辽宁省东部山区泥石流形成因素的探讨

AN APPROACH ON THE ELEMENTS INFLUENCING THE FORMATION OF DEBRIS ELOW IN EAST LIAONING MOUNTAIN AREA

从辽宁省东部山区泥石流暴发的特点看，暴雨只是泥石流发生的一个激发因素。泥石流活动区分布于地壳快速上升，地震活动频繁的地带，泥石流活动的高潮与该区地震活动期基本一致，由此说明辽宁东部山区泥石流其孕育、发展和活动主要受内力地质作用所控制．

The fault structures with different graduations ranges and directions are over normaldevelopment,According to the lithologic characters,it is mostly an exposed area with grainte andmixed grainte, Therefore,the neotectonic movement is very strong,as well as the crustal uplift isobsviously and quickly,and earthquake would occur frequently, On the history,the debris flow inEast Liaoning Mountain Area has cyctical variation , which is in climax on relatively slable,Thiscyctical variation is in harmony with the earthquake activity in the area,that is to say,the climaxof the earthquake activity is about 100 years,but the debris flow will enter into the dimax periodjust after the climax period of earthquake activity.