Climate Change Impacts on Hydrology in Africa: Case Studies of River Basin Water Resources

  • M.C. ToddEmail author
  • L. Andersson
  • C. Ambrosino
  • D. Hughes
  • Dominic R. Kniveton
  • L. Mileham
  • M. Murray-Hudson
  • S. Raghavan
  • R. Taylor
  • P. Wolski
Part of the Advances in Global Change Research book series (AGLO, volume 43)


There is a growing consensus that anthropogenic climate change is a real phenomenon. There is strong evidence that changes to the hydrological cycle have occurred and will continue to do so in the future. Given our dependence on water resources and ecosystem services associated with the river system, this means it is important that appropriate adaptation strategies are developed. Such policies require information on future behaviour of the climate system and impacts on surface hydrology at the river basin scale. This chapter presents two contrasting case studies from river systems in Africa, in which climate change impacts on hydrology are examined. The methodology of climate change impact assessment is described and critically examined with particular respect to quantification of uncertainties. Finally, the implications for water resource management policy are considered.


Southern Africa Hydrology River systems Water resources Ecosystem services Impacts Water resource management policy 



The authors would like to warmly acknowledge the agencies that provide funding for the work described in this chapter. For the Okavango river the WERRD project was funded by the EU under the INCO-DEV programme. Subsequent work on hydro-climate has been undertaken within the UK NERC QUEST-GSI and through a NERC-Dorothy Hodgkin studentship, whilst the ACCORD project on Okavango delta biodiversity was funded by the UK DEFRA Darwin Initiative. The research on the River Mitano has been supported through the UK NERC QUEST-GSI project and a NERC studentship.


