climate Article Multiyear Rainfall and Temperature Trends in the Volta River Basin and their Potential Impact on Hydropower Generation in Ghana Amos T. Kabo-Bah 1,2,*, Chuks. J. Diji 2, Kaku Nokoe 3, Yacob Mulugetta 4, Daniel Obeng-Ofori 5 and Komlavi Akpoti 6 1 Department of Energy and Environmental Engineering, University of Energy and Natural Resources, P. O. Box 214, Sunyani, Ghana 2 Department of Mechanical Engineering, University of Ibadan, Ibadan, Nigeria;
[email protected] 3 School of Graduate Studies, University of Energy and Natural Resources, P. O. Box 214, Sunyani, Ghana;
[email protected] 4 Department of Science, Technology, Engineering & Public Policy (STEaPP), University College London, London WC1E 6BT, UK;
[email protected] 5 Office of the Pro-Vice Chancellor, University of Energy and Natural Resources, P. O. Box 214, Sunyani, Ghana;
[email protected] 6 Earth Observation Research and Innovation Centre, University of Energy and Natural Resources, P. O. Box 214, Sunyani, Ghana;
[email protected] * Correspondence:
[email protected] ; Tel.: +233-543-859-721 Academic Editors: Daniele Bocchiola, Claudio Cassardo and Guglielmina Diolaiuti Received: 2 May 2016; Accepted: 19 September 2016; Published: 12 October 2016 Abstract: The effects of temperature and rainfall changes on hydropower generation in Ghana from 1960–2011 were examined to understand country-wide trends of climate variability. Moreover, the discharge and the water level trends for the Akosombo reservoir from 1965–2014 were examined using the Mann-Kendall test statistic to assess localised changes. The annual temperature trend was positive while rainfall showed both negative and positive trends in different parts of the country.