“5.12”汶川特大地震重灾区泥石流滑坡气候特征分析

Characteristic Analysis of the Mud-rock Flow and Land Slip in Heavy Disaster Area on May 12th Wenchuan Earthquake in Sichuan Province

本文通过对汶川“5.12”特大地震重灾区1991-2003年的泥石流、滑坡等山地灾害的终初日、时空分布及其与降水的关系的分析,还对这次特大地震造成堰塞湖的滑坡面积进行了统计分析。得出了汶川特大地震重灾区的泥石流、滑坡的时空分布、多发时段与集中发生时段、终初日及其出现地点、泥石流、滑坡与当日雨量与前期降水的关系等特征方面新的认识。指出了“5.12”特大地震造成堰塞湖的滑坡面易发生群发性泥石流、滑坡等山地灾害的严重隐患。从而为抗震救灾和灾后重建工作提供科学依据。

By analyzing the starting and ending time, special coverage and variation, relationship with the rainfall, the mud - rock flow and land slip of severe China Wenchuan Earthquake area from 1991 to 2003 are studied. And the coverage of dammed lake caused by the earthquake is calculated by statistic methods. The new findings of spatial characteristics and variation, excessive happening period of time, concentrating happening period of time, starting and ending time and happening postions and relationship with the rainfall are gotten. The ar- ticle indicate that the land slip of the dammed lake caused by the China Wenchuan Earthquake easily lead to large area happening mud - rock flows. The article will offer scientific means to anti - earthquake and rebuilding in the earthquake area.