Interior’s Recommendations to the SWRCB re: DCC Gate ... · Source: Vogel, 2002 Asilomar...

Interior’s Recommendations to the SWRCB re: DCC Gate Operations

• Interior will present information from past fishery studies thatindicate diversion into the interior Delta lowers juvenile salmon survival. Closing the Delta Cross Channel would be an action that is intended to reduce the number diverted.

• DWR will explain how the salmon decision tree is used to protect juvenile salmon on a real-time basis.

• Interior recommends that the salmon decision tree and DAT CALFED Ops process continue to be used to provide fish protection related to the DCC gate operations

• When the DCC studies have been completed and DCC gate operations alternatives have been evaluated (estimated 5-7 years) Interior will address the SWRCB with specific recommendations re: the WQCP DCC gate operations.

Salmon Conceptual Model and Basis for DCC Closures

SWRCB Periodic ReviewNovember 15, 2004

Pat Brandes - USFWS

Sacramento

Delta CrossChannel

Stockton

ChippsIsland

American

Rive

r

Sacramento

River

San JoaquinR

iver

SWPCVP

GeorgianaSlough

Vernalis

CliftonCourtForebay

Interior Delta

North Delta

Mossdale

Conceptual Model of juvenile salmon migration through the Delta

-Sac Basin salmon move into interior Delta through the open DCC and GS

- in the interior Delta their survival is lower

- and a function of exports

- Vulnerable to entrainment during emigration

Main-st

em Sac

ramen

to Rive

r

upper Old River

Conceptual Model of juvenile salmon migration through the Sacramento Delta


Mossdale

Flood Tide Gates openSource: Vogel 2002 Asilomar Presentation

EBB Tide DCC gates closed

Source: Vogel, 2002 Asilomar Presentation

% Freeport flow diverted into interior Delta w ith DCC gates open and closed

0.00

0.20

0.40

0.60

0.80

5000 10000 15000 20000 25000 30000

Flow (cfs) Thousand

Perc

ent w

ater

div

erte

d

open

closed

Assume more salmon move into the interior Delta when the DCC gates are open



-More move into interior Delta with gates open

-Survival is lower in the interior Delta

Mossdale

Sacramento

3

1 “Courtland” (below Steamboat and Sutter Sloughs)2 Ryde3 Isleton

21

HoodDelta CrossChannel

Rio Vista

= Release Site

Stockton

ChippsIsland

American

Rive

r

Consu

mnes R

iver

Mokelumne River

Sacramento

River

Calaveras Rive

r

San Joaquin River

SWPCVP

GeorgianaSlough

Marked juvenile salmon releasesmade on Sac River above and below the DCC and GS

Survival indices to Chipps Island of marked juvenile salmon released upstream and downstream of the Delta Cross Channel and Georgiana Slough

0

0.5

1

1.5

1984 1985 1986 1987 1988 1988 1989 1989

Upstream Downstream

DCC gates open

Surv

ival

Inde

x

Upstream < downstream (p<0.05)

Data would infer additional mortality of upstream group due to some entering DCC and GS

Survival indices to Chipps Island of marked juvenile salmon released upstream and downstream of the Delta Cross Channel and Georgiana Slough

DCC gates closed

Upstream < downstream (p<0.05)

0

0.5

1

1.5

1983 1987 1988 1988

Upstream Downstream

Surv

ival

Inde

x

Data would infer additional mortality of upstream group due to some entering GS

Sacramento

3

1 Ryde2 Georgiana Slough3 Isleton4 Lower Mok.

1

Hood

Delta CrossChannel

Rio Vista

= Release Site

Stockton

ChippsIsland

American

Rive

r

Consu

mnes R

iver

Mokelumne River

Sacramento

River

Calaveras Rive

rSan Joaquin

River

SWP

CVP

GeorgianaSlough

Release sites for marked salmonreleased on Sacramento River (Ryde and Isleton) and interior Delta (Georgiana Slough and Lower Mokelumne)

