The Okavango River Basin – Challenges & Opportunities. OKACOM, 2003, Corvallis Several slides compiled by Dr Peter Ashton – CSIR (2002)

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Presentation transcript:

The Okavango River Basin – Challenges & Opportunities. OKACOM, 2003, Corvallis Several slides compiled by Dr Peter Ashton – CSIR (2002)

MAKGADIKGADI CATCHMENT Map sourced from GEF Report on Okavango Delta Study 100 km N ZAMBIA Boteti River basin ZIMBABWE NAMIBIA ANGOLA BOTSWANA R.S.A. Deception Pan basin Ntwetwe Pan basin Sowa Pan basin Okavango Basin Lake Ngami Okwa R. Nata R. Omatako R. Cubango R. Okavango Delta Cuito R. Kavango R. Cuando R. Chobe R. Zambezi R.

RAINFALL DISTRIBUTION

VARIABLE ANNUAL INFLOWS AT MOHEMBO ( )

TIMING OF DELTA RAINFALL INFLOW AND OUTFLOW JJASONDJFMAMJJASONDJFM Rainfall (mm) Inflow (10 6 m 3 ) Outflow (10 6 m 3 ) Outflow Volume (Thamalakane) Inflow Volume (Mohembo) Rainfall (Average of Shakawe plus Maun)

DELTA WATER BALANCE RIVER INFLOWS + 76 % OUTFLOW - 3 % DIRECT EVAPOTRANSPIRATION - 84 % DIRECT RAINFALL + 24 % RIPARIAN SOILS & GROUNDWATER - 13 %

PROJECTED WATER NEEDS IN OKAVANGO BASIN Anticipated total water requirement = 300 million m 3 / year in 2020

RATIFIED INTERNATIONAL CONVENTIONS Country Treaty / Protocol Ratification Date RamsarUNCBDUNCCDUNCSWUNFCCC AngolaN/P01/04/9830/06/97N/P17/05/00 Botswana09/12/9612/10/9511/09/96N/P27/01/94 Namibia23/08/9516/05/97 N/P19/05/95 N/P = Not yet party to Treaty / Protocol

RAMSAR SITE LOCATION

MOSAIC OF HABITATS The Okavango Delta has an enormous variety of different habitat types and a diverse array of aquatic and terrestrial species

OKAVANGO – CUITO CONFLUENCE Cuito River Kavango River ANGOLA NAMIBIA