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Water Deficit in Arizona USA - Presentation
- 1. Water Stress in Arizona
- 2. Why Arizona? • Not enough ground water: Arizona Limits Construction Around Phoenix as Its Water Supply Dwindles • The decision by state officials very likely means the beginning of the end to the explosive development that has made the Phoenix area the fastest growing metropolitan region in the country.
- 4. Groundwater • In 1980, Arizona began regulating groundwater in the state’s largest cities and suburbs under a landmark law that called for most of these areas to achieve an overarching goal by 2025: a long-term balance between the amount of water pumped from the ground and the amount seeping back underground to replenish aquifers. • Forty-one years later, the state’s latest data shows most of the areas where groundwater is managed remain far from achieving a long-term balance, a goal known as “safe yield.” Groundwater is still overpumped in most of the state’s “active-management areas,” or AMAs. And in many places, aquifer levels continue to decline. • state’s leaders urgently need to reform Arizona’s groundwater rules to safeguard these finite reserves and reserves and prevent aquifers from continuing to drop.
- 5. The 1980 Groundwater Management Act In specific regions where groundwater supplies were most threatened, Active Management Areas (AMAs) were established including in the Phoenix, Tucson, Pinal, Prescott and Santa Cruz areas. To improve the groundwater situation, the five AMAs were designated to achieve Safe yield by 2025.
- 6. Colorado River: Central Arizona Project • Central Arizona Project (CAP), a 336-mile system that brings water to Maricopa, Pima and Pinal counties and serves more than 80% of the state’s population. • Construction of the CAP system began in 1973 and was completed 20 years later at a cost of more than $4 billion.
- 7. Colorado River is drying up • The Colorado River is drying up due to a combination of chronic overuse of water resources and a historic drought. • The water is divided among what are known as the “Upper Basin” states: Colorado, Wyoming, Utah and New Mexico; and the “Lower Basin” states: California, Arizona and Nevada. Other than these states, Mexico also receives its share.
- 8. W All these well-intentioned measures may fall far short of being able to cope with a full- blown climate crisis.
- 9. • It's the Water Atlas by ADWR (Arizona Department of Water Resources). The Water Atlas divides Arizona into seven planning areas. “Planning areas” are composed of groundwater basins and are an organizational concept that provide for a regional perspective on water supply, demand and resource issues. There is a separate Atlas volume for each planning area (Volumes 2-8), the executive summary (Volume 1) and a water sustainability assessment (Volume 9). • Update: 8 volumes are on the Arizona State University's website. You may have a look at them on this link.
- 11. • The water atlas enables the water demand (Agriculture, Municipal and Industrial) information by basin, Planning areas/Reservation, active management areas and population. The data presented is from 2001-2005 and the population data is of 2000 census. Additionally, a separate table for population is provided for each planning area and basin from 1980 to 2010 with 5 years interval and projected the population till 2030. The Water Atlas by ADWR
- 12. Average annual municipal water demand in the AMA Planning Area in acre-feet (2001-2005)
- 15. We will be using these scenarios for AZ: 1.SSP1(Sustainability) 2.SSP2 (Middle of the road)
- 16. SSP1 Land use extent 2030 2050 2100
- 17. SSP2 Land use extent 2030 2050 2100
Editor's Notes
- Contrary to popular belief, groundwater does not form underground rivers. It fills the pores and fractures in underground materials such as sand, gravel, and other rock, much the same way that water fills a sponge. It can only be removed by pumping through wells, much like a straw in a
- Safe-yield means the amount of water pumped out of the ground is the same as what goes back into underground aquifers.
- Construction of the CAP system began in 1973 and was completed 20 years later at a cost of more than $4 billion. The result is an engineering marvel.
- Safe-yield means the amount of water pumped out of the ground is the same as what goes back into underground aquifers.