Enhanced DEM-based flow path delineation methods for urban flood modelling
Abstract
In order to simulate surface runoff and flooding, one-dimensional (1D) overland flow networks can be automatically delineated using digital elevation models (DEM). The resulting network comprises flow paths and terrain depressions/ponds and is essential to reliably model pluvial (surface) flooding events in urban areas by so-called 1D/1D models. Conventional automatic DEM-based flow path delineation methods have problems in producing realistic overland flow paths when detailed high-resolution DEMs of urban areas are used. The aim of this paper is to present the results of research and development of three enhanced DEM-based overland flow path delineation methods; these methods are triggered when the conventional flow path delineation process stops due to a flow obstacle. Two of the methods, the 'bouncing ball and buildings' and 'bouncing ball and A*' methods, are based on the conventional 'bouncing ball' concept; the third proposed method, the 'sliding ball' method, is based on the phy...sical water accumulation concept. These enhanced methods were tested and their results were compared with results obtained using two conventional flow path delineation methods using a semi-synthetic test DEM. The results showed significant improvements in terms of the reliability of the delineated overland flow paths when using these enhanced methods.
Keywords:
digital elevation models / dual-drainage modelling / overland flow path delineation / pluvial flooding / urban waterSource:
Journal of Hydroinformatics, 2013, 15, 2, 568-579Publisher:
- IWA Publishing
DOI: 10.2166/hydro.2012.275
ISSN: 1464-7141
WoS: 000317481900025
Scopus: 2-s2.0-84876405382
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GraFarTY - JOUR AU - Leitao, Joao P. AU - Prodanović, Dušan AU - Boonya-Aroonnet, Surajate AU - Maksimović, Čedo PY - 2013 UR - https://grafar.grf.bg.ac.rs/handle/123456789/510 AB - In order to simulate surface runoff and flooding, one-dimensional (1D) overland flow networks can be automatically delineated using digital elevation models (DEM). The resulting network comprises flow paths and terrain depressions/ponds and is essential to reliably model pluvial (surface) flooding events in urban areas by so-called 1D/1D models. Conventional automatic DEM-based flow path delineation methods have problems in producing realistic overland flow paths when detailed high-resolution DEMs of urban areas are used. The aim of this paper is to present the results of research and development of three enhanced DEM-based overland flow path delineation methods; these methods are triggered when the conventional flow path delineation process stops due to a flow obstacle. Two of the methods, the 'bouncing ball and buildings' and 'bouncing ball and A*' methods, are based on the conventional 'bouncing ball' concept; the third proposed method, the 'sliding ball' method, is based on the physical water accumulation concept. These enhanced methods were tested and their results were compared with results obtained using two conventional flow path delineation methods using a semi-synthetic test DEM. The results showed significant improvements in terms of the reliability of the delineated overland flow paths when using these enhanced methods. PB - IWA Publishing T2 - Journal of Hydroinformatics T1 - Enhanced DEM-based flow path delineation methods for urban flood modelling EP - 579 IS - 2 SP - 568 VL - 15 DO - 10.2166/hydro.2012.275 ER -
@article{ author = "Leitao, Joao P. and Prodanović, Dušan and Boonya-Aroonnet, Surajate and Maksimović, Čedo", year = "2013", abstract = "In order to simulate surface runoff and flooding, one-dimensional (1D) overland flow networks can be automatically delineated using digital elevation models (DEM). The resulting network comprises flow paths and terrain depressions/ponds and is essential to reliably model pluvial (surface) flooding events in urban areas by so-called 1D/1D models. Conventional automatic DEM-based flow path delineation methods have problems in producing realistic overland flow paths when detailed high-resolution DEMs of urban areas are used. The aim of this paper is to present the results of research and development of three enhanced DEM-based overland flow path delineation methods; these methods are triggered when the conventional flow path delineation process stops due to a flow obstacle. Two of the methods, the 'bouncing ball and buildings' and 'bouncing ball and A*' methods, are based on the conventional 'bouncing ball' concept; the third proposed method, the 'sliding ball' method, is based on the physical water accumulation concept. These enhanced methods were tested and their results were compared with results obtained using two conventional flow path delineation methods using a semi-synthetic test DEM. The results showed significant improvements in terms of the reliability of the delineated overland flow paths when using these enhanced methods.", publisher = "IWA Publishing", journal = "Journal of Hydroinformatics", title = "Enhanced DEM-based flow path delineation methods for urban flood modelling", pages = "579-568", number = "2", volume = "15", doi = "10.2166/hydro.2012.275" }
Leitao, J. P., Prodanović, D., Boonya-Aroonnet, S.,& Maksimović, Č.. (2013). Enhanced DEM-based flow path delineation methods for urban flood modelling. in Journal of Hydroinformatics IWA Publishing., 15(2), 568-579. https://doi.org/10.2166/hydro.2012.275
Leitao JP, Prodanović D, Boonya-Aroonnet S, Maksimović Č. Enhanced DEM-based flow path delineation methods for urban flood modelling. in Journal of Hydroinformatics. 2013;15(2):568-579. doi:10.2166/hydro.2012.275 .
Leitao, Joao P., Prodanović, Dušan, Boonya-Aroonnet, Surajate, Maksimović, Čedo, "Enhanced DEM-based flow path delineation methods for urban flood modelling" in Journal of Hydroinformatics, 15, no. 2 (2013):568-579, https://doi.org/10.2166/hydro.2012.275 . .