Analysis of rainfall and temperature trend and variability of the Tordzie Watershed

  • Mexoese Nyatuame Ho Technical University
  • Sampson Kwaku Agodzo Kwame Nkrumah University of Science and Technology, Department of Agricultural and Biosystems Engineering
  • Leonard Kofitse Amekudzi Kwame Nkrumah University of Science and Technology

Abstract

Climate change is universally occurring but probable fluctuations are not anticipated to be uniform worldwide; rather, there may be local differences. Thus, there is a need to investigate the variations at the local and watershed levels to comprehend the magnitude of the change. This study was conducted to determine the trend of rainfall and assess its dependability. In this study, mean monthly and annual rainfall was analysed to determine the variability in magnitude over the period 1984-2014 at different stations. The non-parametric trend detector, Mann-Kendall test (MK) and trend magnitude detector, Sen’s Slope (SS) were used to reveal the trend and magnitude of rainfall and temperature, respectively. The largest increasing slope of significant annual precipitation occurred in November with a magnitude of 1.68 mm/y in Tordzinu. October recorded the most reliable rainfall at Kpetoe with CV of 0.3. The highest maximum monthly rainfall occurred in May, 2005 at Tordzinu with magnitude of 522.2mm for the period under review. The minimum and maximum temperature increased by 0.20C and 0.80C respectively at Kpetoe and also 0.20C and 0.50C at Tordzinu per decade respectively.

Author Biographies

Sampson Kwaku Agodzo, Kwame Nkrumah University of Science and Technology, Department of Agricultural and Biosystems Engineering

 Depart of Agricultural and Biosystems Engineering

Professor

Leonard Kofitse Amekudzi, Kwame Nkrumah University of Science and Technology

Department of Physics

Professor

Published
2022-05-31
How to Cite
Nyatuame, M., Agodzo, S., & Amekudzi, L. (2022). Analysis of rainfall and temperature trend and variability of the Tordzie Watershed. Ghana Journal of Science, Technology and Development, 8(1), 1-17. https://doi.org/10.47881/271.967x