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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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