A Critical Evaluation of the Water Supply and Stormwater Management Performance of Retrofittable Domestic Rainwater Harvesting Systems
Open Access
- 21 April 2020
- Vol. 12 (4), 1184
- https://doi.org/10.3390/w12041184
Abstract
Rainwater harvesting systems are often used as both an alternative water source and a stormwater management tool. Many studies have focused on the water-saving potential of these systems, but research into aspects that impact stormwater retention—such as demand patterns and climate change—is lacking. This paper investigates the short-term impact of demand on both water supply and stormwater management and examines future and potential performance over a longer time scale using climate change projections. To achieve this, data was collected from domestic rainwater harvesting systems in Broadhempston, UK, and used to create a yield-after-spillage model. The validation process showed that using constant demand as opposed to monitored data had little impact on accuracy. With regards to stormwater management, it was found that monitored households did not use all the non-potable available water, and that increasing their demand for this was the most effective way of increasing retention capacity based on the modelling study completed. Installing passive or active runoff control did not markedly improve performance. Passive systems reduced the outflow to greenfield runoff for the longest time, whereas active systems increased the outflow to a level substantially above roof runoff in the 30 largest events.Funding Information
- Engineering and Physical Sciences Research Council (EP/N010124/1)
This publication has 14 references indexed in Scilit:
- Rainwater harvesting for urban flood management – An integrated modelling frameworkWater Research, 2019
- Effectiveness of Rainwater Harvesting Systems for Flood Reduction in Residential Urban AreasWater, 2019
- Achieving Urban Flood Resilience in an Uncertain FutureWater, 2019
- Performance of Two Advanced Rainwater Harvesting Systems in Washington DCWater, 2018
- Improving the Multi-Objective Performance of Rainwater Harvesting Systems Using Real-Time Control TechnologyWater, 2018
- Urban rainwater harvesting systems: Research, implementation and future perspectivesWater Research, 2017
- Performance of a large building rainwater harvesting systemWater Research, 2012
- Whole life cost performance of domestic rainwater harvesting systems in the United KingdomWater and Environment Journal, 2011
- Opportunities in rainwater harvestingDesalination, 2009
- Roof rainwater harvesting systems for household water supply in JordanDesalination, 2009