| BUFFALO RIVER: Hydrology and geohydrology |
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eWISA Home | BUFFALO: MAIN INDEX | ALPHABETICAL LIST OF RIVERS | ||||||||||||||||||||||
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Map of the BUFFALO River |
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| HYDROLOGY | |||||||||||||||||||||||
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"Evaporation rates are 160-170 mm per month in December and January, reducing to 70 mm during June and July." (Ref 1) | ||||||||||||||||||||||
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The natural mean annual run-off (MAR) for the ISP area is 1 586 million m3/a, with the Amatole catchments contributing 559 million m3/a (35%). | ||||||||||||||||||||||
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The mean annual precipitation (MAP) varies from 500 mm in some of the river valleys to over 1 000 mm in the upper Buffalo River catchment. The mean annual evaporation (MAE) varies from between 1300mm and 1400mm along the coastal belt, increasing in a north westerly direction to between 1400 mm and 1500 mm. (Ref 3) | ||||||||||||||||||||||
| GEOHYDROLOGY | |||||||||||||||||||||||
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| References | |||||||||||||||||||||||
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(Ref
1:www.csir.co.za/rhp/state_of_rivers/buffalo04/ECape%20Buffalo%20River_2004.pdf)
Ref 3: Department of Water Affairs and Forestry, South Africa. 2004. Mzimvubu to Keiskamma Water Management Area : Amatole – Kei Internal Strategic Perspective. Prepared by FST Consulting Engineers (Pty) Ltd in association with Tlou & Matji and Umvoto Africa, on behalf of the Directorate : National Water Resource Planning. DWAF Report No. P WMA 12/000/00/0404. |
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