摘要
泥石流是昆明东川城区最主要的地质灾害之一,严重阻碍了城市的社会经济发展。开展东川城区泥石流危险度评价对城市安全与稳定有着重要的意义。文章从地貌学侵蚀旋回理论出发,运用斯特拉勒面积-高程分析法对东川城区后山的3条泥石流沟的危险度进行评价研究。结果表明,深沟和石羊沟的斯特拉勒面积-高程值分别为0.580和0.520,泥石流沟谷正由发育的中年末期向老年期演化,泥石流危险度较低;尼拉姑沟的斯特拉勒面积-高程值为0.452,处于沟谷发育的旺盛时期,泥石流危险度较高,计算结果与当地实际情况有较好的一致性。
Debris flow is one of the main geohazards of Dongchuan City. It has blocked the development of the city for a long time. There is an urgent need of debris flow risk assessment for the city. Based on the geomorphic science, This paper uses Strahler Area-altitude analysis, which is used to evaluate the evolution stage of geomorphy, to analyse debris flow gully of Dongchuan City, in order to find out the relationship between debris flow risk and the evolution of debris flow gully. Three debris flow gullies in Dongchuan were analyzed in this paper. The result shows that the Strahler Area-altitde value of Shengou Gully and Shiyang Gully are 0.580 and 0.520, indicating that they are both in the transitional period between mature stage and old stage. The information entropy of Nilagu Gully is 0.452, suggesting it is in the mature stage. All these results are consistence with local situations.
出处
《中国地质灾害与防治学报》
CSCD
2006年第1期80-82,共3页
The Chinese Journal of Geological Hazard and Control
基金
云南省"十五"攻关资助项目(2001NG44)
