Nurturing the Young –

Innovation for Sustainability

Events and Activities

Utilization of Atmospheric Water Resources: Sky River Concept and Application

Technical Seminar

Utilization of Atmospheric Water Resources: Sky River Concept and Application


Date, Time & Venue

25 November 2020 (Wed), 18:30-20:00, Webinar via Zoom


Programme Highlight

Due to rapid population growth, economic development and climate change, there are severe spatiotemporal variations of water resources in the globe, and our society is facing serious challenges in securing sufficient water. To tackle the water shortage, we need find other water sources. Currently, desalination is one applicable measure to obtain freshwater; however, the cost is high and the location is restricted. Therefore, an effective and possible way is to utilize atmospheric water resources, which are the precipitable water in the atmosphere. With relatively stable temporal and spatial distribution, this part of water resources can be exploited and utilized through artificial precipitation enhancement operations which is also known as cloud seeding. Traditionally, commonly used cloud seeding is chemical material, silver iodide. In this technical seminar, the speaker will introduce the situation of atmospheric water resources (Sky River) and the method that implements low frequency acoustic waves to stimulate and enhance precipitation. Through indoor experimental analysis and a large number of field tests, the effect has been tested. The development and utilization of atmospheric water resources would provide an innovative measure to obtain more freshwater for a certain region. In the presentation, the speaker will also discuss the atmospheric water resources in the Greater Bay Area.



Free of charge



Prof. Ji Chen   Professor of Department of Civil Engineering of HKU


Professor Ji Chen obtained his PhD degree from UIUC, and ME and BE degrees from Tsinghua University, and joined HKU in September 2004. His research interests lie in water resources, terrestrial hydrologic processes, climate change, urbanization, natural hazards and remote sensing. He has graduated ten PhD students and is an author of more than 60 research journal papers. Prof. Chen is an associate editor of three international research journals: Journal of Hydrology, Journal of Hydro-Environment Research, and Stochastic Environmental Research and Risk Assessment. He was the president the Hydrological Sciences Section in Asia Oceania Geosciences Society (2018-2020) and is currently the chairman of the International Association for Hydro-Environment Engineering and Research-Hong Kong Chapter (2019-).


Registration & Enquiries

The number of participants is limited to 500 and priority will be given to members of Civil Division. Please complete the on-line registration via zoom at Email registration will not be accepted.


Successful applicants will be informed by email and provided a designated link to the online meeting. For enquiries, please contact Ms. Sarita CHAN via email: