Relationship of Hydroclimate Variables and Power Generation in Jebba Dam, North Central Nigeria

Abstract

This study aims to determine a relationship between power generation and hydroclimate elements. The Mann-Kendall test, Sen’s slope tests, Pearson’s correlation and linear regression have been used for data analysis. The results of monthly hydroclimate elements showed mixed increasing and decreasing trends. The annual rainfall, maximum and minimum temperature showed an increasing trend, while evaporation showed decreasing trends. The annual inflow and outflow showed significantly increasing trends, while reservoir elevation showed a significant decreasing trend. The annual hydropower generation showed a non-significant increasing trend implying power generation has risen over the years. The Pearson’s correlation results showed a positive relationship between rainfall, hydropower generation while other climate elements showed a weak negative relationship. This relationship implies that climate factors play an insignificant role in power generation at Jebba dam. However, the consistently increased temperature trends in the Jebba dam could indicate climate variability and change. Contrary to other studies, we concluded that climate might not significantly influence hydropower generation at Jebba dam, Nigeria. Although continuing climate studies are encouraged, we recommended that authorities focus more on other factors for optimum power generation.