摘要
利用云南省蒋家沟1995—1997年43场泥石流数据和降水资料,详细分析了泥石流暴发的前期降水与始发日降水的权重关系。研究发现,前期降水和始发日降水是泥石流启动的主要因素。依据它们之间不同的权重关系,将蒋家沟泥石流分为前期降水型、强降水型和特殊型3种形式。不同权重降水下的泥石流输沙与降水量之间均呈现出较好的相关性。从泥石流出现的规模和数量看,前期降水型泥石流是该地区的主要类型。
Based on the data observed for debris flow and precipitation from 1995 to 1997 in Jiangjia gully, Yunnan Province, different weighted relations between antecedent rainfall and process precipitation are analyzed. The analyses indicate that antecedent rainfall and process precipitation are the critical factors to trigger debris flow. Debris flow may be divided into three types based on different weighted relations between ante- cedent rainfall and process precipitation. Moreover, the relation between sediment yield of debris flow and rainfall under different rainfall conditions is discussed and a sound result is obtained.
出处
《水土保持通报》
CSCD
北大核心
2008年第2期71-75,共5页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目“泥石流土体启动的应力应变特征及其降雨警戒基准值的研究”(40671026)
关键词
泥石流
前期降水与始发日降水
权重关系
输沙量
debris flow
antecedent rainfall and process precipitation
weighted relation
sediment yield
