The objective of this study is to analyses long-term trends and rainfall breaks in the Bandama River catchment. To achieve this objective, the study used data from nineteen (19) rainfall stations from 1950 - 2020. The methodology adopted was based on the Mann Kendall (classical and modified), Krusal Wallis and Cumulative Deviation statistical tests to detect and analyses significant changes in the rainfall series. The results show that 58% of the stations show a significant downward trend at the 5% risk without taking into account the Hurst effect, while with the Hurst effect only 32% of the stations show significant downward trends at the 5% risk. The breaks detected in this study oscillate around 1970 with a deficit ranging from -6% to 23 %. Furthermore, the Moran Index (MI) revealed a spatial dependence in the rainfall series of the catchment.
Show abstract
Full Text
