Flood Plain Management Integrating GIS and HEC-2.
Little has been done over the years to either automate the more labour intensive activities involved in flood plain mapping and management or to increase the efficiency and accuracy of handling applications for development or modification of hazard land. A logical approach to addressing both of these shortcomings is to integrate a GIS into the flood plain management process. For the water resources professional, a BIS-based flood plain management system would serve two primary functions. Firstly, it would serve as a front end to the modelling process, providing digital data for input into both hydraulic and hydrologic modelling programs. Secondly, it would act as a dynamic output medium for results of the modelling process, converting the output data into flood elevation contours on digital base mapping. For watershed planners, such a system would provide immediate access to current information about potential and/or historical flooding potential and related property-based data through interactive GIS inquiries. This chapter outlines the continuing development of a GIS-based flood plain management system, GISFPM, which interfaces Geo/SQL and the hydraulic modelling package, HEC-2.
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