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Scientific Research
RAINFALL PATTERN IN IBA OKU RIVER BASIN, AKWA IBOM STATE AND ITS IMPLICATION ON STREAM FLOW REGIMES
C.E. Udosen
Available records of daily rainfall data at Uyo recorded for a period of 34 year (19772010) was subjected to rigorous statistical analysis such as measures of central tendency and variability, time series analysis, Spearman’s Rank Order statistics etc. The results indicate annual rainfall ranges from 1599.5mm in 1983 to 3855.5mm in 1977, (recorded between 1977 and 2010) with a mean of 2466.6mm: unimodal monthly distribution (with no pronounced August break)): concentration of rainfall in the months of April October, mostly high intensity prolonged rainstorms: downward trend in annual rainfall in a cyclical pattern and the regression equation Y = 8.159x + 563. Field survey/measurement, focus group discussion and indepth interview confirm the incidence of dried streams, particularly order1 streams which drains the University of Uyo town campus. Other streams have shrunk to mere trickles of water in their channels. This study justifies the need for flood/erosion control.
10 Pages
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