2

4

Survival indices to Chipps Island

0

0.5

1

1.5

2

2.5

0 0.5 1 1.5 2 2.5

Fall Late fall Fall Fry

Fall GS< Ryde (p<0.05)Late-fall GS<Ryde (p<0.05)

Geo

rgia

na S

loug

h/ L

ower

Mok

elum

ne

Ryde/Isleton

Inte

rior D

elta

Main-Stem Sacramento River

Fall GS< Ryde (p<0.05)Late-fall GS<Ryde (p<0.05)

Geo

rgia

na S

loug

h/ L

ower

Mok

elum

ne

0

0.005

0.01

0.015

0.02

0.025

0 0.005 0.01 0.015 0.02 0.025

Fall Late fall Fall Fry

Ryde/Isleton

Recovery Rates in the ocean fishery

Main-Stem Sacramento River

Inte

rior D

elta




-Survival is lower In the interior Delta

-and a function of exports

Mossdale

10002000

30004000

50006000

70008000

900010000

11000

EXPORTS

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8SU

RVI

VAL

y = -3E-05x + 0.4742R2 = 0.2673 (p<0.10)

n=13

12/03

12/02

(GS/

Ryd

eR

atio

)

(mean of 3 days after release)

Relationship between GS/Ryde survival ratio and CVP/SWP exports with 95% confidence intervals

y = -4E-05x + 0.5302R2 = 0.3668 (p<0.05)

y = -5E-05x + 0.7998R2 = 0.3934(p<0.05)

0

0.3

0.6

0.9

1.2

0 3000 6000 9000 12000

Ocean

Chipps Is.

N=11

GS/

Ryd

esu

rviv

al ra

tio

Exports in cfs (for 3 days after release)

Relationships between GS/Ryde survival ratio and CVP/SWP exports




- In the interior Delta, their survival is lower

- and a function of exports

MossdaleStatistical Modeling of fall run CWT recoveries is supportive of this conceptual model

Hierarchical Coefficients

Unp

aired Coe

fficients

Log Fl

ow

Hatche

ry Tem

p

Tide

Export

s/Flow

Gate

Release

Temp

Size

Turbidi

ty

Salin

ity +

+

_

0

0

Standardized coefficients and +/- 2 standard errors of two separate Newman models estimating fall run salmon smolt survival through the Delta

Results of two Fall run CWT Sacramento Delta Salmon Smolt SurvivalModels

Paired model

Unp

aire

d m

odel

R

0

20

40

60Num

ber Recovered (per 10 tow

s) Sac. TrawlOlder Juveniles*per 10 tows

NUMBER OF JUVENILE CHINOOK RECOVERED IN THESACRAMENTO RIVER AND DELTA

0

10

20

30

Num


s)

0

100

200

300

400

SWP & CVP Daily Loss

Chipps IslandOlder Juveniles*per 10 tows

SWP & CVPOlder Juveniles

1 16AUG 01

1 16SEP 01

1 16OCT 01

1 16NOV 01

1 16DEC 01

1 16JAN 02

1 15FEB 02

1 16MAR 02

1 16APR 02

1 16MAY 02

1 16JUN 02

1 16JUL 02

31

1 16AUG 01

1 16SEP 01

1 16OCT 01

1 16NOV 01

1 16DEC 01

1 16JAN 02

1 15FEB 02

1 16MAR 02

1 16APR 02

1 16MAY 02

1 16JUN 02

1 16JUL 02

31

DWR-DES 06 JUL 2004*Plus counts not includedData preliminary, subject to revision

1 16AUG 01

1 16SEP 01

1 16OCT 01

1 16NOV 01

1 16DEC 01

1 16JAN 02

1 15FEB 02

1 16MAR 02

1 16APR 02

1 16MAY 02

1 16JUN 02

1 16JUL 0231

AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

2001-2002SAC TRAWL

CHIPPS TRAWL

CVP/SWP

OLDER JUVENILES

0

20

40

60Num


s) Sac. TrawlOlder Juveniles*per 10 tows


0

10

20

30

Num


s)

