A Study on the Variability of Rainfall in Ibi, Taraba State Nigeria

Abstract

Rainfall is a highly variable atmospheric parameter, taking on a spatio-temporal dimension. Ibi is located in the Sudan-Savannah vegetation zone of Nigeria and has over the past decades experienced variability in rainfall. For this study, rainfall data for 22 years was analyzed, the Time Series Plot gave a decreasing trend over the 22 years period, while the Standardized Anomaly Index showed drier years from the mid to the end of the period, the Spectrum Analysis gave a periodicity of 3 years cyclical variation, the normal distribution curve has a mean rainfall amount of 1061mm for the 22 years period, running analysis for the July to September rainfall equally showed much variability in the Ibi rainfall regimes.