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 2 publications

(1 citation statement)

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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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Section: Introductionmentioning

confidence: 99%