Seoul National University
Dr. Mooyoung Han, is a Professor Emeritus at Seoul National University. He earned his Bachelor's and Master's degrees from Seoul National University and completed his Ph.D. at the University of Texas in 1989. He serves as the chairman of the International Water Association (IWA) 's specialist group dedicated to Rainwater Harvesting and Management (RWHM). He has introduced the concept
of CBRD (Community-Based Rainwater for Drinking) systems. These systems ensure the provision of water that meets national standards by employing a multi-barrier concept and nature-based solutions. Particularly noteworthy is his "Rain School Initiative," has gained recognition within the UN Water Action agenda, and an international rain school network is being established through the utilization of digital technology and active student involvement.