Abstract
The use of evapotranspiration (ET) covers for final closure of landfills has seen increased use over the last several years. This increase is in part due to economics and public acceptance. The ideal climatic regions for the use of ET covers are arid and semi-arid regions. To date the use of ET covers has not been thoroughly investigated in cold regions. The purpose of this paper is to investigate the use of ET covers in Alaska. Water and energy balances were calculated for hypothetical ET covers using daily weather data during the period 1986 to 1999 for the three population centers in Alaska Juneau, Anchorage, and Fairbanks. The SHAW (Simultaneous Heat and Water) model was used to make these calculations. Results from these simulations show that an ET cover would most likely be effective if used in regions with climatic conditions similar to Fairbanks and possibly Anchorage depending upon the type of soil selected. According to this analysis, these results are due to relatively cold and dry winters in these regions as well as the period of maximum evapotranspiration roughly corresponding with the period of maximum precipitation.
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