Beyond ‘Day Zero’: insights and lessons from Cape Town (South Africa)

Au-delà du ‘Jour Zéro’: observations et enseignements de la ville du Cap (Afrique du sud)

Más allá del ‘Día Cero’: reflexiones y lecciones de Ciudad del Cabo (Sudáfrica)

超越“零日”:来自开普敦(南非)的见解和教训

Além do ‘Dia Zero’: percepções e lições da Cidade do Cabo (África do Sul)

Abstract

Acute water security vulnerability at regional to local scales is becoming increasingly apparent. In 2017, officials in Cape Town, South Africa, designated the term “Day Zero” to demark an exact time when the city’s taps would be switched off due to critically low reservoir levels. Beyond Day Zero, residents would need to converge at communal water collection points to access a 25-L daily ration of water. The particulars of the crisis and stakeholder responses prove informative to other cities.

Résumé

Une vulnérabilité aigue de la sécurité de l’approvisionnement en eau devient de plus en plus apparente aux échelles régionales et locales. En 2017, les responsables de la ville du Cap, Afrique du sud, ont utilisé le terme “Jour Zéro” pour définir un temps précis à partir duquel les robinets de la ville seront fermés à cause de niveaux critiquement bas atteints par les réservoirs. Au-delà du “Jour Zéro”, les habitants devraient se diriger vers des points de collecte municipaux pour accéder à une ration d’eau quotidienne de 25 L. Les détails de cette crise et les réponses des parties prenantes s’avèrent instructives pour d’autres villes.

Resumen

La vulnerabilidad aguda de la seguridad del agua a escala regional y local es cada vez más evidente. En 2017, los funcionarios de Ciudad del Cabo, Sudáfrica, designaron el término “Día Cero” para demarcar una hora exacta en la que los grifos de la ciudad se apagarían debido a los niveles críticamente bajos de los embalses. Más allá del Día Cero, los residentes tendrían que converger en puntos comunales de recolección de agua para tener acceso a una ración diaria de 25 L de agua. Los detalles de las crisis y las respuestas de las partes interesadas son informativos para otras ciudades.

摘要

区域到局部尺度的水安全严重脆弱性正变得越来越明显。2017年,南非开普敦的官员定义了“零日”这一术语,该术语表示由于水库水位严重下降而关闭城市水龙头的确切时间。超越零日,居民需要在公共集水处才能获得每日25升的水。危机和利益相关者反应的细节可为其他城市提供信息.

Resumo

A vulnerabilidade aguda da segurança dos recursos hídricos às escalas regionais e locais está cada vez mais aparente. Em 2017, oficiais na Cidade do Cabo, África do Sul, designaram o termo “Dia Zero” para demarcar a data exata em que as torneiras da cidade seriam desligadas devido a níveis criticamente baixos nas barragens. Apos o ‘Dia Zero’, residentes teriam que se deslocar a pontos de coleta comunais para aceder a uma provisão diária de 25 L de água. Os detalhes da crise e as respostas de todos os intervenientes são informativas para outras cidades.

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Acknowledgements

The authors are grateful to the associate editor and the editorial team at Hydrogeology Journal.

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Correspondence to G. Thomas LaVanchy.

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LaVanchy, G.T., Kerwin, M.W. & Adamson, J.K. Beyond ‘Day Zero’: insights and lessons from Cape Town (South Africa). Hydrogeol J 27, 1537–1540 (2019). https://doi.org/10.1007/s10040-019-01979-0

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Keywords

  • Groundwater development
  • Water security
  • South Africa