|Influence of DEM resolution on surface flow network for pluvial urban flooding and simulations of in|
This paper presents the developments towards the next generation of overland flow modellingfor analysis of urban pluvial flooding. The input data for the surface drainage network aregenerated automatically using detailed analysis of Digital Elevation Model (DEM).Developed tools for input data generation allows the user to define the surface flow networkconsisting of pathways and temporary ponds (flooded areas) and to link it with undergroundnetwork through inlets. In this paper the emphasis is placed on detailed sensitivity analysis ofponds and the preferential pathways creation. Four DEM data sets for the same catchmentwere considered in order to compare the results obtained using the methodology. The DEMsused were generated from different acquisition techniques; hence have different resolutionsand accuracy. The results obtained by the applied methodology show that they can representthe surface flow network reliably but differences need to be analysed separately. Comparingthe results obtained by different data sets, the quality of the surface network generated ishighly dependent on the quality and resolution of the terrain data sets. Relevant conclusionsare drawn.
J.P. Leitao, S. Boonya-aroonnet, D. Prodanovi and C. Maksimovi
|แก้ไขล่าสุด ใน วันพฤหัสบดีที่ 16 มิถุนายน 2011 เวลา 17:15 น.|