ANS

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ANS IPM in the Central Arizona and Salt River
Projects

• Major conduit of ANS
• Critical partners in IPM

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CAP and SRP are major aquatic resources in
Arizona

• Include over 800 km of major aqueduct
• Includes over 1,000 km of minor canals
• CAP includes Lake Pleasant
• SRP includes Roosevelt, Apache, Canyon, Saguaro,
  Horseshoe, and Bartlett Lakes

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Stakeholders

• Governments
• Urban water users
• Farmers
• Developers
• Aquatic recreation
• Fish and wildlife

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CAP ANS Issues

• Source water from the Colorado River
• Transport of exotic fishes, bivalves, aquatic
  weeds
• Year-round water movement

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SRP ANS Issues

• Source water from the Bradshaw and White
  Mountains
• Multiple recreation lakes in close proximity to
  metro area
• Transport of exotic fishes, bivalves, aquatic
  weeds
• Year-round water movement

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ANS Management implicationsfor operations

• Aquatic weeds impede flow
• Concern over introduction of Zebra mussels and
  other bivalves
• Taste and odor problems for potable water
• Deposition of sediments

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Traditional methods of management

• Algae and weeds - chemicals and physical
• Exotic bivalves - molluscides
• Taste and odor algae - chemicals and carbon
  filtration
• Bar grates for large fish

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Integrated PestManagement

• Education
• Exclusion
• Monitoring
• Control
• Eradication?

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Integrated PestManagement - Education

• Operating Staff
• Management
• Recreation public
• Other stakeholders

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Integrated PestManagement - Exclusion

• Work with Task Force to avoid introduction
• Control structures at inflow
• Recreation public
• Other stakeholders

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Integrated PestManagement - Monitoring

• Collectors
• Staff inspections
• SCUBA inspections
• Remote sensing
• Other agencies staff and public

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Integrated PestManagement - Control

• Algae and weeds - triploid grass carp
• Exotic bivalves - triploid bighead carp?
• Aquatic weeds - nutrient management
• Dry down
• Chemicals

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Additional Integrated PestManagement - Control

• Watershed monitoring -(Colorado Basin, Salt
  River, Bill Williams River)
• Limit transport of exotics - aquaculture,
  recreation
• Use of water for recharge - basins ideal for
  exotic plants

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Future Management Issues

• Further reduction in irrigation and more urban
  supply - better water quality
• Large amounts for recharge projects - need to
  avoid plugging
• Require more input to watershed management
• Protection of native fish, control of exotics