The water should be harvested very early in the morning, before sunrise.
The water produced from rain, fog and dew most likely, if the enviroment is not polluted, will comply with WHO (World Health Organization) recommended guidelines for drinking water. Nevertheless, the probable presence of small amounts of animal and/or vegetal bacteria (e.g., from the excretions of insects drinking the dew water) may require a light antibacterial treatment like boiling or microfiltration. We are currently developing lost-cost water filtering solutions to embed in the Warka towers.
We are experimenting with different types of materials and technologies – from polymeric meshes to natural ones – and measuring the water collection performance of the Warka.
WW is designed for harvesting dew and fog and also for rain collection, providing varying amounts of potable water throughout the year. Water can be taken directly and locally from the environment, without wasting energy in transport. Rainwater and fog will be captured and stored during the meteorological events. Water by condensation will occur more frequently at night when the air temperature goes below the dew point.
The project is still in an exploratory phase, but the aim is to collect an annual average of 50 to 100 litres of potable water a day. The harvested water can be used as drinking water and stored for other purposes like irrigation. We will introduce a water management system that teaches the principles of permaculture and appoint a water manager to administer the water distribution guidelines.