• Factors to Consider in Drafting Standards to Protect Groundwaters in Arizona

      Bennett, Marc M.; Arizona Department of Health Services (Arizona-Nevada Academy of Science, 1980-04-12)
      A summary of factors which need to be addressed when drafting standards to protect groundwater is presented based on research of existing and proposed groundwater quality standards in several states. Options available for each factor are offered as possible choices.
    • Character of Earth Fissure Movement in South-Central Arizona

      Carpenter, M. C.; Boling, J. K, Jr. (Arizona-Nevada Academy of Science, 1980-04-12)
    • Three-Dimensional Velocity Log in Groundwater

      Chagnon, Richard P.; Screens, Johnson; Johnson Screens, UOP (Arizona-Nevada Academy of Science, 1980-04-12)
    • Application of the USLE to Southwestern Rangelands

      Simanton, J. Roger; Osborn, Herbert B.; Renard, Kenneth G.; USDA, Southwest Rangeland Watershed Research Center, Tucson, Arizona (Arizona-Nevada Academy of Science, 1980-04-12)
    • Water Impoundment Applications for SBR/Asphalt Membrane Systems

      Chambers, Carlon C.; Technology Management, Inc., Grand Junction, Colorado (Arizona-Nevada Academy of Science, 1980-04-12)
    • Water Quality Analyses of the Colorado River Corridor of Grand Canyon

      Tunnicliff, Brock; Brickler, Stanley K.; University of Arizona (Arizona-Nevada Academy of Science, 1980-04-12)
      Water quality research of the Colorado River corridor of Grand Canyon examines important relationships between densities of fecal coliform bacteria in surface water and underlying bottom sediments. Surface water sampling alone does not accurately reflect baseline water quality status of natural recreational waters, as sediments often harbor microbial densities in several orders of magnitude of overlying waters. Water-based recreation activities and natural wave and current processes can resuspend sediment and associated microbial populations, including enteric pathogens. Data show significant associations between surface water and bottom sediment microbial populations, demonstrating the importance of a combined sampling approach to water quality analyses.
    • Hydraulic Modeling for Capital Improvements Planning

      Davis, Stephen E.; Tucson Water (Arizona-Nevada Academy of Science, 1980-04-12)
      The Tucson Water Department has developed a long-range water master plan utilizing a computerized hydraulic modeling system from which to determine size and phasing of major water capital improvements. Alternative water sources and amounts were modeled under a fifty-year peak demand condition. Nodal pressure, pipeline headloss, and reservoir drawdown results were evaluated against pre -set standards to determine the optimal solution to the supply- demand balance. A mid-range demand condition for 1990 was modeled subsequent to the modeling of the 2030 planning horizon to incorporate a major domestic water source change. Sizing of new facilities will he based upon the long-range solution. Phasing of capital improvements will he based upon existing system deficiencies, rate and spatial distribution of growth, delivery date of new imported surface supply, and the availability of funds for water project construction.
    • The Northwest Area Water Plan - Tucson, Arizona

      McLean, Thomas M.; Tucson Water (Arizona-Nevada Academy of Science, 1980-04-12)
      In May, 1979, the City of Tucson entered into contractual agreements with three private water companies to ensure 100 year adequacy and to manage scarce water resources within a large area northwest of Tucson. These agreements implemented the Northwest Area Water Plan. The Northwest Area Water Plan provides a mechanism by which local and imported water sources can be cooperatively managed by the City of Tucson and local private water companies within the Northwest Water Service Area. This plan has been developed to complement agreements for water service between the City of Tucson and private water companies and is an integral part of those agreements. The purpose of this plan is to identify those facilities and associated costs which provide, on a regional basis, a permanent, cost-effective water supply to new customers within the Northwest Water Service Area. The basic plan approach is to utilize existing local groundwater to the fullest extent possible while maintaining local water tables at their present levels. This will be accomplished through the planning, design, and construction of an import water supply system to meet the base demands of customers within the Northwest Water Service Area and the conjunctive management of local well capacity and storage reservoirs to meet the variable peak demands and fire flow requirements.
    • Water Harvesting: Soil/Water Impacts of Salt Treatment

