Abstract
Although rainwater harvesting (RWH) schemes have gradually gained more credibility and popularity in recent times, efficient utilisation and larger scale implementation of multi-purpose RWH are still a challenging task. This paper aims to explore the potential of using smart RWH schemes and their impact on the efficiency improvement in integrated urban water systems (UWS). The smart RWH scheme analysed here is capable of proactively controlling the tank water level to ensure sufficient spare storage is maintained at all times that accommodates the runoff from storm events. The multi-purpose RWH tank can mitigate local floods during rainfall events and supply harvested rainwater to non-potable residential water consumption. Optimal design parameters of the smart RWH scheme are also identified to achieve the best operational performance of the UWS. WaterMet2 model is used to assess the performance of the UWS with smart RWH schemes. The efficiency of the proposed methodology is demonstrated through modelling a real case of integrated UWS. The results obtained indicate that utilisation of smart RWH with an optimally sized tank, compared to the corresponding conventional RWH, is able to significantly improve the UWS efficiency in terms of mitigation of local flooding and reliability of water supply from harvested rainwater.
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Part of this work is related to the software tool of WaterMet2 which was developed between 2012 and 2015 in the ‘TRansition to Urban water Services of Tomorrow’ (TRUST) research project funded under the Seventh Framework Programme by the European Commission, which is gratefully acknowledged. Readers interested to use WaterMet2 software tool for research purposes may contact the authors.
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Behzadian, K., Kapelan, Z., Mousavi, S.J. et al. Can smart rainwater harvesting schemes result in the improved performance of integrated urban water systems?. Environ Sci Pollut Res 25, 19271–19282 (2018). https://doi.org/10.1007/s11356-017-0546-5
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DOI: https://doi.org/10.1007/s11356-017-0546-5