Journal of Engineering and Applied Sciences

Year: 2012
Volume: 7
Issue: 1
Page No. 79 - 85

Rainfall Trends in Uyo-Akwa Ibom State and its Implication on Urban Flooding

Authors : C.E. Udosen

Abstract: Available records of daily rainfall data recorded for a period of 34 years (1977-2010) from the Agro-meteorological station of the University of Uyo was subjected to rigorous statistical analysis such as measures of central tendency and variability, time series analysis and Spearman rank order statistics. Data on extreme daily rainfall, water balance and flood occurrences were collected for analysis. The annual rainfall was analysed for variability using standardized rainfall anomaly index while recurrence intervals were analysed using Gumbell Extreme Probability Theory. The results of the analysis indicate annual rainfall ranges from 1599.5 mm in 1983 to 3855.5 mm in 1977 with a mean of 2466.6 mm, concentration of rainfall in the months of April-October with mostly high intensity prolonged rainstorm. The results also show a remarkable continuous downward trend in annual rainfall amounts that the period between 1977 and 1979 witnessed the highest frequencies of extreme rainfall events and flood frequencies that major floods were associated with high recurrence intervals and that the seasonality of flooding in Uyo occurs between April and October. This study provides a database that could be employed in flood control in a data poor country such as Nigeria.

How to cite this article:

C.E. Udosen , 2012. Rainfall Trends in Uyo-Akwa Ibom State and its Implication on Urban Flooding. Journal of Engineering and Applied Sciences, 7: 79-85.

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