Western Cape Dam Levels: 100% Expected Due to Heavy Rainfall

Due to recent high rains, water experts anticipate that at least two dams in the Western Cape may be filled to capacity over the next few days. Dr. Kevin Winter, a professor and water specialist at the University of Cape Town, said: “As you know, we are now experiencing good rainfall, which has caused the majority of the major dams to overflow. Both Theewaterskloof (77% full when I last checked) and Voelvlei (just over 50% full) are continually filling up. “These two dams are the only ones that haven’t reached 100%. Theewaterskloof will benefit from the rain that fell over the past 24 hours, but it will take a few days before we can verify how much the inflowing streams have raised the levels.

Western Cape Dam Levels

Western Cape Dam Levels

“Voelvlei is now a bit unknown because the last cold front delivered heavy rainfall to the Southern Cape, but I won’t see any data for the past 24 hours until later tomorrow. In any event, following a large rainfall, it takes a few days until the dams fill. Winter said that the City’s water dashboard included information for the Western Cape water storage system dating all the way back to 2008. “Since 2008, there have been six instances of the storage dams being completely filled. The last time the whole storage levels were at 100% was in 2014,” he noted.

DamRiverFSCThis WeekLast WeekLast Year
Bellair DamBrak River4.3#33.633.65.3
Berg River DamBerg River127.1102.7 101.969.1
Brandvlei DamLower Brandvlei River286.153.8 48.036.6
Buffeljags DamBuffeljags River4.6102.8102.899.3
Bulshoek DamOlifants River4.988.6 79.150.8
Calitzdorp DamNels River4.9100.4 100.775.1
Ceres DamKoekedou River17.360.2 47.357.5
Clanwilliam DamOlifants River122.553.3 20.825.9
De Bos DamOnrus River5.8100.0100.073.5
Duiwenhoks DamDuiwenhoks River6.2100.9 101.199.9
Eikenhof DamPalmiet River28.9105.6105.657.9
Elandskloof DamElands River11.098.5 74.929.8
Ernest Robertson DamGroot Brak River0.5101.1 101.496.8
Floriskraal DamBuffels River48.328.1 27.423.4
Gamka DamGamka River1.899.9 99.8100.0
Gamkapoort DamGamka River35.8100.0100.079.7
Garden Route DamSwart River10.0100.0100.088.8
Haarlem DamGroot River4.7101.0 100.866.2
Hartebeestkuil DamHartenbos River7.233.0 5.86.3
Kammanassie DamKammanassie River34.433.2 30.83.8
Keerom DamNuy River9.8#100.0#100.017.4
Klipberg DamKonings River2.0100.1 99.954.1
Klipheuwel DamTributary of Hartenbos River4.557.0 52.615.8
Korentepoort DamKorinte River8.1100.8 100.987.8
Kwaggaskloof DamDoorn River169.552.3 46.637.4
Lakenvallei DamSanddrifskloof River10.587.3 85.081.6
Leeugamka DamLeeu River13.660.5 60.880.9
Miertjieskraal DamBrand River1.5100.5 100.770.5
Misverstand DamBerg River5.7133.3 132.3102.8
Oukloof DamCordiers River4.219.0 14.66.1
Pietersfontein DamPietersfontein River2.0#87.887.819.6
Poortjieskloof DamGroot River9.8#
Prinsrivier DamPrins River2.3#96.696.680.0
Roode Els Berg DamSanddrifskloof River7.846.8 33.616.6
Roodefontein DamPiesang River2.084.5 81.292.5
Steenbras-Lower DamSteenbras River33.994.9 84.258.4
Steenbras-Upper DamSteenbras River31.9102.3 102.082.6
Stettynskloof DamHolsloot River14.8106.1 105.442.4
Stompdrift DamOlifants River46.323.6 23.320.8
Theewaterskloof DamRiviersonderend River479.376.7 63.866.1
Tierkloof DamTributary of Seweweekspoort River0.1100.0100.099.1
Voelvlei DamVoelvlei River158.654.1 45.955.9
Wemmershoek DamWemmers River58.897.1 83.947.8
Wolwedans DamGroot Brak River24.7100.2 100.384.2






The Western Cape dams’ water capacity has increased by 11% since this time last year, according to the Department of Water and Sanitation (DWS), and experts anticipate an additional rise in the coming days. The sluggish rate at which the province’s dams were filling up caused considerable alarm among water consumers earlier this year, according to DWS. Naturally, the dam levels at the time were far lower than they had been the previous two years. The Western Cape storage dams’ condition has worsened during the past two weeks as a result of the torrential rain that fell throughout the whole region. The aggregate full capacity of the dams in the Cape Town system was 79.31%, up from 63.92% at this time last year. The overall storage for all DWS-monitored dams in the province stands at 68,71%, up more than 11% from the previous year, according to “The Western Cape State of Dams.” Thirteen dams had increases of more than 5%, including the Ceres, Bulshoek, Karee, and Kwaggaskloof dams.

The fact that no dams were lowered this week is encouraging. Although the Gouritz Catchment receives some sizable rainfall, the Coastal Belt receives the majority of its precipitation in the summer. “Ten of the catchment’s dams—the majority of which are agricultural dams are at 100% capacity. The Theewaterskloof Dam, which supplies water to 54% of the Western Cape Water Supply System Dams and is the largest dam in the province, achieved 76,67%, a respectable output for this time of year. The agency was observing how the province-wide dam storages were being topped off. Stella Nake, a senior forecaster for South Africa’s weather services, predicted that the recent rains will have a substantial impact on dam levels in the Western Cape. So stay tuned to PKB news for further updates.

Prakash Israni

Prakash Israni Is a 'self-proclaimed' professional in the ITES industry for 20 years, though prefer being tagged as a novice and a learner.

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