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Journal of Environmental Hydrology
ISSN 1058-3912 |
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Electronic Journal of the International Association for
Environmental Hydrology
JEH Volume 14 (2006), Paper 12 Posted September 13, 2006 RETURN PERIOD ANALYSIS AS A TOOL FOR URBAN FLOOD PREDICTION IN THE NIGER DELTA: A CASE STUDY OF PORT HARCOURT CITY, NIGERIA
A.E. Gobo ABSTRACT The study examined return period analysis as a tool for flood prediction in urban areas. This technique enables us to know when an event is expected to occur, be equaled, or be exceeded. When floods occur, the effects are always very devastating, sometimes resulting in destruction of homes, villages, human life and property. Urban floods in most cases result from unplanned, uncoordinated urbanization projects, poor sanitary habits of dumping of refuse, and poorly maintained and insufficient drainage. These are well highlighted in this study. Results indicate that for thirty years of data, the return period is 10.3 years for a maximum 1-month rainfall of 804 mm with a maximum 1-year rainfall of 2,544 mm for same return period. The study recommends routing through specific drainages in flood prone areas of Port Harcourt to mitigate the impacts of flooding. Reference: Gobo, A.E., and T.K.S Abam. 2006. Return period analysis as a tool for urban flood prediction in the Niger Delta: A case study of Port Harcourt City, Nigeria. Journal of Environmental Hydrology, Vol. 14, Paper 12. CONTACT: A.E. Gobo Institute of Geosciences and Space Technology Rivers State University of Science and Technology Port Harcourt, Nigeria E-mail: Email: groundscan@yahoo.com |
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