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Mohammed, A. A.
National Centre for Hydropower Research and Development, University of Ilorin, Ilorin, Nigeria
Salami, A. W.
Department of Water Resources and Environmental Engineering, University of Ilorin, Ilorin, Nigeria
Sule, B. F.
Department of Water Resources and Environmental Engineering, University of Ilorin, Ilorin, Nigeria
Adikwu, J. P.
Land and Water Engineering Department, National Center for Agricultural Mechanization, Idofian, Kwara State, Nigeria
ABSTRACT
The aim of this study is to analyse the trend exhibited by
meteorological parameters such as evaporation, precipitation and temperature
for Osogbo, Nigeria. The data used for the analysis was for a duration
of fifty-one years (1960 to 2010). The data were subjected to statistical
analysis like measures of dispersion and central tendency. Non-parametric
Man Kendall test was used to detect presence or absence of monotonic trends,
standardised anomaly indices (SAIs) was used to depict trends associated with
the parameters and simple linear regression model was used to develop linear
relationship for the variables with time. It was observed from the results of
the analyses that trends occur in all the meteorological parameters. The
results of SAIs and Mann Kendall analyses reveal that precipitation,
evaporation and temperature have positive trend. Also the maximum temperature
demonstrates a significantly increasing trend but trend exhibited by other
parameters are not significant. Hence, it can be concluded that the maximum
temperature has tendency to increase in the study area in future.
Keywords: Man Kendall, Trend, Osogbo and Standardised anomaly index
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Published
Tuesday, June 26, 2018
Issue
Vol. 4 No. 1, JUNE 2018
Article Section
GENERAL
The contents of the articles are the sole opinion of the author(s) and not of UJET.
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