U.S. Department of the Interior U.S. Geological Survey Bathymetric & Bird Surveys Ponds 9 & 10, Wash Ponds, and Napa Plant Site U.S. Geological Survey.

U.S. Department of the InteriorU.S. Geological Survey

Bathymetric & Bird Surveys Ponds 9 & 10, Wash Ponds,

and Napa Plant Site

U.S. Geological Survey

Acknowledgements

USGS Western Ecological Research Center

USGS Priority Ecosystem Studies, SF Bay Program

California Department of Fish and Game – Karen Taylor, Tom Huffman, Mike Sipes, Larry Wyckoff, Stacy Martinelli

Wildlife Conservation Board - Bonnie Turner, Tony Chappelle

Ducks Unlimited – Renee Spenst, Steve Carroll, Austin Payne, Russell Lowgren, Fritz Reid, Ron Galindo

State Coastal Conservancy – Amy Hutzel, Nadine Hitchcock, Betsy Wilson

SF Bay Joint Venture - Beth Huning, Christina Sloop

GAIA Consulting, Inc. - Susanne von Rosenberg

Cargil Salt - Butch Paredes

Bathy / Bird Field Support - Joel Shinn, Tanya Graham, Erin Flynn, Chris Potter, Laura Hollander, and Jeff Leichty

Bathymetric Survey Overview

Goal: Collect baseline elevation data for Napa Plant Site, Wash ponds, & Ponds 9&10

With future surveys we can document geomorphological changes that have occurred since restoration of tidal flow

Bathymetry Survey Methods

Pelican Case with Navisound

RTK Antenna

Console with

laptop & RTK

Transducer

Bathymetry Survey Methods

100m transects

Ponds 9 & 10 Wash Ponds

Bathymetry Survey Methods

200m transects

Ponds 9 & 10 ~ Current Elevation

Mean elevation: 0.71 ± 0.40m (mean ± SE)

Elevation Range: - 1.86 to 1.55m

Wash Ponds ~ Current Elevation

Mean elevation: 1.06 ± 0.26m

Elevation Range: -0.46 to 1.66m

NPS ~ Current Elevation

Mean elevation: 0.84 ± 0.31m

Elevation Range: -2.56 to 1.65m

Low Tide Bird Surveys

Low Tide Bird Surveys – Small Shorebirds

Pond 910 Breach CRYST breachsu

mm

er 2

008

fall 2

008

winter

200

9

sprin

g 20

09

sum

mer

200

9

fall 2

009

winter

201

0

sprin

g 20

10

sum

mer

201

0

fall 2

010

0

500

1000

1500

2000

2500

CRYST Avg.

WASH Avg.

910 Avg.

WASH Breach

sum

mer

200

8

fall 2

008

winter

200

9

sprin

g 20

09

sum

mer

200

9

fall 2

009

winter

201

0

sprin

g 20

10

sum

mer

201

0

fall 2

010

0

50

100

150

200

250

CRYST Avg.

WASH Avg.

910 Avg.

Low Tide Bird Surveys – Medium Shorebirds

Pond 910 Breach CRYST breachWASH Breach

sum

mer

200

8

fall 2

008

winter

200

9

sprin

g 20

09

sum

mer

200

9

fall 2

009

winter

201

0

sprin

g 20

10

sum

mer

201

0

fall 2

010

0

100

200

300

400

500

600

CRYST Avg.

WASH Avg.

910 Avg.

Low Tide Bird Surveys – Ducks

Pond 910 BreachCRYST breachWASH Breach

sum

mer

200

8

fall 2

008

winter

200

9

sprin

g 20

09

sum

mer

200

9

fall 2

009

winter

201

0

sprin

g 20

10

sum

mer

201

0

fall 2

010

0

200

400

600

800

1000

1200

1400

1600

CRYST Avg.

WASH Avg.

910 Avg.

Dabbling Ducks Diving Ducks

CRYST breachPond 910 Breach

WASH Breach

Low Tide - Crystallizers

Low Tide – WASH ponds

sum

mer

200

4

winter

200

5

sum

mer

200

5

winter

200

6

sum

mer

200

6

winter

200

7

sum

mer

200

7

winter

200

8

sum

mer

200

8

winter

200

9

sum

mer

200

9

winter

201

0

sum

mer

201

0

02000400060008000

1000012000140001600018000

CRYST Avg.

WASH Avg.

910 Avg.

High Tide Bird Surveys – Shorebirds

Small Shorebirds

sum

mer

200

4

winter

200

5

sum

mer

200

5

winter

200

6

sum

mer

200

6

winter

200

7

sum

mer

200

7

winter

200

8

sum

mer

200

8

winter

200

9

sum

mer

200

9

winter

201

0

sum

mer

201

0

050

100150200250300350400450500

CRYST Avg.

WASH Avg.

910 Avg.

Medium Shorebirds

sum

mer

200

4

sprin

g 20

05

winter

200

6

fall 2

006

sum

mer

200

7

sprin

g 20

08

winter

200

9

fall 2

009

sum

mer

201

0

0

100

200

300

400

500

600

700

CRYS Avg.

WASH Avg.

910 Avg.

High Tide Bird Surveys – Ducks

Diving DucksDabbling Ducks

sum

mer

200

4

winter

200

5

sum

mer

200

5

winter

200

6

sum

mer

200

6

winter

200

7

sum

mer

200

7

winter

200

8

sum

mer

200

8

winter

200

9

sum

mer

200

9

winter

201

0

sum

mer

201

0

0

50

100

150

200

250

CRYS Avg.

WASH Avg.

910 Avg.

Questions?