©GIS Development GIS INTEGRATION FOR MICROZONATION HAZARD MAPPING-A CASE STUDY OF

GIS will provide an effective solution for integrating different layers of information thus providing a useful input for city planning and in particular input to earthquake resistant design of structures in an area. Seismic hazard and microzonation of cities enable to characterize the potential seismic areas that need to be taken into account when designing new structures or retrofitting the existing ones In this paper, the details of seismic hazard analysis and preparation of microzonation maps for Bangalore using Geographical Information System (GIS) have been discussed and presented. Seismic hazard is the study of expected earthquake ground motions at any point on the earth. Microzonation is the process of sub division of region in to number of zones based on the earthquake effects in the local scale. Seismic microzonation is the process of estimating response of soil layers under earthquake excitation and thus the variation of ground motion characteristic on the ground surface. For the seismic microzonation, geotechnical site characterization needs to be assessed at local scale (micro level) along with geology, seismological details, which are further used to assess of the site response and liquefaction susceptibility of the sites. GIS is used as a tool to represent the all possible earthquake hazard parameters in the form of geographical maps, which is most useful for government agencies, non-governmental organizations, business communities and public for planning infrastructures developments, emergency preparedness and management. The microzonation, thus, achieved is envisaged as a tool for GIS landuse planning, hazard management, structural engineering, and insurance purposes