Trophic Status of South African Impoundments

From the National Eutrophication Monitoring Programme site

Explanation of classification terms and colour coding.

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Last edited (fix dead links) 2018-12-21 08:32

Dam name
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Mean TP mg/L n TP Mean Annual Chlorophyll a (µg/l) n Chl Per cent of time Chl a > 30 µg/l Trophic status Comment
Albasini 0.014 2 1.6 2 0 Oligotrophic Negligible potential and current algal productivity
Albert Falls 0.03 26 9.9 26 8 Oligotrophic Moderate potential and current algal productivity
Allemanskraal 0.083 3 1.5 4 0 Oligotrophic Significant potential and negligible current algal productivity
Bloemhof 0.114 42 63.6 19 30 Hypertrophic Significant potential and current algal productivity
Boegoeberg 0.216 17 6.1 17 0 Oligotrophic Serious potential and negligible current algal productivity
Bon Accord 0.63 20 326.7 21 93 Hypertrophic Serious potential and current algal productivity
Boskop 0.048 42 1 14 0 Oligotrophic Significant potential and negligible current algal productivity
Bospoort 0.791 9 4123 10 75 Hypertrophic Serious potential and current algal productivity
Bronkhorstspruit 0.074 44 35.9 22 47 Hypertrophic Significant potential and current algal productivity
Buffelspoort 0.028 5 5 3 0 Oligotrophic Moderate potential and negligible current algal productivity
Cooks Lake 0.345 4 20.8 3 42 Eutrophic Serious potential and significant current algal productivity
Disaneng 0.044 46 3.9 5 0 Oligotrophic Moderate potential and negligible current algal productivity
Douglas 0.051 39 8.5 7 19 Oligotrophic Significant potential and current algal productivity
Driekloof 0.043 7 - - - - Moderate potential for algal productivity
Driekoppies - - 2.7 9 0 Oligotrophic Negligible current algal productivity
EJ Smith 0.041 10 17.7 12 17 Mesotrophic Moderate potential and significant current algal productivity
Erfenis 0.289 1 2.3 1 0 Oligotrophic Serious potential and negligible current algal productivity
Gariep 0.049 17 1.6 15 0 Oligotrophic Significant potential and negligible current algal productivity
Grootdraai 0.063 12 8.4 6 15 Oligotrophic Significant potential and current algal productivity
Gubu 0.02 7 - - - - Moderate potential for algal productivity
Hartbeespoort 0.254 109 167.1 106 47 Hypertrophic Serious potential and significant current algal productivity
Hazelmere 0.033 17 3.1 26 0 Oligotrophic Moderate potential and negligible current algal productivity
Henkries 0.038 6 11.9 17 14 Mesotrophic Moderate potential and significant current algal productivity
Henley 0.004 26 4.4 26 0 Oligotrophic Negligible potential and current algal productivity
Inanda 0.024 28 3.7 28 0 Oligotrophic Moderate potential and negligible current algal productivity
Kalkfontein 0.059 26 - - - - Significant potential for algal productivity
Klipfontein 0.117 25 20 3 37 Eutrophic Significant potential and current algal productivity
Klipvoor 0.777 22 104 21 78 Hypertrophic Serious potential and current algal productivity
Knellpoort 0.032 8 3 10 0 Oligotrophic Moderate potential and negligible current algal productivity
Koppies 0.1 16 8.1 11 7 Oligotrophic Significant potential and moderate current algal productivity
Koster 0.059 23 11 14 15 Mesotrophic Significant potential and current algal productivity
Krugersdrift 0.135 8 - - - - Serious potential for algal productivity
Laing 0.485 16 4.2 8 0 Oligotrophic Serious potential and negligible current algal productivity
Lindleyspoort 0.041 26 5.3 14 0 Oligotrophic Moderate potential and negligible current algal productivity
Loskop 0.027 6 2.4 4 0 Oligotrophic Moderate potential and negligible current algal productivity
