Sites contaminated with hydrocarbons, lead, cyanide and other contaminants are found near Prescott, Chino Valley and Dewey-Humboldt see Figure 8. The sub-basins are separated by a surface drainage divide. Elsewhere in the sub-basin, water levels have generally decreased. Active Management Area Hydrology - Groundwater: The most productive portion is estimated to range from less than feet up to several hundred feet thick.
The Upper Alluvial Unit consists of relatively thick sedimentary and volcanic rocks that fill a structural trough that extends across both sub-basins.
The Fort Lowell Formation consists of unconsolidated to moderately consolidated sands and silts that are to feet thick throughout the sub-basin. Groundwater storage in the AMA during predevelopment times is estimated to have ranged from 68 maf to 76 maf to a depth of 1, feet ADWR, a.
The trough appears to have formed from basin-and-range faulting and warping and filled with alluvial, sedimentary, and volcanic rocks of Quarternary to upper Tertiary age. Prescott AMA aquifers are discontinuous, with the major aquifer found in a deep structural trough that extends 25 miles from near Dewey-Humboldt to near Del Rio Springs.
Recharge Sites Refer to Table 8. A description of aquifer data sources and methods as well as well data sources and methods, including water-level changes and well yields are found in Volume 1, Appendix A.
Principal sources of natural recharge are groundwater inflow from the south, infiltration of runoff into stream channels, and mountain front recharge. Water Level Refer to Figure 8. Sediments in this sub-basin have been divided into four hydrogeologic units that form the main regional aquifer and are hydrologically connected to varying degrees.
Well Yields Refer to Table 8. Concentrations of arsenic, metals, nitrate and other constituents that exceed drinking water standards have been measured in wells throughout the sub-basin.
Composed of silt and gravel, it includes streambed deposits along Altar and Brawley washes and ranges in thickness from less than feet to more than 1, feet. One source of well yield information, based on 1, wells, indicates that the median well yield is gpm.
The deepest water level shown is feet in the vicinity of Three Points in the Avra Valley sub-basin Figure 8. The lower alluvial unit consists of gravel and conglomerates near the edges of the valley, grading to silts and mudstones along the central axis of the sub-basin.
The pre-development groundwater in storage estimate for the sub-basin is 52 maf to a depth of 1, feet.
Volatile organic compounds VOCs associated with industrial and transportation activities are common at the contamination sites.
Natural Recharge Refer to Table 8. In addition, elevated concentrations of certain natural constituents, including arsenic, fluoride and metals have been measured in wells.
Beneath the Tinaja Beds, the Pantano Formation, composed of consolidated sandstones, conglomerates and mudstones, is little used as a water supply because of its depth and relatively low well yields. The Lower Volcanic Unit forms a highly productive confined artesian aquifer with discharge points northwest of and at Del Rio Springs.
Natural recharge also occurs along stream channels primarily the Santa Cruz River. Groundwater flow is from mountain fronts to the valley and from the south to the northwest Figure 8.
Constituents exceeding drinking water standards in the sub-basin are similar to those found in the Upper Santa Cruz Sub-basin Table 8. The recent alluvial deposits underlie streambed channels of the Santa Cruz River and its major tributaries and are generally less than feet thick. In the Little Chino Sub-basin, its thickness is difficult to determine but is estimated to be about feet thick near Del Rio Springs with a median thickness of about feet Blasch and others, The Department annually measures index wells in this AMA.
Major Aquifers Refer to Table 8.located outside the basin, the water demands can be satisfied either by harvesting stormwater from the basin or by use of reclaimed water.
The distance from turf areas to reclaimed water lines was estimated using maps provided by Tucson Water. Multipurpose Benefits of Regional Detention Basins.
Water Conservation Essay Examples. 8 total results. The Importance and Different Types of Conserving Water An Overview of the Water Conversation in the Tucson Water Basin.
to the Analysis of the Politics by George Bush. 1, words. 3 pages. An Abstract of Water Conservation in the Tucson Water Basin, City of Tucson in Arizona. 1, Tucson Washes and Watersheds Map This large-format map shows the washes (usually dry rivers) that run throughout the Tucson basin, and their associated subwatersheds.
The map also shows riparian habitat categorized under Pima County's Sonoran Desert Conservation Plan, and provides basic information about the significance of washes and. Constituents exceeding drinking water standards in the sub-basin are similar to those found in the Upper Santa Cruz Sub-basin (Table ) Avra Valley, Tucson AMA.
Highlands Basins. This panel will explore the Basin’s water supply challenges, describe the current state of Delta ecosystem – including why it matters that flows are restored and what restoration work is already being done – and conclude with offering local solutions that individuals can do. In this assignment we as a group, Tucson Water, are studying about the water sources and uses in the Tucson basin, the long term management plan of a utility.Download