  1. Alexander LV, co-authors (2006) Global observed changes in daily climate extremes of temperature and precipitation. J Geophys Res 111:D05109. doi:10.1029/2005JD006290CrossRefGoogle Scholar
  2. Andersson L, Wilk J, Todd MC, Hughes D, Kniveton D, Layberry Rand, Savenije HHG (2006) Scenarios of the impact of changes of climate and water use on water flow in the okavango river. J Hydrol 331:43–57CrossRefGoogle Scholar
  3. Arnell NW (2004) Climate change and global water resources: SRES emissions and socio economic scenarios. Glob Environ Change 14:31–52CrossRefGoogle Scholar
  4. Bates BC, Kundzewicz ZW, Wu S, Palutikof JP (eds) (2008). Climate change and water. Technical paper of the Intergovernmental Panel on Climate Change, IPCC Secretariat, Geneva, p 210Google Scholar
  5. Brohan P, co-authors (2006) Uncertainty estimates in regional and global observed temperature changes: a new dataset from 1850. J Geophys Res 111:D12106. doi:10.1029/2005JD006548CrossRefGoogle Scholar
  6. Christensen JH, Hewitson B, Busuioc A, Chen A, Gao X, Held I, Jones R, Kolli RK, Kwon W-T, Laprise R, Magaña Rueda V, Mearns L, Menéndez CG, Räisänen J, Rinke A, Sarr A, Whetton P (2007) Regional climate projections. In: Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt KB, TignorM, Miller HL(eds) Climate change 2007: the physical science basis. Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge and New York, NYGoogle Scholar
  7. Commission for Africa (2005). Our common interest: report of the Commission of Africa. pp 464 [Available online at]
  8. Crerar S (1997). The hydrology of the Okavango River upstream of the Okavango Delta. In: Feasibility study on the Okavango River to Grootfontein Link of the Eastern National Water Carrier. Department of Water Affairs, Ministry of Agriculture, Water and Rural DevelopmentGoogle Scholar
  9. Dai A, Lamb PJ, Trenberth KE, Hulme M, Jones PD, Xie P (2004a) The recent sahel drought is real. Int J Climatol 24:1323–1331CrossRefGoogle Scholar
  10. Dai A, Trenberth KE, Qian T (2004b) A global dataset of palmer drought severity index for 1870–2002: relationship with soil moisture and effects of surface warming. J Hydrometeorol 5:1117–1130CrossRefGoogle Scholar
  11. Diniz AC, Aguiar FP (1973). Recursos em terras com aptida˜o para o regadio da bacia do Cubango, Se´rie Te´cnica, no. 33, Instituto de Investigac¸a˜o Agrono´mica de Angola, Nova Lisboa, Angola, 1973, pp 27 (in Portuguese)Google Scholar
  12. Ellery WN, McCarthy TS (1994) Principles for the sustainable utilisation of the okavango delta ecosystem: botswana. Biol Conserv 70:159–168CrossRefGoogle Scholar
  13. Foster S, Tuinhof A, Garduno H (2006). Groundwater development in Sub-Saharan Africa. A strategic overview of Key issues and major needs. Sustainable groundwater management, lessons from practice, Case profile collection number 15.Google Scholar
  14. Giannini A, Saravanan R, Chang P (2003) Oceanic forcing of sahel rainfall on interannual to interdecadal time scales. Science 302:1027–1030CrossRefGoogle Scholar
  15. Green Cross International (2000). The Okavango river basin. Transboundary basin sub projects: the Okavango. Available from
  16. Hargreaves GH, Allen RG (2003) History and evaluation of hargreaves evapotranspiration equation. J Irrig Drain Engrg 129:53–63CrossRefGoogle Scholar
  17. Hughes D, Andersson L, Wilk J, Savenije HHG (2006) Regional calibration of the pitman model for the okavango river. J Hydrol 331:30–42CrossRefGoogle Scholar
  18. Jones RG, Noguer M, Hassell DC, Hudson D, Wilson SS, Jenkins GJ, Mitchell JFB (2004) Generating high resolution climate change scenarios using PRECIS. Met Office Halley Centre, Exeter, p 40Google Scholar
  19. Jury MR (2003) The coherent variability of african river flows: composite climate structure and the atlantic circulation. Water SA 29:1–10Google Scholar
  20. Kutzbach JE, Williams JW, Vavrus SJ (2005) Simulated 21st century changes in regional water balance of the great lakes region and links to changes in global temperature and poleward moisture transport. Geophys Res Lett 32:L17707. doi:10.1029/2005GL023506CrossRefGoogle Scholar
  21. Mbaiwa JE (2004) Causes and possible solutions to water resources conflicts in the okavango river basin: the case of angola, namibia and botswana. Phys Chem Earth 29:1319–1326Google Scholar
  22. McCarthy J, Gumbricht T, McCarthy TS, Frost PE, Wessels K, Seidel F (2004) Flooding patterns in the okavango wetland in botswana, between 1972 and 2000. Ambio 7:453–457Google Scholar
  23. Meehl GA, Stocker TF, Collins WD, Friedlingstein P, Gaye AT, Gregory JM, Kitoh A, Knutti R, Murphy JM, Noda A, Raper SCB, Watterson IG, Weaver AJ, Zhao Z-C (2007) Global climate projections. In: Solomon S, Qin D, Manning M, ChenZ, Marquis M, Averyt KB, Tignor M, Miller HL (eds) Climate change 2007: the physical science basis, Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge and New York, NYGoogle Scholar
  24. Mendelsohn J, el Obeid S (2003) Sand and water: a profile of the kavango region. Struik Publishers, Cape TownGoogle Scholar
  25. Mileham L, Taylor RT, Thompson J, Todd MC, Tindimugaya C (2008) Impact of rainfall distribution on the parameterisation of a soil-moisture balance model of groundwater recharge in equatorial africa. J Hydrol 359:46–58CrossRefGoogle Scholar