Lotlamoreng 0.207 4 8.2 4 0 Oligotrophic Serious potential and negligible current algal productivity
Luphephe 0.028 2 - - - - Moderate potential for algal productivity
Magoebaskloof 0.043 2 1.4 3 0 Oligotrophic Moderate potential and negligible current algal productivity
Maguga 0.022 8 1.8 5 0 Oligotrophic Moderate potential and negligible current algal productivity
Middelburg 0.031 22 1.3 21 0 Oligotrophic Moderate potential and negligible current algal productivity
Middle Letaba 0.021 5 1.5 3 0 Oligotrophic Moderate potential and negligible current algal productivity
Midmar 0.066 26 3 26 0 Oligotrophic Significant potential and negligible current algal productivity
Misverstand 0.098 15 21.1 11 20 Eutrophic Significant potential and current algal productivity
Modimola 0.142 43 13.21 7 2 Mesotrophic Serious potential and moderate current algal productivity
Mutshedzi 0.023 2 3.3 4 0 Oligotrophic Moderate potential and negligible current algal productivity
Nagle 0.027 24 9.5 24 0 Oligotrophic Moderate potential and negligible current algal productivity
Nahoon 0.099 4 1.4 3 0 Oligotrophic Significant potential and negligible current algal productivity
Neusberg Noord 0.057 15 20.92 15 15 Eutrophic Significant potential and current algal productivity
Nooitgedacht 0.035 1 - - - - Moderate potential for algal productivity
Nsami 0.035 5 19.1 4 33 Mesotrophic Moderate potential and significant current algal productivity
Nungwane 0.018 17 5.3 27 0 Oligotrophic Moderate potential and negligible current algal productivity
Nwanedi 0.03 3 8.75 1 0 Oligotrophic Moderate potential and negligible current algal productivity
Nzhelele 0.015 1 - - - - Negligible potential for algal productivity
Olifantsnek 0.057 1 - - - - Significant potential for algal productivity
Orange River At Upington 0.06 16 17.35 5 0 Mesotrophic Significant potential and negligible current algal productivity
Rietvlei 0.38 20 63.7 21 33 Hypertrophic Serious potential and significant current algal productivity
Roodekopjes 0.059 13 16.8 8 30 Mesotrophic Significant potential and current algal productivity
Roodeplaat 0.194 100 46.6 100 41 Hypertrophic Serious potential and significant current algal productivity
Roodepoort 0.165 5 13.8 5 33 Mesotrophic Serious potential and significant current algal productivity
Shongweni 0.059 22 24.7 22 36 Eutrophic Significant potential and current algal productivity
Spitskop 0.092 20 24.9 3 40 Eutrophic Significant potential and current algal productivity
Sterkfontein 0.026 35 2.1 17 0 Oligotrophic Moderate potential and negligible current algal productivity
Taung 0.033 37 3.6 16 0 Oligotrophic Moderate potential and negligible current algal productivity
Tzaneen - - 1.5 6 0 Oligotrophic Negligible current algal productivity
Umtata 0.078 6 1.4 13 0 Oligotrophic Significant potential and negligible current algal productivity
Mzinto 0.035 9 10.4 11 0 Mesotrophic Moderate potential and negligible current algal productivity
Vaal Barrage 0.069 10 8.4 6 10 Oligotrophic Significant potential and current algal productivity
Vaal 0.077 46 14.78 16 17 Mesotrophic Significant potential and current algal productivity
Vaalkop 0.114 1 - - - - Significant potential for algal productivity
Vanderkloof 0.039 13 - - - - Moderate potential for algal productivity
Voelvlei 0.046 16 6.3 19 7 Oligotrophic Moderate potential and current algal productivity
Vondo 0.022 10 2.5 6 0 Oligotrophic Moderate potential and negligible current algal productivity
Vygeboom 0.012 1 - - - - Negligible potential for algal productivity
Welbedacht 0.076 10 11.7 8 12 Mesotrophic Significant potential and current algal productivity
Witbank 0.04 21 16 22 25 Mesotrophic Moderate potential and significant current algal productivity
Wriggleswade 0.039 7 - - - - Moderate potential for algal productivity