昆明东川城区后山泥石流特征及成因分析

Characteristics and formation of debris flows in Dongchuan Town,Kunming City

东川区是云南省也是我国泥石流暴发最强烈的地区之一。其突出特点是沟谷数量多、密度大、活动频繁、破坏损失严重、防治困难，严重威胁东川城区人民生命财产安全。论文详细分析了城区后山5条泥石流沟的暴发成因和特征。其泥石流以稀性泥石流为主，重度1．5—2．0kN／m^3之间。该区泥石流之所以如此发育，主要是地质地理环境起控制作用。东川区地质构造发育、地震频繁、山体失稳、地形高差悬殊和雨量集中且暴雨强度大等，是导致本区泥石流频繁而猛烈的根本原因。而人类不合理的经济活动则对本区泥石流的发生发展起着重要的加剧、恶化作用。论文的分析不仅对决策机构制定防治措施具有借鉴意义，且对东川城区后山“五沟”泥石流的修复治理具有重要意义。

Dongchuan is one of the most serious areas of debris flows not only in Yunnan province but in China. Debris flows in this city are mainly thin debris flows, and the bulk density is between 1.5 - 2.0 kN/m^3 . The development of geological structure, frequent earthquake, slope instability and heavy rainfall are the fundamental causes for the frequent and strong debris flows in this area. On the other hand, unsustainable economic activity of human is also strengthening and worsening the occurrence of debris flow. The analysis of this article will have constructive significance for the decision-making administration.