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Abstract The purpose of this report is to provide estimates of long-term residential water requirements for the Platte and Green River Basins of Wyoming. Estimates of residential water use are shown by five-year intervals for counties and for the entire basin areas - specified in gallons per capita per day, thousands of gallons per day, and millions of gallons per year. The estimates are preliminary in the sense that additional research now underway may provide additional evidence that will serve to modify the initial estimates shown here.
The projections are derived from mathematical estimating equations in which temperature, water cost, and time are used as variables for estimation of per capita water consumption. Water consumption data were obtained from a survey of six communities in the Platte River Basin (comprising about two-thirds of the basin population), and from Rock Springs and Green River in the Green River Basin. Population estimates presented in Population Trends for the Platte and Green River Basins in Wyoming; 1890-2010, Water Resource Series Number 4, provided the basis for obtaining total residential water requirements for the forecast period.
For the Platte River Basin, total residential water consumption is expected to increase from 8.3 million gallons in 1965, or a per capita consumption rate of 128.5 gallons per day, to 38.2 million gallons per year and a per capita daily consumption rate of 308 gallons by the year 2010. While population in the Platte River Basin is expected to nearly double during this time period, residential water consumption is expected to increase between four and five times. For the Green River Basin, residential water consumption is expected to increase from 2 million gallons per year in 1965 to 5.4 million gallons per year in 2010. Thus, residential use of water in the Green River Basil will increase about 2.7 times during the period, while population is expected to increase only by one-third.
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