Wednesday, March 31, 2021

Update on water harvesting question about Taiwan

A quick post to mention that I received a reply from the Water Resources Agency, Ministry of Economic Affairs, that indicated that they have been doing cloud seeding for the past 10 years. They referred me to this explanation of cloud seeding. They didn't say much about atmospheric water harvesting, which suggests that they are not doing anything presently in that direction.

I also came across a recent article in Nano Energy on "Solar-powered nanostructured biopolymer hygroscopic aerogels for atmospheric water harvesting." One of the authors is a professor at National Tsinghua University in Taiwan, so I wrote to him to ask if he knew of anyone in Taiwan working on practical applications of atmospheric water harvesting. I'll update when I hear back.

Considering the recent reports of heavy fog in western Taiwan, atmospheric water harvesting sounds like an ideal approach to Taiwan's drought conditions.

Another source on atmospheric water harvesting:

  • "Fog‐to‐Water for Water Scarcity in Climate‐Change Hazards Hotspots: Pilot Study in Southeast Asia" by Zaitizila Ismail and Yun Ii Go, Global Challenges (2021). 
    Abstract: "Water is indispensable for human survival. Freshwater scarcity and unsustainable water are the main growing concerns in the world. It is estimated that about 800 million people worldwide do not have basic access to drinking water and about 2.2 billion people do not have access to safe water supply. Southeast Asia is most likely to experience water scarcity and water demand as a result of climate change. Climate change and the increasing water demand that eventually contribute to water scarcity are focused upon here. For Southeast Asia to adapt to the adverse consequences of global climate change and the growing concern of environmental water demand, fog water harvesting is considered as the most promising method to overcome water scarcity or drought. Fog water collection technique is a passive, low maintenance, and sustainable option that can supply fresh drinking water to communities where fog is a common phenomenon. Fog water harvesting system involves the use of mesh nets to collect water as fog passes through them. Only minimal cost is required for the operation and maintenance. In conclusion, fog water harvesting seems to be a promising method that can be implemented to overcome water scarcity and water demand in Southeast Asia."

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