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Abstract of the Article

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Application of hydraulic model and GIS in floodplain management

Authors:
[ Abghari ] - Ph.D. Student, Watershed Management, Faculty of Natural Resources, University of Tehran
[ Mohseni Saravi ] - Associate Professor, Faculty of Natural Resources, University of Tehran
[ Mahdavi ] - Professor, Faculty of Natural Resources, University of Tehran
[ Ahmadi ] - Professor, Faculty of Natural Resources, University of Tehran

Abstract:

Flood is the natural hazards that always affect human living since immemorial time throughout history; it can not be controlled, but with management of floodplain we can reduce flood damages. Jajrood River in Tehran province because of degradated watershed condition is susceptible stream to flash floods. GIS analysis is a powerful tool in the field of Water Resources Engineering where simulation and modeling are essential to problem solving. In this study using GIS and hydraulic model Hec-RAS, flood hazard mapping in 5, 10, 25, 50, 100, 200 return periods Delineated. Hec-GeoRAS extension that links GIS and Hec-RAS has high capabilities in hydraulic analysis water surface profiles and flood zoning. Using hydraulic analysis of bridge in the reach study, optimum design flood determined by model.

Keywords:

Flood, GIS, Hec-RAS, Hec-GeoRAS, Jajrood, Flood Zoning