      Todd, Albert H.; USDA, Tahoe National Forest, Nevada City, California (Arizona-Nevada Academy of Science, 1980-04-12)
      The responses of mined -land and natural soil materials to additions of various salt solutions in irrigation water from water harvesting were evaluated by an experimental soil column study. A pilot water harvesting agrisystem on the Black Mesa in northeastern Arizona was the source of data and soil materials used in the study. A salt leaching simulation model provided predictions for comparison to the experimental results. In general, Na, Ca, and Mg were all easily leached from both soil materials, with higher concentrations yielded from the minespoil. When sodium was applied in solution, the minespoil accumulated 20% of the amount applied in the upper 10 cm of the soil column, while the natural soil retained 50% in the upper 25 cm. In addition, the natural soil retained 60% of the Ca applied in solution. The simulation model produced good results for Na but only fair prediction of Ca and Mg. A discussion of the experimental conclusions' applicability to field conditions, the difficulties of the salt leaching model, and recommendations for further research is given.
    • Water-Awareness in Tucson, Arizona: A Case Study

      Buckley, Kebba; University of Arizona (Arizona-Nevada Academy of Science, 1980-04-12)
    • Origin, Development, and Chemical Character of a Perched Water Zone, Harquahala Valley, Arizona

      Graf, Charles G.; Arizona Water Commission (Arizona-Nevada Academy of Science, 1980-04-12)
    • A Multi-Objective Approach to River Basin Planning

      Gershon, Mark; McAniff, Richard; Duckstein, Lucien; Department of Systems and Industrial Engineering, University of Arizona, Tucson, Arizona (Arizona-Nevada Academy of Science, 1980-04-12)
    • Computerized Depth Interval Determination of Groundwater Characteristics from Well Driller Logs

      Long, Mike; Erb, Stephen; Arizona Water Commission (Arizona-Nevada Academy of Science, 1980-04-12)
    • Snow Interception as Influenced by Forest Canopy Variables

      Biroudian, Nader; Avery, Charles; School of Forestry, Northern Arizona University (Arizona-Nevada Academy of Science, 1980-04-12)
    • Exploration for Saltwater Supply for Shrimp Aquaculture, Puerto Penasco, Sonora, Mexico

      DeCook, K. J.; Ince, S.; Popkin, B. P.; Schreiber, J. F., Jr.; Sumner, J. S.; Water-Supply Study Team, Water Resources Research Center, University of Arizona, Tucson, Arizona 85721 (Arizona-Nevada Academy of Science, 1980-04-12)
      The University of Arizona's Environmental Research Laboratory, with the Universidad de Sonora, has operated a research station at Puerto Peñasco, on the northeastern Gulf of California, since 1962. Controlled-environment shrimp aquaculture, the Laboratory's most recent research interest, requires a large, dependable supply of filtered, temperate seawater. A University Water-Supply Study Team explored for a supply in an 850-hectare site near the Estero Marua for a proposed ten-hectare shrimp farm. The study included geological, geophysical, and hydrological investigations, and consideration of groundwater, Gulf, estuarine, and combined seawater sources. A thick, fine sand, in the study area, has a very low permeability, contains highly saline water, and could sustain low yielding wells. A thin, coquinoid beachrock, along the Gulf coast near the study area, has a high permeability, contains seawater, and could sustain high yielding wells. Gulf and estuarine water sources have unacceptable temperature ranges, though they could be utilized if mixed with groundwater, stored, and insulated. Recommendations include: drilling, testing, and analysis of coquina; modeling of groundwater heat flow, water-quality effects, and potential well-field designs and impacts for beachrock development; analyzing well design and performance; relaxing temperature and salinity constraints; reusing aquacultural wastewater; and reducing water demand.
    • Groundwater Exploration in Northeastern Arizona Using Landsat Imagery

