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- W3169039835 abstract "Abstract We calculate the first distributional statistics for municipal water use with 14.9 million monthly billing records for a half million households in Cape Town, South Africa, from 2014 to 2018. These years span a historic drought and a multi‐faceted package of conservation programs that achieved a 50% citywide drop in consumption. We find that the top 10% of households consumed 31% of water before the drought, with the Gini coefficient showing clear seasonal peaks driven by outdoor water use. Matching billing records to fine‐grained census data from 2011, we find that the correlation between income and water use in the winter was 0.08 but rose to 0.36 during outdoor watering seasons. This correlation declines before switching signs by the end of the drought. The city's increasing block tariff implied that the top 10% of users generate 50%–60% of utility revenues. Although before the drought these top users were more likely to be high income, the composition of top water users changed during the drought. Average income of top users during the drought was 35% lower than the average income of top users before the drought. Our results suggest that Cape Town's policy of providing a free allowance of 10.5 kL (m 3 ) per month to qualify indigent households helped protect many, but not all, from multiple steep tariff increases." @default.
- W3169039835 created "2021-06-22" @default.
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- W3169039835 date "2021-06-01" @default.
- W3169039835 modified "2023-10-16" @default.
- W3169039835 title "Distributional Statistics of Municipal Water Use During Cape Town's Drought: Implications for Affordability, Conservation, and Tariffs" @default.
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- W3169039835 doi "https://doi.org/10.1029/2020wr028219" @default.
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