基于GIS的滑坡临界降雨指标的研究  

Research on the critical precipitation index of landslide based on GIS

作　　者：张玲[1] 黄敬峰[1] 王深法[2] 陈和平[2] 胡先松 

机构地区：[1]浙江大学遥感与信息技术应用研究所,浙江杭州310029 [2]浙江大学资源科学系,浙江杭州310029 [3]庆元县矿产办公室,浙江丽水323800

出　　处：《浙江大学学报（农业与生命科学版）》2003年第5期493-498,共6页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：浙江省"九五"重点科研资助项目(001103213).

摘　　要：利用滑坡灾害普查资料和气象资料,结合地理信息系统(GIS)和降雨推算模型进行空间分析,对庆元县滑坡与降雨作相关研究后发现:降雨具有诱导和直接触发滑坡的综合作用效果;庆元县滑坡的时空分布,受降雨地区和降雨时间的控制,并与一定的地质条件及人类活动有关;滑坡剧烈活动时间与降雨时间及暴雨、大暴雨频次吻合或略滞后,庆元县滑坡的起动降雨量为:日降雨量≥50 mm或滑坡前10 d累积降雨量≥100 mm.In this paper, based on the general survey data of landslide and meteorology data and with the aid of GIS technology and precipitation simulation model, the correlation between landslide and rainfall in Qingyuan County of Zhejiang Province was studied. It is shown that rainfall is one of the most important external factors in occurrence of landslide. The temporal and spatial distribution of landslide in Qingyuan is affected by that of rainfall and related to geological conditions and human impact. The occurrence time of landslide accords with or lags behind that of rainfall and rainstorm. The threshold value of rainfall that triggers landslide is 50 mm rainfall in one day or 100mm accumulative rainfall in 10 days.

关 键 词：GIS 地理信息系统 滑坡 临界降雨指标 时空分布特征 庆元县 

分 类 号：P642.22[天文地球—工程地质学]