Browsing by Author "Alani, Ruaa Adnan Mohammed Saeed"
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Item COMPARISON OF HYDROLOGIC AND HYDRAULIC FLOOD ROUTING, A CASE STUDY ON THE TIGRIS RIVER(2022-01-25) Alani, Ruaa Adnan Mohammed Saeed; Yılmaz, Meriç; Karim, Ibtisam RaheemThis study deals with channel flood routing problem with two approaches: hydrologic and hydraulic flood routing using software programs HEC-HMS and HEC-RAS, respectively. For the comparison of these methods and software, a case study is carried out on a 158 km long reach on the Tigris River, between Al Shargat and Samarra Dam. With the observed inflow hydrograph of the flood event in the spring of 2019 as an input to both software, the routed outflow hydrograph is predicted. The peak discharge of the observed, HEC-HMS, and HEC-RAS outflows are obtained as 6437.00 m3 /s, 6538.70 m3 /s, and 6600.29 m3 /s, respectively. The translation of the HEC-HMS and HEC-RAS outflow hydrographs are estimated exactly the same as the observed outflow. The differences in the observed and estimated peak discharges are related with the lack of detailed data in HEC-HMS and added levees in HEC-RAS to prevent overflowing to floodplain in the study area. The observed and estimated outflow are found to be in good linear relation considering their coefficient of determination values close to 1.