| Abstrakt: |
This study presents the preparation of floodwater depth, the velocity of the flood, and water surface elevation profile with the application of unsteady flow 2D Hydrodynamic models and GIS. Flood frequency analysis is used for the prediction of peak flow. The water depth up to 1m inundated a large amount of area of 52.5134 km², 52.4756 km² and 52.4403 km² for a 10-, 100-, and 1000 years return period respectively. Much amount of inundated area covered with a velocity value up to 0.15 m/s in all flood events, which is 53.207, 52.656, and 52.064km² for flood events of 10, 100, and 1000-year respectively. The highest water surface elevation in the 10, 100, and 1000-year flood events was observed between 1785 and 1787m with an inundated area of 58.806, 58.843, and 58.827km² respectively. Finally, the result of this study is useful for early warnings, municipal planning purposes, emergency action plans, flood insurance rates, and ecological studies in the research area. [ABSTRACT FROM AUTHOR] |
