基于GIS的地震危险性分区评价方法初探  

A Preliminary Study of Seismic Hazard Zoning Evaluation Based on GIS

作　　者：张文朋[1] ZHANG Wen-peng(Earthquake Administration of Tianjin Municipality,Tianjin 300201,China)

机构地区：[1]天津市地震局,天津300201

出　　处：《华北地震科学》2018年第3期52-58,74,共8页North China Earthquake Sciences

基　　金：天津市地震局青年基金项目(121007;20131023);日喀则市活动断层探测与地震危险性评价项目(藏震函[2011]77号)

摘　　要：构建基于GIS的地震危险性分区评价模型,选取地震震级、地震频次、断层长度、断裂时代及断裂性质5个评价要素,依据各要素特征提出相应的定量化处理方法,最后依据各评价要素权重,通过叠加分析获得评价结果;利用这一方法对西藏日喀则地区进行地震危险性分区评价,结果显示:日喀则地区的地震高危险区主要分布于谢通门—拉孜一带及南木林东北,地震危险区主要分布于高危险区外缘、日喀则市区及南木林县的小部分地区,其他地区属次较安全区、较安全区或安全区。其结果可为日喀则地区的国土规划提供参考依据。In this paper,a GIS-based method for seismic risk zoning evaluation is established.The paper selected five evaluation factors,such as earthquake magnitude,seismic frequency,fault length,fracture age and fracture properties,and put forward corresponding quantitative processing methods for these elements according to the characteristics of them,and finally,obtained evaluation results by overlay analysis according to the weight of evaluation elements.In this paper,this method is used to evaluate the seismic hazard zonation in Xigaze region.The results show that the high-risk areas in the Xigaze area are mainly distributed in the Xietongmen-Lazi area and the northeastern part of Nanmulin,the seismic hazard areas are mainly distributed in the outer edge of high-risk areas,Xigaze urban area and a small area of Nanmulin County,other regions are sub-safe,medium-level safe or safe areas,which can provide reference for land planning in Xigaze area.

关 键 词：GIS 日喀则 地震危险性 分区评价 

分 类 号：P315.5[天文地球—地震学]