ARCHIVES
VOL. 6, ISSUE 4 (2024)
Statistical analysis of rainfall data: A case study of eastern region in Burkina Faso
Authors
Tog-Noma Patricia Emma Bontogho, Michelline Marie Regina Kansole, Mamounata Kabore, Gaba Olayemi Ursula Charlène
Abstract
Accurate analysis of rainfall characteristics is essential for water resources management practices mainly in water scarce countries. In this study, analysis of historical rainfall time series at four synoptic stations in Burkina Faso was carried out in order to evaluate the statistical characteristics of rainfall data recorded from 1980 to 2021. In each station, skewness and kurtosis were applied to test the annual rainfall distribution. Similarly, the standard normal homogeneity test (SNHT) and the probability of exceedance were computed. The Mann-Kendall test and Sen's slope estimator were then used to detect trends and estimate their magnitude in the time series data. As a result, a negative skewness is observed in Diapaga station indicating that the rainfall data is skewed to the left. Conversely, the station of Fada N’Gourma, Mahadaga and Pama are showing a positive skewness. The kurtosis is positive across all station indicating a peaked distribution. A maximum rainfall magnitude of 1000mm/year in Diapaga and Fada N’Gourma is exceeded with a 25% probability of occurrence. A maximum rainfall magnitude of 730mm /year and 750 mm/year is exceeded with a 87% probability of occurrence respectively in Mahadaga and Pama. In overall, an occurrence of rainfall more than 1000mm is low while the occurrence of rainfall around 700mm is high. Man Kendall test results in Diapaga (2.0754), Mahadaga (0.32614) and Pama (0.69683) exhibit a significant positive trend, while Fada N'Gourma (-0.50403) shows a non-significant decreasing trend.
Download
Pages:56-61
How to cite this article:
Tog-Noma Patricia Emma Bontogho, Michelline Marie Regina Kansole, Mamounata Kabore, Gaba Olayemi Ursula Charlène "Statistical analysis of rainfall data: A case study of eastern region in Burkina Faso". International Journal of Ecology and Environmental Sciences, Vol 6, Issue 4, 2024, Pages 56-61
Download Author Certificate
Please enter the email address corresponding to this article submission to download your certificate.