Environmental Risk Determination of Flood in Porsuk River Basin Via One-Dimensional Modelling

Abstract

Floods, which are frequently occurring natural disasters, may interrupt the social and economic activities, and cause serious environmental and health problems in the region under effect. Floods may cause environmental problems such as soil loss, pollution of fresh water resources and epidemic diseases transported by floodwater. In order to prevent these adverse effects, flood risk maps, flood prevention and sustainable flood management plans must be established at the settlements which are vulnerable to floods. In this study the flood frequency analysis of Porsuk River basin located between the Porsuk Dam (which is the only source of domestic water of the city) and Eskisehir city center was conducted. The return period and probability distribution of flood magnitude were identified by flood frequency analysis. The effects of floods on the region located between the Porsuk Dam and Eskisehir city center were examined, the probable maximum flood for 25, 50, 100, and 500 years of flood return periods were determined by Log Pearson III method using the maximum flow data of years 1963-2009. MIKE 11 was presented in this study as one-dimensional flood model, which was conducted to determine the flood risk with efficient, easy and quick decision making approaches in Turkey.