Laserfiche WebLink
<br />002585 <br /> <br />In the future, municipal and industrial waste waters in the <br />Southwest will increase with the population growth. Projected return <br />flows are listed on table 15. <br /> <br /> Table 15 <br />ESTIMATED URBAN RETURN FLOWS 1960-2020 <br /> (1000's of acre-feet) <br />Area 1960 1980 2000 2020 <br />Nevada <br />Las Vegas 15 35 50 70 <br />Arizona <br />Phoenix 65 190 360 610 <br />Tucson 25 75 140 240 <br />California <br />Los Angeles 630 970 1,080 1,170 <br />Santa Ana River 140 350 580 760 <br />San Diego 100 190 280 340 <br />Desert ---12 --2Q ---1lQ -.1!.Q <br />Total 1,000 1,900 2,700 3,500 <br /> <br />In Nevada the use of domestic return flows for irrigation of <br />golf courses and hotel grounds, makeup water in cooling processes, <br />and commercial irrigation is being practiced. Both the increased <br />recreational demands and the cooling requirements of thermoelectric <br />powerplants are expected to reuse significant quantities of future <br />water returns. <br /> <br />In Arizona some waste water is reused for irrigation; however, <br />most of the municipal return flows are discharged into natural water- <br />courses and recharge the ground-water. In the future this source of <br />water is expected to be fully utilized for irrigation purposes. <br /> <br />In the Los Angeles area, studies have indicated the immediate <br />feasibility of reclamation of 190,000 acre-feet for recharge, indus- <br />trial uses, and the prevention of salt-water intrusion. Other <br />studies throughout southern California show an increasing awareness <br />of the potential for beneficial reuse of these urban return flows. <br /> <br />Water Quality Improvement--Under the concept of water quality <br />improvement are two categories, sometimes interrelated. One is the <br />improvement of a poor quality water supply. Examples of this are <br /> <br />IV-6 <br />