Study on the performance of rainwater harvesting system and the net zero water in a university lecture building

In this study, the actual water use situation for eight years, performance of rainwater utilization and the possibility of achieving Zero Water in a university lecture building with a rainwater utilization system of 35.4mm rain stock capacity were investigated. The rainwater utilization rate and rainwater replacement rate in the rainwater harvesting system were 71% and 33%, respectively, and about 30% of the annual precipitation could be controlled by outflow. When the use of raw water in the rainwater harvesting system was expanded to drinking and the rainwater collection area was increased by 1.15 times, Zero Water was achieved. © 2020 Architectural Institute of Japan. All rights reserved.