湖南茶陵滑坡空间预警的降雨临界值初步分析

湖南省茶陵县位于湖南东部,滑坡是县内分布最广、危害最大的地质灾害类型,且有土质、浅层、规模小、降雨诱发的特点。本文以茶陵县已知发灾时间的滑坡作为样本,建立滑坡灾害的发生与降雨量的统计关系,确定导致茶陵县不同区域滑坡发生的临界降雨量,最后利用地质-气象耦合的预报模式得出茶陵县滑坡灾害气象预警的分级和分区。

Preliminary study on the critical rainfall for landslide space early warning in chaling county of Hunan province

Chaling county is located in the eastern of Hunan province,landslide is the most widely distributed and the most harmful type of geological disasters,moreover there is soil,shallow,small-scale,rainfall-induced features. This paper make the landslide which is known the specific time as sample to establish the statistical relationship between occurrence of landslides and rainfall,and determine the critical rainfall which causes the landslides in different regions of Chaling county,finally use the forecasting model of geological and meteorological coupling to get meteorological early-warning grading and partitions of landslide in Chaling county.