Nnadi Ernest O, Newman Alan P, Coupe Stephen J, Mbanaso Fredrick U
SUDS Applied Research Group, Coventry University, Priory Street, Coventry CV1 5FB, United Kingdom.
Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, United Kingdom.
J Environ Manage. 2015 Jan 1;147:246-56. doi: 10.1016/j.jenvman.2014.08.020. Epub 2014 Sep 23.
Most available water resources in the world are used for agricultural irrigation. Whilst this level of water use is expected to increase due to rising world population and land use, available water resources are expected to become limited due to climate change and uneven rainfall distribution. Recycled stormwater has the potential to be used as an alternative source of irrigation water and part of sustainable water management strategy. This paper reports on a study to investigate whether a sustainable urban drainage system (SUDS) technique, known as the pervious pavements system (PPS) has the capability to recycle water that meets irrigation water quality standard. Furthermore, the experiment provided information on the impact of hydrocarbon (which was applied to simulate oil dripping from parked vehicles onto PPS), leaching of nutrients from different layers of the PPS and effects of nutrients (applied to enhance bioremediation) on the stormwater recycling efficiency of the PPS. A weekly dose of 6.23 × 10(-3) L of lubricating oil and single dose of 17.06 g of polymer coated controlled-release fertilizer granules were applied to the series of 710 mm × 360 mm model pervious pavement structure except the controls. Rainfall intensity of 7.4 mm/h was applied to the test models at the rate of 3 events per week. Analysis of the recycled water showed that PPS has the capability to recycle stormwater to a quality that meets the chemical standards for use in agricultural irrigation irrespective of the type of sub-base used. There is a potential benefit of nutrient availability in recycled water for plants, but care should be taken not to dispose of this water in natural water courses as it might result in eutrophication problems.
世界上大部分可用水资源都用于农业灌溉。鉴于世界人口增长和土地利用增加，预计这一用水水平还会上升，而由于气候变化和降雨分布不均，可用水资源预计将变得有限。再生雨水有潜力用作灌溉用水的替代来源，也是可持续水资源管理战略的一部分。本文报告了一项研究，旨在调查一种名为透水路面系统（PPS）的可持续城市排水系统（SUDS）技术是否有能力回收符合灌溉水质标准的水。此外，该实验还提供了有关碳氢化合物（用于模拟停放车辆滴落在PPS上的油）的影响、PPS不同层中养分的淋溶以及养分（用于增强生物修复）对PPS雨水回收效率的影响的信息。除对照组外，向一系列710毫米×360毫米的模型透水路面结构中每周施加6.23×10⁻³升润滑油，并单次施加17.06克聚合物包膜控释肥料颗粒。以每周3次的频率向测试模型施加7.4毫米/小时的降雨强度。对再生水的分析表明，无论使用何种基层类型，PPS都有能力将雨水回收到符合农业灌溉化学标准的质量。再生水中的养分对植物有潜在益处，但应注意不要将这种水排放到天然水道中，因为这可能会导致富营养化问题。
