Geomorphic Assessment of Floods within the Urban Environment of Gbawe-Mallam, Accra.

Abstract

This study examined urban geomorphic conditions that lead to flooding in urban areas of Gbawe and Malam. The main objective of the study was to identify the geomorphic causes of urban flooding. The study used ArcGIS analysis to present the results on land use change. Information on geomorphic and geological characteristics, rainfall pattern and humaninduced activities and their impact on the environment were examined. The result of the research indicated that Ma lam Junction, Abease and Gbawe-Zero Road are areas with the highest vulnerability to flooding. The main input to flooding is rainfall, with the heaviest ranging between 200 and 500mm, and occurring from May-July and August-Octobe1: Relief, geomorphic factors, the urbanization of streams, the drying up of wetlands, the elimination of vegetation cover as well as deficient drainage networks and waste disposal problems are the factors that aggravate flooding in the study area. Some major suggestions were made for effective land use and land management