From the Proceedings of the 1983 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 16, 1983, Flagstaff, Arizona

From the Proceedings of the 1983 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 16, 1983, Flagstaff, Arizona

From the Proceedings of the 1984 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 7, 1984, Flagstaff, Arizona / Understanding residential water uses is important for forecasting water demand. Data from survey questionnaires received from over 2000 Tucson Water customers are used to analyze individual household water use patterns. Earlier findings by the authors based on aggregate census data are verified and expanded. Initial findings indicate that both indoor and peak outdoor water demand, modeled separately, are determined by three factors. The factors are categorized as 1) a demographic component, describing the number of people in the household and their ages, 2) a wealth component, relating water consumption to income, home value and certain appliance ownership, and 3) a residency component, which includes the age of the home, length of time the household has lived in the home, and length of time the household has lived in the Tucson area. Regression analysis indicates that households newer to Tucson consume less water than otherwise similar households. The analysis also shows that an average swimming pool consumes substantially more water than a lawn of equal area. Two actions resulting in reduced indoor water consumption are installing low-flow plumbing devices and directly paying the water bill. Water conservation program strategies based upon these findings are summarized.

From the Proceedings of the 1984 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 7, 1984, Flagstaff, Arizona

From the Proceedings of the 1984 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 7, 1984, Flagstaff, Arizona

From the Proceedings of the 1984 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 7, 1984, Flagstaff, Arizona

From the Proceedings of the 1984 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 7, 1984, Flagstaff, Arizona

From the Proceedings of the 1984 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 7, 1984, Flagstaff, Arizona

From the Proceedings of the 1984 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 7, 1984, Flagstaff, Arizona / The Universal Soil Loss Equation (USLE) was formulated for estimating soil loss from agricultural lands in the eastern United States. It has also proven to be useful in assisting land managers make better decisions for other land uses. Studies have shown that when the equation is used in areas other than where it was developed, predictions may be inadequate due to variations in estimates of the environmental parameters used in the equation. Ten years of rainfall, runoff, and sediment yield data collected by the USDA /Agricultural Research Service were used to evaluate several cover parameter values (C) presently in use in the Southwest. Preliminary analysis of data showed no statistical differences between calculated and measured cover parameter values.

From the Proceedings of the 1983 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona-Nevada Academy of Science - April 16, 1983, Flagstaff, Arizona / The ground water contamination potential of the Estes Landfill, Phoenix, Arizona has been evaluated by the City of Phoenix and the Arizona Dept. of Health Services. The landfill is located in a recharge zone of the Salt River Valley aquifer. The aquifer is under water table conditions. The depth to ground water ranges from 80 feet to 15 feet. Ground water monitoring wells were installed up- gradient and down -gradient from the landfill. Ground water samples collected from the wells during flow events of the Salt River indicated leachate production from the landfill; a mound of ground water develops and intrudes the solid waste. The leachate characteristics include volatile organics and heavy metals: vinyl chloride, trichloroethylene and barium. Analysis of solid waste borings indicated only small quantities of organics and heavy metals. Currently the ground water is used for industrial and agricultural purposes. However, the ground water could be used as a domestic water supply because it has an acceptable ambient water quality. Ground water monitoring is continuing with the intent of using the data to design a leachate migration control system for the landfill and to distinguish contaminants from an adjacent landfill.