From the Proceedings of the 1979 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 13,1979, Tempe, Arizona

From the Proceedings of the 1979 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 13,1979, Tempe, Arizona

From the Proceedings of the 1979 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 13,1979, Tempe, Arizona

From the Proceedings of the 1979 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 13,1979, Tempe, Arizona

From the Proceedings of the 1979 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 13,1979, Tempe, Arizona / There is a renewed interest in land application of treated effluent in both the states of Arizona and Nevada. Conservation of water and energy can be obtained by this treatment method. Data generated by the design engineer includes health effects related to heavy metals, bacteria, and aerosal spray. Examples of recent nuisance and consequences are noted. The application of this practice requires a case by case engineering and management analysis.

From the Proceedings of the 1979 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 13,1979, Tempe, Arizona

From the Proceedings of the 1979 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 13,1979, Tempe, Arizona

From the Proceedings of the 1979 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 13,1979, Tempe, Arizona / The Dry Lake Region is located in Navajo County, Arizona, near the southern margin of the Colorado Plateau. The region's internal drainage basin of 160 mi2 is further augmented by 50 mi² of the Phoenix Park Wash drainage. The dominate surface water inflow to the playa is the 12 to 13 MGD of paper pulp mill effluent from Southwest Forest Industries near Snowflake, Arizona. As a result, the playa surface water is now covering several thousand acres. Dry Lake water quality is relatively poor by Arizona Department of Health Services (ADHS) drinking water standards. Ground water in the region is produced from the Coconino Aquifer which is comprised of the Coconino Sandstone and the Kaibab Limestone. The depth to ground water is 400 feet with a saturated zone 100-175 feet thick. Wells in the region yield from 0 to 500 gpm. The presence of the Holbrook Anticline and the Dry Lake Syncline influence both ground water flow direction and artesian conditions. There is concern that the playa may not be suited as an evaporative disposal basin because of the potential influence that karst topography and linear surface features may have on the water balance of the region.

From the Proceedings of the 1980 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 11-12, 1980, Las Vegas, Nevada / 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.

From the Proceedings of the 1980 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona - Nevada Academy of Science - April 11-12, 1980, Las Vegas, Nevada / Relating water concerns and interactions to land managers has been a challenge met with only partial success. A methodology was developed that incorporates graphical techniques to visually display potentials, tradeoffs, and effects of resource management activities. This technique was applied to chaparral and ponderosa pine ecosystems to show applications to the scientist and also the nontechnical manager. Up to five variables can be displayed in a way that enable quick understandable tradeoff evaluations.