The Challenge of Water Scarcity in the Atacama Desert
The Atacama Desert in Chile is one of the driest places on Earth. Some areas receive rain only a few times in a century, while others have never recorded rain. In many rural communities, local governments have to transport water from other parts of the country or extract it from deep underground wells. However, in more remote settlements, these solutions are still not economical or reliable.
To address the issue, residents and researchers have been looking for more innovative methods to obtain water from the environment. Some have started using the fog that frequently covers northern Chile. Cold air currents from the Pacific cool into low-lying cloud cover that blows inland, being interrupted by the coastal mountains and settling at ground level. With the right approach, groups have found ways to "capture" or "harvest" the fog, turning it into usable fresh water.
The Science Behind Fog Harvesting
In a very simple way, we have to understand that clouds are made up of water droplets," said Camilo del Río, director of the Atacama Desert Center at the Catholic University of Chile, to Mongabay. "They are already formed, already condensed. So, whenever a cloud is transported by the wind and comes into contact with the Earth's surface, what is touching the surface are thousands and thousands of liters [of water]."
Fog harvesting is based on the principle that clouds are a source of water that can be captured and used. This is done through screens or nets that are placed in areas where fog is common, allowing the water droplets to be collected and stored.
Impact and Prospects
Local groups have found ways to harvest enough fog to supplement drinking water and strengthen agricultural projects. However, many challenges with the strategy still remain. Researchers want to harvest fog more efficiently and on a larger scale, one day convincing local officials to adopt this practice as a solution to water scarcity.
Fog harvesting has the potential to be an innovative and sustainable solution to water scarcity in the Atacama Desert. However, more research and development are needed to make this practice more efficient and accessible.
Broader Context
Water scarcity is a global problem that affects many arid and semi-arid regions. Fog harvesting is just one of many innovative solutions being developed to address this issue. Other solutions include desalination, water reuse, and water conservation.
However, fog harvesting has some advantages over other solutions. It is a renewable and clean source of water, and it does not require the use of energy or chemicals. Additionally, fog harvesting can be done on a small scale, making it an accessible solution for rural and isolated communities.
What Happens Next
Researchers and local groups are working to develop fog harvesting as a solution to water scarcity in the Atacama Desert. This includes improving the efficiency of fog harvesting, increasing the scale of production, and raising awareness among local officials about the benefits of this practice.
Furthermore, fog harvesting can be a solution for other arid and semi-arid regions of the world. With more research and development, this practice can be adapted to meet the needs of different regions and communities.
Source / Reference
This article was originally published on Mongabay.