Impacts of Urbanization on Surface Runoff and Flooding Using Spatial Hydrological Models and GIS

Nazeeh Ibrahim Al Manasyeh

Abstract


This study aims at applying the GIS methodology to urban growth and hydrological modeling. It presents how to apply GIS in environmental modeling, along with the role of GIS in dealing with hydrological data and extracting information. Impacts of urban growth on surface runoff, and the rainfall–runoff relationship are examined by linking the two modeling results with spatial analysis techniques. This methodology is employed to evaluate the relationship between urban growth and water resources management including flood management into the Lane Cove area, Sydney-Australia.
These applications have been presented through two methodologies. The first is the GIS applications in the theory of surface runoff, and the other is the (SCN-CN) method. Relevant maps are also included. The results demonstrate that highly urbanized areas are more prone to flooding. Urbanization reduces potential maximum storage for soil and thus increases runoff coefficient values.

Keywords


GIS, Hydrological Modeling, Urbanization, Surface Runoff

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