Arid Lands Flood Evaluation and Mitigation Measures Using HEC-HMS Model and Best Management Practices (BMPs)

<p>This study emphasis on draining and slowing runoff volumes in arid semi-arid lands regions using HEC-HMS model linked with various Best Management Practices (BMPs) alternatives. The proposed methods may help significantly reducing flash flood precipitation improving instream water quality. It provides facilities to increase retention times infiltration rates. Recently, flooding is occurring almost every two-year basis threatening human lives damaging properties. Modern urbanization of the cities has great impacts schemes, it increases peak streamflows reduces time peak. Eventually, major experienced newly developed areas accommodate population, thus surface would substantially. In addition outflows from surrounding high desert which form a significant portion volumes. This modern progressive management scheme that emphasize enhancing soil attenuation by construction absorb water. We formulated five proposals for mitigation derived BMP techniques purposes stormwater management. Rainfall-runoff natural disaster modeling was simulated (Hydrological Modeling Systems). Geographic Information System (GIS) coupled employed this delineate watershed line simulate streams discharges. Results investigating dry dams' option showed reduction both consequently, mitigated spreads longer. Furthermore, downstream calculations prove contributions other events increasing hazards downstream. Outlet bottom size storage capacity are parameters control hazards. Outcomes resources managers decision-makers who need immediate action plans operational responses when floods occur. Discharge outflow rates were assessed CN methods, studied area Systems (GIS). reveals ranges 0.04 0.77 cm/hr. Also, results shows capable simulating based event.</p>