摘要
以陕西省商洛市山阳县红椿沟作为研究对象,采用定量计算和数据归一化处理的方法,提出强度指数的概念,对泥石流风险计算公式进行了拓展,使其可以表征泥石流规模及可能破坏能力。同时对不同降雨条件下的红椿沟泥石流风险进行了评估。研究表明,6h降雨量达到198.4mm及以上时红椿沟发生泥石流的概率为100%。日降雨量r=37.19mm,泥石流风险低;r=64.34mm,泥石流风险中;r=104.94mm,泥石流风险高;r=282.74mm,泥石流风险很高。
Risk assessment of debris flow in the Hongchun Gully of Shanyang County, Shangluo City, Shaanxi Province was studied. Risk assessment of debris flow under different rainfall conditions was carried out by employing the methods of quantitative calculation and data normalization. Intensity index was intro- duced to characterize the scale and potential ability of damage. Results show that the probability of debris flow occurrence is 100% when rainfall reaches 198.4 mm or more in 6 h. The level of debris flow risk is low when daily rainfall （r） reaches 37.19 mm; the level is middle when the r is 64.34mm; the level is high when the r is 104.94 mm; and the level is very high when the r is 282.74 mm.
出处
《水土保持通报》
CSCD
北大核心
2014年第3期145-149,共5页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目"高山峡谷区域暴雨泥石流成灾临界阈值研究"(41302224)
国土资源大调查项目"陕西省重要城镇地质灾害风险评估"(12120113008900)
关键词
泥石流
强度指数
危险性
风险
红椿沟
debris flow
intensity index
hazard
risk
Hongchun Gully
