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GeoJournal

, Volume 61, Issue 2, pp 111–119 | Cite as

Implications of climatic variability and climate change for water resources availability and management in West Africa

  • O. Ojo
  • S. O. Gbuyiro
  • C. U. Okoloye
Article

Abstract

The paper examines: (a) trends in climatic variations and variability with particular emphasis on rainfall (b) the characteristics of climatic events, including floods and droughts, (c) seasonal variations in river flows, (d) mean annual trends in river flows and discharges, (e) local variations of extremes of rainfall and river discharges, (f) the effects of climatic variability and climate change on ground water variations, (g) the problems of acute shortage of freshwater, and (h) the prevalence of water stress whose characteristics would be worsened with the projected impacts of climate change. The results show that: (i) there are a lot of spatial and temporal variations in the characteristics of rainfall and the hydrological systems locally and regionally, although in general, there have been downward trends in rainfall and increases in water deficits and drought events, (ii) that flood events, which also have impacted adversely in many parts of the region, have also been witnessed. The paper then produces projections for future urban and rural water supplies in Nigeria, which is an epitome of West Africa and examines the two main categories of adaptation measures needed to improve water management, namely, those involving the water supply and water demand systems in the study region. Finally, the paper discusses the need to address a number of mechanisms for implementation of the various adaptation measures including: (a) building capacity and manpower, (b) promoting education and public awareness, (c) public participation and the involvement of stakeholders, (d) the establishment of both national and regional co-operation, and (e) the need for climatic and other environmental data collection and monitoring.

climate change climatic variability rainfall river regimes water resources 

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References

  1. Adewale A. 2000: 'Monitoring Aspects of Changes in Hydrological Characteristics in the Sokoto River Basin ', African Climatological Research Series, Vol. 5, SEDEC Publishers, Lagos, pp. 1–20Google Scholar
  2. Feenstra J. F., Burton Ian, Smith J. B. and Tol Richard S. J. 1998: Handbook on Methods for Climate Change Impact Assessment and Adaptation Strategies, Version 2. UNEP Publications.Google Scholar
  3. Gbuyiro S. O. 1998: On rainfall variability, ENSO and its relationship with Nigerian rainfall, M. Sc. Thesis, University of Lagos, Lagos, Nigeria.Google Scholar
  4. Okoloye C. U. 1998: Characteristics of weather systems and implica-tions for rainfall variabilities in West Africa. M. Sc. Thesis, University of Lagos, Lagos, Nigeria.Google Scholar
  5. Lamb P. J. 1980: 'Sahelian drought', New Zealand Journal of Geogra-phy 68: 12–16.Google Scholar
  6. Lamb P. J. 1983: 'Sub-saharan rainfall update for 1982: continued drought', Journal of Climatology 3: 419–422.Google Scholar
  7. Ledger D. C. 1969: 'The dry season. ow characteristics of West African rivers ', In: Thomas M. F. and Whittington G. W. (eds. ), Environment and Landuse in Africa, pp. 82–102.Google Scholar
  8. Ojo O. 1987: Hydroclimatic consequences of climatic events in West Africa: the lessons of the Sahelian droughts, IAHS no. 64, 229–238.Google Scholar
  9. Ojo O. 1989: Hydroclimatological aspects of groundwater variability and reliability in West Africa: the lessons of the consequences of the recent climatic events in West Africa. Proceedings of the Interna-tional Symposium on Groundwater Management Quantity and Quality, Benidorm, Spain, 2–5 October 1989.Google Scholar
  10. Ojo O 2003: Adaptation strategies for climate change. Report of project for Nigeria for National Communications to the UNFCCC, p. 35.Google Scholar
  11. Oni F. O. 2002: Implications of climatic variations and changes on rainfed agriculture in the Kano region. Ph. D. Thesis, University of Lagos.Google Scholar
  12. WMO/TD NO. 982 1999: Climate forecasting for hydrology in Africa, published by Centre Africain pour les applications de la meteorol-ogie au developmment, 80 pp.Google Scholar

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • O. Ojo
    • 1
  • S. O. Gbuyiro
    • 1
  • C. U. Okoloye
    • 1
  1. 1.Department of GeographyUniversity of LagosLagosNigeria (

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