free-water surface

free-water surface

[′frē ‚wōd·ər ¦sər·fəs]
(building construction)
References in periodicals archive ?
For saturated soils, the evaporation may be expected to be similar to that from an open free-water surface. As the water table drops below the soil surface, the evaporation rate will decrease greatly.
4.1 Compute the daily evaporation from a free-water surface if the wind speed is 4 m/s at 0.15 m height, average water and air temperatures are both 25[degrees]C, and the average relative humidity of the air is 50 percent.
For a detailed analysis of evaporation from free-water surfaces, see Jones (1992).