu valley. Examples are used to evaluate the accuracy of results. It shows that the evaluation results and actual situation can fit very well.%流域地貌是泥石流形成的基础,对泥石流的发育有较大影响。本文基于地貌信息熵理论,利用GIS技术定量分析岷江映秀段小流域地貌发育阶段,以评价岷江映秀段沟谷发生泥石流的危险性。最后利用泥石流沟的实例数据来验证评价结果的准确性,对比结果表明评价结果与实际情况能较好吻合。