GROOTBRAK RIVER: Hydrology and geohydrology

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Map of the GROOTBRAK River

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HYDROLOGY
The mean annual run-off (MAR) as measured at the Wolwedans gauging station for the periode 1961 -1980 was 18,19 x 106m3 .  Annual run-off fluctuates widely:  from 4,3 x 106m3  in 1979/80 to 44,5 x 106m3 in 1962/63.
The normal rate of flow in the Great Brak has been considerably reduced during recent years by afforestation, damming of small tributaries by farmers and the building of the Ernest Robertson dam (WMS Franklin, in litt.,1979).  (Ref 1)
Flood Groot Brak River1.JPG (44145 bytes) Flood Groot Brak River2.JPG (39385 bytes) Flood Groot Brak River3.JPG (31352 bytes) Flood Groot Brak River4.JPG (47124 bytes) Flood Groot Brak River5.JPG (47205 bytes)
Flood Groot Brak River6.JPG (36595 bytes) Flood Groot Brak River7.JPG (30259 bytes)
IMG_1416_14.JPG (66991 bytes) IMG_1420_18.JPG (110628 bytes) IMG_1421_19.JPG (130605 bytes) IMG_1427_21.JPG (85002 bytes)
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