Management and Valuation of Rainwater by Alternative Techniques, Zone 1 of the Campus of the University Hassan First of Settat

Abstract

The aim of our research is to mobilize a new system for managing and reusing rainwater, using alternative techniques to help save water and secure the supply of drinking water, without wasting it. To this end, our study focused on rainwater collection, storage, treatment and distribution to the various users, in compliance with current standards for reuse, based on these alternative techniques and using EPA SWMM5 modeling software. A case study was carried out on Zone 1 of the Settat university campus, covering an area of 6.56 Ha, with an intense rainfall of 42 mm/h for 30 min and an average annual rainfall of 372 mm/year. The result obtained is very significant, with a yield of up to 90%: i.e. rainwater collection of 334. 8 L/m²/year, i.e. 21 963 m³/year, stored at rainfall in tanks with a total capacity of 1 336.20 m³, to be reused for flushing toilets, irrigating gardens and green spaces around the study site, thus saving on drinking water consumption, a significant gain and also savings on investment and on the operation of on-site and off-site rainwater works. In conclusion, within a limited surface area, the use of alternative techniques for managing and reusing rainwater leads to a saving of over 50% in drinking water, and it is hoped that this will provide solutions that will enable man, farmland and industry alike to alleviate water stress, cope with the shortage and scarcity of water resources, secure and save drinking water and combat wastage in the future.