This study aimed at investigating the causes of floods in Numan Town with particular reference to the 2012 floods. Three residential areas： Gangare, Gwadda Mallam and Green Village were selected for the study. Hydrol...This study aimed at investigating the causes of floods in Numan Town with particular reference to the 2012 floods. Three residential areas： Gangare, Gwadda Mallam and Green Village were selected for the study. Hydrological, SRTM （shuttle radar topography mission） digital elevation model, secondary and primary data were utilized. A total of 180 questionnaires were administered to the residents in equal proportion using systematic random sampling. ArcGIS 10.0 and Excel were used for the analysis. The study revealed that the major causes of flood in the area include discharge of water from the Lagdo dam in Cameroon and Kiri dam in Adamawa State. Others include heavy rainfall, topography, and lack of adherence to development control provisions which resulted in construction of residential areas on flood plains. Many of the residents do not have legal title to their plots and this constitutes a very serious constraint to provision of drainages and solid waste disposal services. To ameliorate the devastating effects of floods, the study recommends relocation of residents of flood prone areas, provision of solid waste management services, and construction of more drainages. In addition, the town planning authorities and community leaders should collaborate to ensure that houses are built in flood plains.展开更多
文摘This study aimed at investigating the causes of floods in Numan Town with particular reference to the 2012 floods. Three residential areas： Gangare, Gwadda Mallam and Green Village were selected for the study. Hydrological, SRTM （shuttle radar topography mission） digital elevation model, secondary and primary data were utilized. A total of 180 questionnaires were administered to the residents in equal proportion using systematic random sampling. ArcGIS 10.0 and Excel were used for the analysis. The study revealed that the major causes of flood in the area include discharge of water from the Lagdo dam in Cameroon and Kiri dam in Adamawa State. Others include heavy rainfall, topography, and lack of adherence to development control provisions which resulted in construction of residential areas on flood plains. Many of the residents do not have legal title to their plots and this constitutes a very serious constraint to provision of drainages and solid waste disposal services. To ameliorate the devastating effects of floods, the study recommends relocation of residents of flood prone areas, provision of solid waste management services, and construction of more drainages. In addition, the town planning authorities and community leaders should collaborate to ensure that houses are built in flood plains.
