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Apparent water losses related to municipal metering in South Africa
Expanded Title:While apparent losses look like real losses to a municipality, this is not actually the case. The main components of apparent losses are water meter under-registration and unauthorized consumption, but meter reading and data errors are also contributing factors. Thus the objective of this study was to estimate the extent of apparent losses due to meter under registration in South Africa. The occurrence and flow rate distributions of on-site leakage were measured in Cape Town and Mangaung using the same methodology as an earlier Johannesburg study. The study found that based on on-site leakage investigations in Cape Town, Mangaung and Johannesburg it is estimated that the meter under-registration error for on-site leakage will be 15 % of the registered leakage rate. This is equal to roughly 2.2 % of demand. The total meter under-registration error in middle to high income areas is thus estimated to be 5 % of consumption. In low income areas, on-site leakage occurs at much higher incidence and thus meter under registration can be expected to be higher. A review of meter audits done on bulk consumers showed that a lot more needs to be done to ensure that these meters are correctly sized, installed and in good condition. Based on the increase in revenue investigations after the meter audits performed in Tshwane and Ekurhuleni, it seems that apparent losses of bulk consumers are potentially around 20 %.
Date Published:01/08/2012
Document Type:Research Report
Document Subjects:Drinking water - Water supply, Sanitation - On site sanitation
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:1998/1/12
ISBN No:978-1-4312-0313-0
Authors:Couvelis FA; Van Zyl JE
Project No:K5/1998
Organizations:Department of Civil Engineering University of Cape Town
Document Size:3 846 KB
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