Sustainability in the urban water cycle in sustainable cities

Lezcano, Roberto Alonso González; Fernández, Eduardo José López; Moyano, David Baeza; Contreras, Gastón Sanglier

doi:10.12988/ces.2021.91637

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…There are challenges in improving the global water cycle (Lall et al, 2008) and individual urban water cycles (Lezcano et al, 2021) by sustainable means, which are made more difficult with growing populations. As discussed above, urban water cycles are different in each city, depending upon local geography, demographics and weather patterns, which will change with global warming.…”

Section: Discussionmentioning

confidence: 99%

“…As water consumption is increasing, water management becomes a major challenge for governments to provide freshwater at minimal cost and minimal energy consumption in a sustainable way, but is made difficult due to the uncertainties created with climate change, growing populations and ageing infrastructure for water supply requiring maintenance or replacement. (Lezcano et al, 2021). Notwithstanding the hyperbole of some billionaire entrepreneurs, the mining of off-the-Earth bodies, such as asteroids and moons, is unlikely to be financially viable nor is there likely to be any benefit to large-scale environmental, social or economic conditions on Earth (Glester, 2018;Zeisl, 2019).…”

Section: Urbanisationmentioning

confidence: 99%

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Groundwater: Sinking Cities, Urbanisation, Global Drying, Population Growth

Pattison,

Cooke

2024

JP&S

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An examination of a few examples of aquifer-use shows the importance and fragility of groundwater, with poor management leading to over-extraction by individuals and authorities producing subsidence – sinking cities. Freshwater is one of our most precious resources and it is rapidly disappearing, leading to global drying. At the same time, the global and urban populations are increasing, with civil unrest increasing due, in part, to freshwater shortages. The increasing global population and global urbanisation are driving an increase in water use, restriction of aquifer recharge and increased aquifer pollution. It is argued that urban population growth with attendant increased water use, combined with climate change and poor management, is significant in water stress. Particular attention must be paid to the effect of rising populations on local water resources, especially groundwater, and the knock-on effect on urban sustainability.

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Section: Discussionmentioning

confidence: 99%

Section: Urbanisationmentioning

confidence: 99%

Groundwater: Sinking Cities, Urbanisation, Global Drying, Population Growth

Pattison,

Cooke

2024

JP&S

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“…Water is a finite resource and rainfall remains the origin of all water sources. It is serving as the critical link between the climate system, human society and the environment towards achieving sustainable development [1], [2] and making sustainable cities [3]. The world is now more than half urban [4].…”

Section: Introductionmentioning

confidence: 99%

Sustainability of rainwater management and land-use compliance – a case of greater Dhaka

Huq¹,

Rahman²

2022

IJLERA

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Land-use change due to urbanization in the capital city Dhaka has resulted high population density, reduced green space, uneven rainfall distribution, increased runoff, reduced recharge, and water stress with an imbalance in the water cycle with quality and quantity of groundwater (GW). Acute reliance on GW for water demand management in Dhaka is yet to be complemented by rainwater despite high average annual rainfall and legal compliance for its use. The mandated rainwater harvesting (RWH) and GW recharge provisions can be easily integrated in greater Dhaka's new urbanization having land occupancy 300 m 2 and above. This study identifies the sustainability issues of rainwater management with a case study area in greater Dhaka applying GIS and using land-use compliance tools i.e., FAR (Floor Area Ratio) and MGC (Maximum Ground Coverage).The proposed land-use change explicates the possibility of 50% runoff reduction through an implementable rainwater management option with RWH from roof catchment and GW recharge from unpaved area. The potable and non-potable water saving efficiency reduces significantly if the urban growth is planned with higher FAR. Overall sustainability of rainwater management signifies a lower FAR 1 to 1.5 for greater Dhaka's urban growth and enforcement of decentralized rainwater management compliance.

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