Minimizing Losses from Evaporation using Floating Cover Systems

Water is the world’s most precious natural resource without it life as we know it would cease to exist. In areas where there is a large amount of water loss due to arid weather conditions, there is a real need to protect the existing water supply to ensure survival. There is a myriad of water conservation methods available out there however, the best solution for open ponds, lakes and tanks is through the use of floating covers. Here is how.

How it Works

Floating covers are basically geomembranes created from sturdy plastic geotextile materials. As the name suggests, floating cover systems float on the surface of the water and therefore prevents evaporation from occurring by stopping dry air from getting into contact with the pond, reservoir or open tank system.

Floating covers also reflect a part of the incoming solar radiation and act as a barrier to the passage of vapor.  Moreover, floating pond covers can also stop evaporation from wind and is therefore considered an effective means of water conservation in open systems like ponds etc.

Many floating cover systems may be made up using black or white reinforced polyethylene with black on one side and white on the other. White floating covers are effective in the summer months or in areas like hot desert climates. It is effective because it keeps the temperature down and minimizes radiation by reflecting sunlight as opposed to letting it be absorbed.

In an open water setting such as ponds, storage tanks or irrigation water sources, further evaporation can be reduced depending on the kind of material used. The system works best if the material is made with a low transmission ratio, as well as with high reflection and absorption ratios.

Odor Reduction

Aside from preventing evaporation, floating cover systems also reduce gas emissions from lagoon systems which in effect reduces odor emissions that can be harmful to both animals and plants.

Floating covers are an effective means of conserving water in an open water setting especially in climates that are drought-ridden. It is important therefore to select a system that is best suited for the environment for which it will be used to achieve maximum effect.