Flood risk analyses-how detailed do we need to be? Natural Hazards. 2010.Īpel H, Aronica GT, Kreibich H, Thieken AH. Journal of Water Resource and Protection. The effect of the land use/cover changes on the floods of the Madarsu Basin of Northeastern Iran. Modelling flash flood propagation in urban areas using a two-dimensional numerical model. Flood hazard assessment of the urban area of Tabuk City, Kingdom of Saudi Arabia by integrating spatial-based hydrologic and hydrodynamic modeling. Moreover, the study aims to produce a deeper comprehension of numerical modeling and urban flooding.īuilding representations HEC-RAS 2-D Hydrodynamic modeling Numerical simulation Urban floods Urban topography.Ībdelkarim A, Gaber AF, Youssef AM, Pradhan B. Furthermore, this study confirms the importance of the BR technique, which should help researchers in using low-resolution Digital Elevation Models (DEMs) along with open-source programs. As far as the BR technique is concerned, it is well-suited for representing building units in numerical simulations using high Manning coefficients. A sensitivity analysis showed that the proper mesh resolution and model parameter values were obtained.
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A statistical analysis was performed using both the Root Mean Square Error (RMSE) and the Pearson Product-Moment Correlation Coefficient (PPMCC) in order to evaluate the performance of the models. Water depth variation computations using the BR and BB techniques were compared to the laboratory measurements and previous studies in the literature. Two simplified building layouts (aligned and staggered) were examined, where models were prepared for two different building representation techniques: Building Block (BB) and Building Resistance (BR). To this end, eight numerical models based on previous laboratory experiments were prepared to simulate unsteady urban flooding on each side of building units. This paper presents the impact of the choice of building representation techniques and hydrodynamic models on urban flood simulations using HEC-RAS 2-D for the Toce River physical model.