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<br />soil depth and stoniness, soil texture. water-table depth. and <br />soil chemistry will be determined at each macroplot. <br /> <br />Available streamflow and snow-course records will be studied <br />to determine the relationship between snowpack and runoff in <br />selected drainages. <br /> <br />The effects of direction of exposure, seasonal temperature, and <br />water content of snowpack on date of pack melt will be evaluated <br />over the entire period of the study. currently planned for <br />3-1/2 years. <br /> <br />In addition, the feasibility of using satellite data and/or <br />occasional aerial survey check flights for establishing char- <br />acteristics of snow cover retreat will be investigated. Silver, <br />a principal ingredient in one seeding agent. will be monitored <br />preferentially using methods that optimize sensitivity to <br />accumulation. <br /> <br />Based on the results of the analysis, recommendations will be <br />developed for monitoring procedures applicable to long-ter~ <br />cloud seeding research in the Upper Colorado River Basin. with <br />particular emphasis on the Uinta ~ountains. <br /> <br />1.3.3. Sierra Ecology Project. - In conjunction with the <br />Sierra Cooperative Pilot Project (discussed in para. 1.4.1.). <br />Project Sk}~ater in 1975 entered into a cooperative agreement <br />with the U.S. Forest Service to conduct the Sierra Ecology <br />Project. The project. currently planned to be completed in <br />1985, is set in and adjoining California's American River Basin. <br />Its purpose is to assess the effects of additional snow and <br />meltwater on the high country forest ecosystem in the Sierra <br />Nevada. <br /> <br />Initial project objectives included the convening of four work <br />groups to evaluate the state-of-the-art knowledge in their <br />respective fields of expertise so far as the effects of snow <br />augmentation are concerned. In addition, the needs for addi- <br />tional research, monitoring programs, and criteria for monitor- <br />ing results of the planned pilot project will be evaluated. <br /> <br />The work groups are studying the expected effect of snow aug- <br />mentation upon: (1) disease and insect outbreaks and tree <br />mortality or tree growth; (2) deer migration. browse dynamics, <br />and winter-summer ranges; (3) plant growth and succession and <br />rare and endangered plants; and (4) stream and lake biota. <br /> <br />1-18 <br />