Hurricane induced flooding is a recurring phenomenon causing severe damages to lives and properties in southern coastal states. The magnitude of rainfall observed during Harvey Hurricane in August 2017 was all time maximum for some of the regions in Houston, TX. This research focuses on modeling different recurrence frequency flows in a selected river reach along with the Harvey flooding condition. The statistical part involves the flood frequency analysis using Generalized Extreme Value distribution. The flood plain analysis is performed by developing a hydraulic model using Hydraulic Engineering Center’s River Analysis System and Esri ArcMap software. Historical flow data and terrain geometric data are extracted from United States Geological Survey. A river reach of Buffalo Bayou is selected and analyzed for several flow scenarios and flood inundation map of the affected region is developed. The model is calibrated and validated for river stage by adjusting Manning’s roughness coefficient. The evaluation of each flood stage and comparison with the Harvey flooding stage is expected to provide valuable information for floodplain management riverside development, and for future flood assessment plans in the adjoining areas.
Narayan Nyaupane– Graduate Student, Southern Illinois University Carbondale, Carbondale, Illinois
Southern Illinois University Carbondale
I am Narayan Nyaupane, a graduate research assistant at Southern Illinois University Carbondale. I have completed my undergraduate from Pulchowk Campus, Tribhuvan University, Nepal on 2007. Since then I was involved as consultant for different small hydropower projects. Before coming to SIUC on 2016 I was working as senior site engineer at Rasuwagadhi Hydropower Project, 111MW. My research area of interest is himalayan hydrology.