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<br />and depth, and bed materials were collected prior to the intens ive sampl ing to <br />aid in the interpretation of ' the modeling analysis. <br /> <br />A model by Bauer and Jenning$ (1975) will be applied to the resultant da- <br />ta from the Intensive data-collection activity. in addition, modeling appli- <br />cations may be attempted utilizing a modified PIONEER-l model developed for <br />the,U.S. Environmental Protection Agency by Battelle Northwest laboratories <br />(1973), which has been adopted by the Colorado Department of Health for appl i- <br />cation in the State. It is further envisioned that comparative modeling runs <br />using the above-mentioned models will Indicate some of the uncertainties in <br />the modeling structure and parameter estimation, as well as some of the prob- <br />lems associated with data collection. <br /> <br />PHASE-I REPORTS <br /> <br />A report will be prepared. which will describe (1) the environmental set- <br />ting in the Yampa River basin, and (2) various alternative proposals for <br />energy-resource development in the basin. The report will document the first <br />project phase by summarizing the environmental setting of the basin and pro- <br />viding information on energy extraction, energy utilization, and the antici-. <br />pated secondary impacts in terms of population growth, employment shifts, and <br />basin economy. A general description of the Phase II assessment approach will <br />be included. The intended aud.ience of the report includes those regional and <br />basin planners and managers working in energy-developed areas who are concern- <br />ed with water-use and environmental impacts. <br /> <br />Two special-topic reports are envisioned for describing in detail the <br />techn i ca 1 aspects of the water-qual i tyi nterpretat ions i nc I uded in work tasks <br />1-0 and I-E. These reports will be completed after the summary report, but <br />study approaches and extracted preliminary results of these two Phase-I inves- <br />tigations will be included in the summary report. <br /> <br />16 <br />