WWRC 85-21
Design Information for Evaporation Ponds in Wyoming
Abstract
This publication is a summary of a study to develop design information
for disposal of wastewater by evaporation in Wyoming. The specific
objectives of the study were to: (1) determine models most suitable to
Wyoming for defining evaporation from water, soil, vegetative, and ice
surfaces, based on current state-of-the-art procedures and available
data, and (2) statistically describe monthly, seasonal and/or yearly
variations in evaporation through frequency distributions as well as
predict expected average annual evaporation losses. A more detailed
presentation of the results of the study are available in the final
report (Pochop, et at. 1985) of the project submitted to the Wyoming
Water Research Center.
Comparison of equations which estimate evaporation using climatological
data showed that the Kohler-Nordenson-Fox equation provided
monthly and annual evaporation estimates having statistics more closely
resembling those of measured pan data than any of seven other equations
tested. Monthly and annual means, standard deviations, and highest and
lowest evaporation and net evaporation values have been calculated for
seven Wyoming stations.
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