• Environmental planning for an Alaskan water-oriented recreational area

      LaPerriere, Jacqueline Doyle (University of Alaska, Institute of Water Resources, 1978-06)
      This research focused initially on delineation of the proper procedures to be applied when the state of Alaska, through the appropriate agencies, selects and develops water-based recreation areas. The Nancy Lakes recreational area was selected as a case study for testing these procedures. This area is located approximately 106 km (66 road miles) northwest of Anchorage along the Parks Highway (61°N,150°W). When the research was begun in July of 1973, this area was determined to be important to the future recreational needs of the residents of the growing municipality of Anchorage as well as to travelers between Fairbanks and Anchorage along the newly opened highway. Today, this area is even more important as the new capital of the state of Alaska will be located approximately 6 km (4 miles) east of Nancy Lakes. In the summer of 1974, difficulties arose concerning the objectives of the project and the reports to be generated. Therefore, a decision was made to terminate the research at Nancy Lakes. A partial completion report was compiled concerning the work completed to September 1, 1974. This report was distributed to cooperators at the State of Alaska, Department of Natural Resources, Division of Parks; the Sport Fish Division of Alaska Department of Fish and Game, Palmer; and to the Office of Water Resources Research, the predecessor of the Office of Water Research and Technology. The research has continued, focusing on the Tanana Lakes near Fairbanks, Alaska, (64°N,146°N) with the cooperation of the Sport Fish Division of the Alaska Department of Fish and Game, Fairbanks. These lakes, located within 160 km (100 miles) of Fairbanks, are important to the residents of Fairbanks, as well as to tourists driving to Fairbanks from the 48 continguous states. Many Fairbanks residents have cottages at one of the three largest of these, Harding, Birch, and Quartz Lakes. Several youth groups have summer camps on these lakes; the U. S. Army and the U. S. Air Force are currently sharing an extensive recreation facility at Birch Lake; and the state park at Harding Lake is one of the state's most utilized campgrounds. The research on this lake group has focused on the variation in productivity between these lakes due to differences in lake morphometry and watershed characteristics, with some attempt to assess recreational impacts on their water quality.
    • Nutrient chemistry of a large, deep lake in subarctic Alaska

      LaPerriere, J. D.; Tilsworth, T.; Casper, L. A. (University of Alaska, Institute of Water Resources, 1977-08)
      The primary objective of this project was to assess the state of the water quality of Harding Lake, and to attempt to predict the effects of future development within its watershed. Since the major effect of degradation of water quality due to human activity is the promotion of nuisance growths of plants, the major emphasis was placed on measurements of plant growth and concentrations of the major nutrients they require. Planktonic algal growth was found to be low, below 95.6 gm/m2/year, and the growth of submerged rooted plants was found to be relatively less important at approximately 1.35 gm/m2/year. Measurements of the growth of attached algae were not conducted, therefore the relative importance of their growth is currently unknown. A model for predicting the effect of future real estate development in the watershed was modified and applied to this lake. This model adequately describes current water quality conditions, and is assumed to have some predictive ability, but several cautions concerning application of this model to Harding Lake are discussed. A secondary objective was to study the thermal regime of a deep subarctic lake. Intensive water temperature measurements were made throughout one year and less intensive measurements were conducted during two additional years. The possibility that this lake may occasionally stratify thermally under the ice and not mix completely in the spring was discovered. The implications of this possibility are discussed for management of subarctic lakes. Hydrologic and energy budgets of this lake are attempted; the annual heat budget is estimated at 1.96 x 104 ± 1.7 x 103 cal/cm2. The results of a study of domestic water supply and waste disposal alternatives in the watershed, and the potential for enteric bacterial contamination of the lake water are presented. Limited work on the zooplankton, fishes, and benthic macroinvertebrates of this lake is also presented.