Repository logo

Evaporation of water as related to wind barriers




Verma, Shashi B., author
Cermak, J. E. (Jack E.), author
Colorado State University, publisher

Journal Title

Journal ISSN

Volume Title


Local evaporation rates were measured from strips of saturated surfaces imbedded in wavy surfaces. Mean water vapor concentrations and mean velocity distributions were also measured over the wavy boundary. In the region far downstream of the leading wave, where the equilibrium boundary layer conditions were achieved, the average mass transfer coefficient was found to be a simple power function of the surface Reynolds number. Based on this result, the mass transfer data from this study correlated well with the mass transfer data from surfaces of various other geometries, e.g., evaporation data from water waves, evaporation data from flat plate and sublimation data from surfaces roughened with irregular pyramids and spanwise humps. Turbulence intensities and Reynolds stresses were measured over the wavy surfaces. Measurements of wall pressures and wall heat flux distributions were obtained for a series of points along the surface. Wind reduction factors were determined in the space between successive barriers. Measurements of turbulent shear stresses and mean velocity distributions along with the heat transfer rates in case of flow over equally spaced barriers has yielded valuable basic information concerning the boundary-layer flow over rough surfaces.


June 30, 1971.
Includes bibliographical references (pages 95-103).
The work upon which this report is based was supported in part by funds provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the Water Resources Research Act of 1964, Public Law 88-379, Agreement Number 14-01-0001-1436 (July 1, 1967 to June 30, 1971).
Circulating copy deaccessioned 2020.

Rights Access


Windbreaks, shelterbelts, etc.
Soil moisture


Associated Publications