关键词: 菲律宾2．17泥石流成因, 三峡库区, 泥石流灾害, 对比分析

Abstract: Catastrophic debris flow occurring in Philippines on February 17th，2006 is the inevitable result from coupling and changing of factors such as materials sourses ，landform and geomorphology，precipitations and earthquake．It is the mocha- nism forthe debris flow to develop that landslide breaks up under action of strong precipitation and weak earthquake，and the reason for the calamity is due to many buildings and residents living in the area of debris flow while there is not any system to foresee and forecast debris flow．In this paper．authors compare basic conditions to trigger debris flow in the area of the Three Gorges reservoir with that in region of Philippines happened on February 17 ，2006，including the materials sources，outline of valley．meteorological conditions and earthquake．Then some conclusions are obtained：in area of the Three Gorges reser． voir，classifications and reserves of materials have more quantity；strength under action of water are easier decreased；quantity of debris flow valleys is more；bad meteorological conditions are more obvious；man-made actions are more widely and the trend to cause calamity is more inevitable．In other words，there are enough conditions to triger catastrophic debris flow in area of the Three Gorges reservoir．Further，some primitative ideals to study and control the debris flow in area of the Three Go rgeservoir are approached ．

Key words: formation of debris flow occurring in Philippines on Februaryl7th , 2006；the area of the Three Gorge reservoir；debris flow disaster；comparative analysis