How to cite: Ziya Kaya, Y., Üneş, F. Demirci, M. (2022) Flood Modeling Based on The Precipitation Data by
Using Hec-Ras Software Version (5.0.7). 2022 ”Air and Water – Components of the Environment” Conference
Proceedings, Cluj-Napoca, Romania, p. 47-56, DOI: 10.24193/AWC2022_05.
FLOOD MODELING BASED ON THE PRECIPITATION DATA BY
USING HEC-RAS SOFTWARE VERSION (5.0.7)
Yunus ZİYA KAYA, Fatih ÜNEŞ, Mustafa DEMİRCİ
ABSTRACT. – Floods are one of the most destroyable disasters that affect human life directly. It is important to model floods for the determination of the vulnerable areas, and planning of the dangerous zones. For this purpose, HEC-RAS software is in use to create complex flood models. In general, for the modeling of a flood by using any software, an accurate topography of the area, boundary conditions, Manning coefficients, and the flow data are essential. However, it is not always possible to have the flow rate of all streams located in the study area. Because of the mentioned reason, in this study authors preferred to directly use precipitation data for modeling the flood. A model was created by using SRTM satellite data for the digital elevation model. A two-dimensional geometry was created, and the precipitation data was added to the model. The main output of the performed model showed that using precipitation data directly on a flood model is not fully representative of the extent of flooding. According to the model result, the flood is spread over a wider area than it actually was.
Keywords: Flood Modeling, HEC-RAS 2D, Precipitation, Digital Elevation Model
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