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|Title:||Rainfall trends in the coastal belt of Nigeria (1916-2007)|
|Publisher:||Benin Journal of Social Sciences|
|Series/Report no.:||Vol. 17 (1);73-81|
|Abstract:||This paper examines rainfall trends in the coastal belt of Nigeria using monthly rainfall data for 92 years (1916-2007) collected from the archives of the Nigerian Meteorological Services, Oshodi, Lagos. The rainfall data covered four synoptic stations (Lagos, Warri, Port Harcourt and Calabar). The monthly rainfall data were computed into annual total rainfall for each station while the mean annual rainfall was computed for coastal belt of Nigeria. Standardized rainfall anomalies for the belt were computed from the mean rainfall data. Graphs were used to depict rainfall trends in the coastal belt of Nigeria. In order to determine whether the difference between the mean rainfall of 1916-1961 and 1962-2007 is statistically significant, Student’s t test was used. The results show that there is a decrease in rainfall in the coastal belt of Nigeria with Port Harcourt and Lagos indicating sharper decrease. It is concluded that although the decrease in rainfall in the coastal belt of Nigeria of Nigeria is not statistically, the near persistent departure of mean rainfall from the 1916-2007 normal since 1970 is an indication of change in rainfall pattern. It is also concluded that the upsurge in flood disasters and other climate-related hazards in the coastal belt of Nigeria are due to increase in rainstorms and not increase in rainfall amount. The paper recommends that land use practices in the area should of necessity put the adverse consequences of change in rainfall pattern into consideration since a radical change in land use could change the weather pattern of an area|
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