Title of article
The Changing Rainfall Pattern and Its Implication for Flood Frequency in Makurdi, Northern Nigeria
Author/Authors
OLOGUNORISA, TEMI E. Nasarawa State University - Faculty of Natural and Applied Sciences - Department of Geography, Nigeria , TERSOO, TOR Nasarawa State University - Faculty of Natural and Applied Sciences - Department of Geography, Nigeria
Pages
6
From page
97
To page
102
Abstract
The study deals with analysis of recent changes in the characteristics of extreme rainfall and their implication for flood frequency in Makurdi. Data on extreme daily rainfall, evapotranspiration and flood occurrences were collected for analysis. The annual rainfall was analysed for trends using spearman rank correlation coefficient, annual rainfall variability analysed using standardized rainfall anomaly index while recurrence intervals were analysed using Gumbell Extreme probability theory. The results of the analysis show among other things that there was a remarkable continuous downward trend in annual rainfall amounts; that the period between 1996 and 2001 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 Makurdi occurs between May and October.
Keywords
Changing Rainfall Pattern , Implication , Flood Frequency , Makurdi , Northern Nigeria
Journal title
Journal of Applied Sciences and Environmental Management
Serial Year
2006
Journal title
Journal of Applied Sciences and Environmental Management
Record number
2660331
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