Abstract Four research projects were funded under the FY 1986 program which included:
A field study on the movement of organic contaminants through groundwater to surface streams created by a wood-treating facility and an oil refinery's NPDES discharge indicated that oily seeps or surface discharge can occur into the surface stream and adversely affect the biological activity in the stream. Use of EPA ambient toxicity tests were found to be sensitive enough to detect migration of contaminated surface or ground water into surface streams.
A recreational based valuation method was developed and tested to estimate the effects of change in water quality due to eutrophication of a reservoir on recreational benefits and uses. The method used sampled recreationalists on direct and indirect contact at the reservoir site with a follow-up questionnaire. The data indicated a change in some users recreational activities due to eutrophication.
A field study is being conducted to investigate stream-aquifer interaction phenomena in fracture permeable Paleozolc rock outcrops. Using streamflow discharge measurements above and below the fracture permeable rock outcrop areas along with well level measurements, quantification of recharge due to streamflow during the entire year has shown that the groundwater system is being recharged directly from the stream at different rates during different times of the year.
A study was undertaken to investigate the applicability of crop yield-water use models on crops (winter wheat) grown in high altitude locations (Wyoming). The FAO yield-water use model by Doorenbos and Kassam was found to predict actual yield of winter wheat as a function of maximum yield, a crop response factor and the evapotranspiration ratio with fairly good reliability considering that agronomic and soil unknowns were not present in the prediction.
Information transfer was done principally through a symposium proceedings on Wyoming water problems, extension activities, mailings on available publications, through a newsletter, and participation at several meetings held by groups in the State of Wyoming on water issues.
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