State Water Resources Control Board

Mark Petrie

Ducks Unlimited

Conserving Bird Habitat in California

Board Members

• Audubon California

• California Waterfowl Association

• Defenders of Wildlife

• Ducks Unlimited

• PRBO Conservation Science

• River Partners

• The Nature Conservancy

• Trust for Public Land

140,363

205,554

0

50,000

100,000

150,000

200,000

250,000

1990 2006

Wetland Gains

Waterfowl Flyways

Sacramento Valley

50% of all Ducks

80% of all Geese

Recognized as a site of international importance to shorebirds

Deficit

Enough

Surplus

Population Energy Supply

Population

Objective

Bird Energy

Needs

Habitat Acres Food Densities

Central Valley Joint Venture

0

20

40

60

80

100

120

140

160

Sept

Oct

Nov

Dec

JanFeb

Mar

Waterfowl Carrying Capacity Model

Food Supply

Kcal x 1

06

Food Demand

Critical Period

Central Valley Ducks (Current Conditions)

0

50000

100000

150000

200000

250000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Energy Supply

Energy Demand (ongoing)

Food being added

Food being consumed & decomposed

CP

Central Valley Ducks (1970’s)

0

20000

40000

60000

80000

100000

120000

140000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Supply

Demand

Central Valley Ducks (Public Lands)

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Demand

Supply

Wetland Restoration 46,000 acres

Wetland Enhancement 8,800 acres

Ag Enhancement 170,000 acres

Total Water Need 1,080,000 acre-feet

Sacramento Valley Objectives

Central Valley Joint Venture

Butte Basin Public Lands Only

0

1000

2000

3000

4000

5000

6000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Demand

Supply

Butte Basin No Agricultural Habitat

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Demand

Supply

Butte Basin Current Conditions

0

5000

10000

15000

20000

25000

30000

35000

40000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Demand

Supply

Butte Basin 25% Habitat Reduction

0

5000

10000

15000

20000

25000

30000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Demand

Supply

CP

Butte Basin 25% Habitat Reduction & 25% Reduced Summer Irrigation

0

5000

10000

15000

20000

25000

30000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Demand

Supply

Butte Basin 40% Habitat Reduction & 25% Reduced Summer Irrigation

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Demand

Supply

Wetland Constraint 50% of duck energy needs must be met from wetlands

Butte Basin Wetland Requirement

0

2000

4000

6000

8000

10000

12000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Demand

Supply

Butte Basin Wetland Requirement

25% Habitat Reduction

0

1000

2000

3000

4000

5000

6000

Aug Sep Oct Nov Dec Jan Feb Mar

Kcal *

10

6

Demand

Supply

0

20

40

60

80

100

120

140

160

Kcal

x 1

06 Supply

Demand

0

100

200

300

400

500

600

700

800

900

1000

Acr

e Fe

et

UPDATED MODEL

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