Rainwater Harvesting for Water Security in Campus (case study Engineering Faculty in University of Pancasila)

Abstract

Global climate change is a worldwide issue affecting rain and groundwater supplies. To realize the SDGs’ 6th goal regarding clean water and proper sanitation, Rainwater Harvesting (RWH) is one solution for pure water requirements and useless groundwater. RWH, which is equipped with infiltration wells, can overcome water scarcity during the dry season and reduce flooding in the rainy season. This research was conducted to harvest rainwater that falls on the roof into the reservoir to the ground, so it is necessary to calculate the rainwater availability and water demand to design RWH building plan. This research was conducted at the Faculty of Engineering, Pancasila University, which uses groundwater for essential water requirements. Two RWH reservoirs are planned in different locations, with the dimensions of the RWH reservoir are 4 m (length) x 3.5 m (width) x 3 m (height). Based on the flood discharge from the roof of 84 m3, the amount of water needed is 19.4 m3. For that, it is necessary to be equipped with 4 infiltration wells with a diameter of about 1.5 m and a height of 3 m to store groundwater around 6.402 m3. RWH application can also be applied to campus that use groundwater to reduce groundwater use.