city of phoenix tres rios wetlands: water sustainability ... · phoenix receives most of its...
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City of PhoenixTres Rios Wetlands:
Water Sustainability & Efficiency
Cynthia Campbell
Water Resource Management Advisor
City of Phoenix
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Phoenix is a Desert City
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Phoenix Water Supplies
• 3% Groundwater
50% Salt/Verde Rivers
47% Colorado River
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Phoenix receives most of
its surface water from the
Salt and Verde Rivers
through the Salt River
Project.
Roosevelt Dam on the Salt River Photo credit: srp.net
50% Salt/Verde Rivers
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The Central Arizona
Project (CAP) delivers
Colorado River water
to several Phoenix
metropolitan area water
treatment plants.
Photo credit: Central Arizona Project
47% Colorado River
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Phoenix has a service area of 540 square miles and serves 1.5
million water customers and 2.5 million wastewater customers
(including customers in other cities).
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Each Year:
• Five water treatment plants
produce 300,000 acre-feet
of potable water
• Three wastewater treatment
plants treat 190,000 acre-
feet of wastewater
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Phoenix reuses 99% of its
reclaimed water
Reclaimed Water
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Reclaimed Water Uses
•Palo Verde Nuclear Generating Station
•Tres Rios Constructed Wetland
•Roosevelt Irrigation District
•Buckeye Irrigation District
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Palo Verde Nuclear Generating Station
Phoenix delivers over
65 MGD (million gallons
per day) of reclaimed
water, providing cooling
water for the PVNG station
facility.
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Tres Rios Constructed Wetland
Constructed in 2009 with
the assistance of the U.S.
Army Corps of
Engineers, Tres Rios is a
700-acre wetland that
acts as final treatment
from the 91st Avenue
Wastewater Treatment
Plant.
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Built along the banks of the Salt River,
Tres Rios is one of the largest
constructed wetlands in the U.S.
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Tres Rios
3 Purposes:
Tertiary treatment
Flood control
Habitat restoration
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From the treatment plant, 60-70 MGD of reclaimed water flows through two deep
water basins, three flow regulating cells and the overbank wetland, extending 2-3 miles
downstream.
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• Over 150 species of birds (including a large
flock of pelicans), muskrats, beaver, raccoons,
coyotes, bobcats and skunks
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Former agricultural fields were graded and contoured into wetlands.
Rushes, sedges, arrowhead, cattail, and floating aquatics were installed
to recreate wetlands of the southwestern United States.
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By mostly eliminating non-native plant species like tamarisk (salt cedar)
and bringing back cottonwood and willow, Tres Rios resembles the
wetland habitats that existed along the Salt and Gila Rivers in the 1800s.
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The Overbank portion of
the wetland is open to the
public from sunrise to
sunset, 365 days a year.
Accessing the wetland
requires a permit from the
City of Phoenix, which is
good for 3 months with
unlimited visits.
For more information, visit
www.tresrios.net
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• Phoenix established a Colorado River
Resiliency Fund that is used for watershed
protection, recharge, storage and other
activities (i.e. system conservation in Colorado
River).
• 2017 Agreement in Principle (Phoenix,
Arizona Department of Water Resources, Gila
River Indian Community and Walton Family
Foundation)
New Ideas for Sustainability
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FOREST THINNING & PRESCRIBED BURNING
STREAM & WETLAND RESTORATION HABITAT IMPROVEMENT & REVEGETATION PROJECTS
INVASIVE SPECIES MANAGEMENT SEDIMENT & EROSION MANAGEMENT
Source Water Protection
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Gila River Habitat Restoration
• In a unique arrangement with the Gila River Indian Community, Phoenix is storing a portion of its Colorado River allocation at the Community’s Olberg Dam Underground Storage Project.
• Later, Phoenix can exchange the credits it earns from recharge with the Community’s Colorado River allocation.
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Olberg Dam Underground Storage Facility
By reintroducing recharged water near
the banks of the Gila River, the
Community can begin to realize its vision of returning a riparian
habitat back to a portion of the River.
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Take Action Today
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az.audubon.org/water-news-0
For More Information
Sarah Luna, AZ WRAN
Coordinator
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