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Comparison of Several Procedures for Modeling Floodplain Flow in Urban Areas

出版	Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins, Canals i Ports de Barcelona. Departament d'Enginyeria Hidràulica, Marítima i Ambiental, 2012 (Enginyeria de Camins, Canals i Ports), 2012
URL	http://books.google.com.hk/books?id=D7cXywEACAAJ&hl=&source=gbs_api

註釋[ANGLÈS] The simulation of floods in urban areas is fundamental to evaluate the risks or to draw emergency plans. However, it is a difficult task because of the complexity of the flow through such a media, and because of the scale of the problem. (...) There are different approaches to the modeling of urban floods in 2D more or less simplified: the resolved, the increased roughness and the porosity approach. (...) the three modeling approaches are applied to a case study situated in Encamp (Andorra) and compared, following the work of Petaccia et al (2010) and Yu et al (2011). Another sensitivity test is carried out due to the scarce calibration data and to verify the results of the other one. The overall conclusion is that the spacial resolution has a greater effect than any calibration parameter, therefore the results of both simplified approaches are far from the resolved approach in terms of water surface elevation. Nevertheless, the increased roughness approach seems to adjust better the water levels and it's easy to adjust. On the contrary, the porosity pre-processing and calibration is more complex due to the higher number of parameters and its uncertain physical meaning in a real case study. The last conclusion is that the porosity model should be improved.