关键词: 泥石流发育阶段划分; 面积-高程积分值; 牛孔河流域泥石流; 牛孔-黄草岭断层;

Abstract: There is significant difference between the development stage of debris flow gullies on the south bank and north bank of Niukong River in Luchun County, Yunnan Province, China.In order to study the reason of the difference, this paper discusses the criteria for dividing the development stage of debris flows based on Davis′ theory of geomorphic erosion, and divides the development stage of debris flows into development stage, exuberant stage, declining stage and rest stage.This paper quantitatively analyzes the development stage of 8 debris flow gullies in Niukong River Basin using the area-elevation integral method.The results show that: the N1～N3 debris flow gullies on the north bank of Niukong River are in the declining stage, and the N4～N8 debris flow gullies on the south bank are in the exuberant stage.The analysis shows that the fault is the main reason for the development stage difference of debris flows in Niukong River Basin.The strike of Niukong-Huangcaoling fault is basically parallel to the extension direction of Niukong River.At present, the debris flow gullies in the declining stage are located in the upper wall of the fault, and those in the exuberant stage are located in the lower wall of the fault.

Key words: division of development stage of debris flow; area-elevation integral value; debris flow in Niukong River Basin; Niukong-Huangcaoling fault;