Journal
ENVIRONMENTAL EARTH SCIENCES
Volume 59, Issue 2, Pages 465-472Publisher
SPRINGER
DOI: 10.1007/s12665-009-0045-1
Keywords
Catchment discretization; DEM; GIS; Rainfall-runoff model; SWMM
Funding
- University of Macau
- Official Provisional Municipal Council of Macau
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Rainfall-runoff models play an important role in urban water resource management. The storm water management model (SWMM) developed by the US Environmental Protection Agency (EPA) is a widely used dynamic rainfall-runoff model for analyzing quantity and quality problems associated with urban drainage systems. In an ideal situation, the SWMM model would be designed and analyzed using a collection of catchment modeling systems. Traditionally, catchment discretization for rainfall-runoff modeling is performed manually on watershed maps, a time-consuming job with less-than-accurate results. An alternative approach to catchment discretization based on geographic information system (GIS) is proposed in this paper. The automatic discretization approach was successfully applied to rainfall-runoff modeling in Macau using a SWMM model. The results showed that the proposed approach outperformed the conventional catchment-discretization method in terms of producing meaningful parameters and avoiding most of the tedious preliminary tasks.
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