ANS & IPM in the Central Arizona and Salt River Projects

Major conduit of ANS

Critical partners in IPM

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

Stakeholders

• Governments

• Urban water users

• Farmers

• Developers

• Aquatic recreation

• Fish and wildlife

CAP ANS Issues

• Source water from the Colorado River

• Transport of exotic fishes, bivalves, aquatic weeds

• Year-round water movement

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

ANS Management implications

for operations• Aquatic weeds impede flow

• Concern over introduction of Zebra mussels and other bivalves

• Taste and odor problems for potable water

• Deposition of sediments

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

Integrated PestManagement

• Education• Exclusion• Monitoring• Control• Eradication?

Integrated PestManagement - Education

• Operating Staff

• Management

• Recreation public

• Other stakeholders

Integrated PestManagement - Exclusion

• Work with Task Force to avoid introduction

• Control structures at inflow• Recreation public• Other stakeholders

Integrated PestManagement - Monitoring

• Collectors

• Staff inspections

• SCUBA inspections

• Remote sensing

• Other agencies staff and public

Integrated PestManagement - Control

• Algae and weeds - triploid grass carp

• Exotic bivalves - triploid bighead carp?

• Aquatic weeds - nutrient management

• Dry down

• Chemicals

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

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