Moreover, the study aims to produce a deeper comprehension of numerical modeling and urban flooding.įloods and flood modeling are a hot topic in the research field of hydrology and hydrological modeling. 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.
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. Application of different building representation techniques in HEC-RAS 2-D for urban flood modeling using the Toce River experimental case.
Cite this article Mustafa A, Szydłowski M. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdańsk, Poland DOI 10.7717/peerj.11667 Published Accepted Received Academic Editor Monika Mortimer Subject Areas Coupled Natural and Human Systems, Natural Resource Management, Environmental Impacts Keywords Urban floods, Urban topography, HEC-RAS 2-D, Building representations, Numerical simulation, Hydrodynamic modeling Copyright © 2021 Mustafa and Szydłowski Licence This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed.