Abstract Five projects were funded under the FY 1984 program which covered topic areas in water quality problems in organic contaminant transport between groundwater and surface waters, prediction of trout density in montane areas, prediction of runoff from snowcover in montane areas using satellite imagery for water management, soil compaction in furrow irrigation to improve irrigation efficiency for agriculture and estimation of secondary costs associated with water development. Information transfer was done principally through a symposium 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.
A field study on the movement of organic contaminants through the groundwater to surface streams from a wood-treating facility indicated that oily seeps occur into the surface stream. Soil column experiments have shown that organic contaminants as emulsions move faster through a soil column than a dissolved single compound.
Multiple regression models (three) were developed to predict trout abundance in high mountain streams in Wyoming using geomorphic and instream habitat parameters. Correlations between predicted and actual trout abundance for the three models developed were 0.80, 0.75 and 0.32.
Correlations between snowcover and runoff using satellite imagery for drainage basins in Wyoming were developed to provide a basis for estimating expected runoff from snowcover using the latest satellite data available each year. Dates for beginning, peak and end of spring snowmelt can be predicted.
A field evaluation of compaction effort for different furrow shapes for hydraulic and infiltration characteristics to improve irrigation efficiency was performed. Furrow shape and compactive effort are both important factors to improved irrigation efficiency and traditional methods of analyzing furrow irrigation were found unsatisfactory because of furrow shape.
Two proposed water development projects in Wyoming were used to identify and quantify secondary costs and benefits of economic, demographic and public sector impacts through the use of a computerized impact assessment model. Both projects produced a net public sector surplus at the local level, but deficits for the State overall.
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