  26. Milly PCD, Dunne KA, Vecchia AV (2005) Global pattern of trends in streamflow and water availability in a changing climate. Nature 438(7066):347–350CrossRefGoogle Scholar
  27. Murray-Hudson M, Wolski P, Ringrose S (2006) Scenarios of the impact of local and upstream changes of climate and water use on hydro-ecology in the okavango delta. J Hydrol 331(1):73–84CrossRefGoogle Scholar
  28. MWLE (2006). Water Authorities Division quarter four and annual inspection report. Unpublished report. Ministry of Water, Lands and Environment, Directorate of Water DevelopmentGoogle Scholar
  29. Nakicenovic N, Swart R (eds) (2000). Emissions scenarios. 2000 Special report of the Intergovernmental Panel on Climate Change, Cambridge University PressGoogle Scholar
  30. New M, Lopez A, Dessai S, Wilby R (2007) Challenges in using probabilistic climate change information for impact assessments: an example from the water sector. Philos Transact A: Math Phys Eng Sci 365:2117–2131CrossRefGoogle Scholar
  31. Pinheiro I, Gabaake G, Heyns P (2003) Cooperation in the okavango river basin: the OKACOM perspective. In: Turton A, Ashton P, Cloete E (eds) Transboundary rivers, sovereignty and development: hydropolitical drivers in the Okavango river basin. African Water Issues Research Unit/Green Cross International/University of Pretoria, Pretoria, pp 105–118Google Scholar
  32. Pitman WV (1973). A mathematical model for generating river flows from meteorological data in South Africa. Report No. 2/73, Hydrological Research Unit, University of the Witwatersrand, Johannesburg, South AfricaGoogle Scholar
  33. Population Reference Bureau (2005) World population data sheet. pp17 [Available online at]
  34. Ravallion S, Chen M (2004) How have the world’s poorest fared since the early 1980s? The World Bank Research Observer 19(2):141–169CrossRefGoogle Scholar
  35. Shiklamanov I (2000) World water resources and water use, present assessment and outlook for 2025. In: Rijkeman FR (ed) World water scenarios analyses. Earthscan publications, London, pp 160–203Google Scholar
  36. Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt KB, Tignor M, Miller HL (eds) (2007) Climate change 2007: the physical science basis, Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge and New York, NYGoogle Scholar
  37. Stainforth DA, Allen MR, Tredger ER, abd Smith LA (2007a) Confidence, uncertainty and decision-support relevance in climate predictions. Phil Trans R Soc A 365:2145–2161. doi:10.1098/rsta.2007.2074CrossRefGoogle Scholar
  38. Stainforth DA, Downing TE, Washington R, Lopez A, New M (2007b) Issues in the interpretation of climate model ensembles to inform decisions. Phil Trans R Soc A 365:2163–2177. doi:10.1098/rsta.2007.2073CrossRefGoogle Scholar
  39. Trenberth KE, Jones PD, Ambenje P, Bojariu R, Easterling D, Klein Tank A, Parker D, Rahimzadeh F, Renwick JA, Rusticucci M, Soden B, Zhai P (2007) Observations: surface and atmospheric climate change. In: Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt KB, Tignor M, Miller HL (eds) Climate change 2007: the physical science basis, Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge and New York, NYGoogle Scholar
  40. UNCTAD (2004). Economic development in Africa: Trade performance and commodity dependence. Publication UNCTAD/GDS/AFRICA/2003/1, p 84Google Scholar
  41. UNDESA (2006). World Population Prospects: The 2006 revision and World Urbanization Prospects: The 2005 revision,, Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat.
  42. Vörösmarty CJ, Douglas EM, Green PA, Revenga C (2005) Geospatial indicators of emerging water stress: an application to africa. Ambio 34(3):230–236Google Scholar
  43. Washington R, Harrison M, Conway D, Black E, Challinor A, Grimes D, Jones R, Morse A, Gillian Kay G, Todd MC (2006) African climate change: taking the shorter route. Bull Am Meteorol Soc 87:1355–1366CrossRefGoogle Scholar
  44. Wolf AT, Yoffe SB, Giordano M (2003). International waters: indicators for identifying basins at risk. UNESCO-IHP-VI, Technical documents in hydrology, PC-CP, Series, no 20. p 30Google Scholar
  45. Wolski P, Savenije HHG, Murray-Hudson M, Gumbricht T (2006) Modelling of the hydrology of the okavango delta. J Hydrol 331(1):58–72CrossRefGoogle Scholar
  46. World Bank (2005). World development indicators. p 440. [Available online at]
  47. World Water Assessment Program 2003. Water for people, water for life, UN World Water Development Report, WWAP, UNESCO, ParisGoogle Scholar
  48. World Water Forum (2000) The africa water vision for 2025: equitable and sustainable use of water for socioeconomic development. World Water Forum, The Hague, p 30Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • M.C. Todd
    • 1
    Email author
  • L. Andersson
    • 2
  • C. Ambrosino
    • 3
  • D. Hughes
    • 4
  • Dominic R. Kniveton
    • 5
  • L. Mileham
    • 3
  • M. Murray-Hudson
    • 6
  • S. Raghavan
    • 7
  • R. Taylor
    • 3
  • P. Wolski
    • 6
  1. 1.Department of GeographyUniversity College London (UCL)LondonUK
  2. 2.Swedish Meteorological and Hydrological InstituteNorrköpingSweden
  3. 3.Department of GeographyOrganization University CollegeLondon (UCL)UK
  4. 4.Institute for Water ResearchRhodes UniversityGrahamstownSouth Africa
  5. 5.Department of GeographyUniversity of SussexBrightonUK
  6. 6.HOORC, University of BotswanaGaboroneBotswana
  7. 7.University of MarylandCollege ParkUSA

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