Rainfall response to dam/irrigation projects in northern Nigeria

  • GN Chima
  • MO Nwagbara
  • MA Ijioma
Keywords: Dam/Irrigation projects, climate change, trend modeling, and rainfall trends


In this paper, we examine the possibility that the increasing number and size of dam/irrigation projects in northern Nigeria are having a  corresponding increase in rainfall in spite of the threat of climate change. We modeled the rainfall trends over 11 meteorological stations over a period of 34 years (1971 - 2004). The trends were compared with each other based on the closeness of the meteorological stations with dam/irrigation projects. Results obtained showed a compelling evidence of a direct relationship between rainfall and dam/irrigation projects. The results indicated that the average rate of change in rainfall trends for the 11 stations ranged from – 4.08 to 24.83mm per annum. Kano area had 24.83mm while Jos area had - 4.08. Results obtained in this study thus provide evidence as to the extent that rainfall has responded to dam/irrigation projects.

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eISSN: 1596-6216