      Foster, Kennith E.; DeCook, K. James; Office of Arid Lands Studies and Water Resources Research Center, University of Arizona, Tucson, Arizona (Arizona-Nevada Academy of Science, 1980-04-12)
      Demands for electric power generation are rapidly increasing water -supply requirements in northeastern Arizona, where groundwater pumpage is expected to escalate sixfold during the next ten years. In a study undertaken to determine the feasibility of using satellite imagery as a tool in exploring for new sources of groundwater, lineaments detected on Landsat images of two study sites in Arizona were mapped. Literature related to well data in the two study areas was researched and the data were plotted. The lineaments then were correlated with the well data by means of a well- centered grid model. Correlations developed between lineament density and water well data in the two study sites support the hypothesis that a relationship exists between regional geologic structure and the presence of groundwater, and indicate that Landsat images can be used as a tool in delineating structural features.
    • Estimating Transmission Losses in Ephemeral Stream Channels

      Lane, Leonard J.; Ferreira, Virginia A.; Shirley, Edward D.; Southwest Rangeland Watershed Research Center, USDA-SEA-FR Tucson, Arizona (Arizona-Nevada Academy of Science, 1980-04-12)
      Procedures have been developed to estimate transmission loss volumes in abstracting (losing) ephemeral streams. A two -parameter linear regression equation relates outflow volume for a channel reach to the volume of inflow. A simplified two-parameter differential equation describes the transmission loss rate as a function of length and width of the wetted channel. Linkage relationships between the regression and differential equation parameters allow parameter (and thus, transmission loss) estimation for channels of arbitrary length and width. The procedure was applied using data from 10 channel reaches. Maximum loss rates were observed on Walnut Gulch, Arizona, and minimum loss rates were observed on Elm Fork of the Trinity River, Texas. All other data were between limits established at these two locations. Examples illustrate typical applications and show step-by-step procedures required to use the proposed method. Results and interpretations were summarized, and needs for additional research were specified.
    • An Evaluation of Snowmelt Lysimeters in an Arizona Mixed Conifer Stands

      Gottfried, Gerald J.; Ffolliott, Peter F.; USDA Forest Service; University of Arizona (Arizona-Nevada Academy of Science, 1980-04-12)
    • Hydrologic Evaluation of Topsoiling for Rehabilitating Black Mesa Coal Mine Lands

      Postillion, Frank G.; Bureau of Land Management, Las Vegas, Nevada (Arizona-Nevada Academy of Science, 1980-04-12)
      Two experimental paired watersheds on Black Mesa Mine, in the Four -Corners region of Arizona were compared by several hydrologic variables in order to determine their relative capabilities for vegetative reestablishment. From July 1977 to the present, precipitation ranged from 5 to 7 inches; runoff was 7 times lower on the topsoiled watershed. Because of its structureless nature, the non-topsoiled watershed tended to crust and seal the surface. In general, the sediment yield was lower on topsoiled spoils; however, increased sediment yields were observed during intense storms, possibly reflecting the fact that the topsoil was not anchored to the underlying spoils. The non-topsoiled watershed was found to have a higher soil moisture at wilting point (13.8%) and high soluble salts (3,000-5,000 ppm), making water unavailable at higher suctions. The range of available water was higher on the non-topsoiled watershed. Tests indicated that most soil moisture water storage results from winter frontal storms of long duration. A vegetation survey indicated a more successful rate of seedling establishment (8.1 plants/m) on the topsoiled watershed, but with a high subsequent die off rate due to drought conditions. Mechanical treatment of and chemical amendments to spoils and topsoils are discussed. It is concluded that the practice of topsoiling will greatly enhance revegetation of mine spoils in arid environments. If it is necessary to directly revegetate spoil materials without topsoiling, salt and drought tolerant species are recommended.
    • Irrigation Management and Water Policy: Opportunities to Conserve Water in Arizona

      Ayer, Harry W.; Hoyt, Paul G.; Natural Resource Economics Division, ESCS, USDA, Tucson, Arizona (Arizona-Nevada Academy of Science, 1980-04-12)