Chemical additive for water vapor evaporation arrester

Which is the best chemical (or mineral) additive for reducing the water evaporation in adverse climatic condition?

Thank you!

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6 Answers

1. Evaporation can be reduced by either providing some sort of a barrier between the water and the air or by somehow slowing the movement of the air near the water surface. Planting a wind-break of trees and shrubs around the dam will help to some extent

    

   1. By additive.
   2. By Keeping Free Water Surface Area Minimum: Reservoirs and lakes are the water bodies with large surface area.
   3. By Spreading Surface Films on the Reservoirs and Lakes
   4. By Providing Mulch on the Land Surfaces:

    

   Calcium hydroxide (hydrated Lime Ca(OH2)), food grade stearyl alcohol (C18H37OH, commonly referred to as octadecanol) and cetyl alcohol (C16H33OH, commonly referred to as hexadecanol) that can reduce surface water evaporation by 20-50% without negative environmental impacts. It is an odourless white powder that automatically and quickly spreads into an invisible, molecule-thin film over the surface of water. It is an internationally patented

    

   Shade balls are small plastic spheres floated on top of a reservoir for environmental reasons, including to slow evaporation and prevent sunlight from causing reactions among chemical compounds present in the water.

    

   1 Comment

   1. Thank you Mr Babu for your comments. Can Octadecanol and hexadecanol be available in liquid form?

2. Thank you for various responses. I am looking for something in liquid form to add in the concrete.

3. Good day Joshi,

   The most common used one is white shade balls, as compare with black ones. 

    

   Thanks

   1 Comment

   1. Thank you Phetla. I am looking for something in liquid form to add in the concrete.

4. You didn't say what type of body of water this is? Regarding "shade Balls" white balls works better than black balls which enhance solar thermal heating and contribute to evaporation. "shade balls" are mostly used to keep water fowl out of reservoirs eliminating droppings that could contaminate the water with avian-borne pathogens. If it is a reservoir then surface agitation to change the Richardson's Index would help retard evaporation. Eliminating the thermal stratification (thermocline) is also a good technique, i.e. bringing colder hypolimnion water to the surface to lower temperature and make it more uniform aids in retarding evaporation while increasing the overall water quality.

   1 Comment

   1. Thank you John. I am looking for something in liquid form to add in the concrete.

5. Some municipalities use "shade balls" on reservoirs, which are able to reduce evaporation significantly.  I would avoid using chemicals. If you do a google search there is a fair amount of information on this and other techniques.

   1 Comment

   1. Thank you Ian. I am looking for something in liquid form to add in the concrete.

6. If the question is how do I stop deposits forming when water evaporates - then https://www.envirofluid.com/shop/industrial-cleaning-degreasing/triple7-colloidal-concentrate will prevent algae, slime and scale buildup.

   2 Comments

   1. Thank you Ben. I am looking for something in liquid form to add in the concrete.

   2. Thank you for response but I am looking for water vapor retarder.