0

100

200

300

400


Chipps IslandOlder Juveniles*per 10 tows


1 16AUG 01

1 16SEP 01

1 16OCT 01

1 16NOV 01

1 16DEC 01

1 16JAN 02

1 15FEB 02

1 16MAR 02

1 16APR 02

1 16MAY 02

1 16JUN 02

1 16JUL 02

31

1 16AUG 01

1 16SEP 01

1 16OCT 01

1 16NOV 01

1 16DEC 01

1 16JAN 02

1 15FEB 02

1 16MAR 02

1 16APR 02

1 16MAY 02

1 16JUN 02

1 16JUL 02

31

DWR-DES 06 JUL 2004*Plus counts not includedData preliminary, subject to revision

1 16AUG 01

1 16SEP 01

1 16OCT 01

1 16NOV 01

1 16DEC 01

1 16JAN 02

1 15FEB 02

1 16MAR 02

1 16APR 02

1 16MAY 02

1 16JUN 02

1 16JUL 0231

0

50

100

150

200

250

FORK L

ENGTH

MM

0

2

4

6

8

10

FORK LEN

GTH

INCHES

0

20

40

60

80

100

FLOWS cfs*1000

0

20

40

60

80

100

1 16 1 16 1 16 1 16 1 16 1 16 1 15 1 16 1 16 1 16 1 16 1 16 31

1 Dot =1 Observed Chinook Revised 05/12/2003

FALL

LATEFALL

WINTER

SPRING

FALL

LATEFALL

Delta OutflowSac & SJ RiversSWP & CVP

OBSERVED CHINOOK SALVAGE AT THE SWP & CVPDELTA FISH FACILITIES 8/1/01 THROUGH 07/31/02

No Adipose Fin Clip - Not Tissue SampledNo Adipose Fin Clip - Tissue Sampled, not DNA AnalyzedNo Adipose Fin Clip - DNA Analyzed, Non-Winter RunNo Adipose Fin Clip - DNA Analyzed, Winter Run


2001-2002SAC TRAWL

CHIPPS TRAWL

CVP/SWP

OLDER JUVENILES/ WINTER RUN

0

20

40

60

Num

ber Recov

ered

(pe

r 10

tow

s) Sacramento TrawlOlder Juveniles*(per 10 tows)

0

10

20

30

Num

ber Recov

ered

(pe

r 10

tow

s) Chipps Island TrawlOlder Juveniles*(per 10 tows)

0

300

600

900

1200

1500




Plus counts not includedDWR-DES 09 JUN 2003

PRELIMINARY, SUBJECT TO REVISION

1 16AUG 00

1 16SEP 00

1 16OCT 00

1 16NOV 00

1 16DEC 00

1 16JAN 01

1 15FEB 01

1 16MAR 01

1 16APR 01

1 16MAY 01

1 16JUN 01

1 16JUL 01

31

1 16AUG 00

1 16SEP 00

1 16OCT 00

1 16NOV 00

1 16DEC 00

1 16JAN 01

1 15FEB 01

1 16MAR 01

1 16APR 01

1 16MAY 01

1 16JUN 01

1 16JUL 01

31

1 16AUG 00

1 16SEP 00

1 16OCT 00

1 16NOV 00

1 16DEC 00

1 16JAN 01

1 15FEB 01

1 16MAR 01

1 16APR 01

1 16MAY 01

1 16JUN 01

1 16JUL 01

31

2000-2001SAC TRAWL

CHIPPS TRAWL

CVP/SWP

OLDER JUVENILES


0

20

40

60

Num

ber Recov

ered

(pe

r 10

tow

s) Sacramento TrawlOlder Juveniles*(per 10 tows)

0

10

20

30

Num

ber Recov

ered

(pe

r 10

tow

s) Chipps Island TrawlOlder Juveniles*(per 10 tows)

0

300

600

900

1200

1500






1 16AUG 00

1 16SEP 00

1 16OCT 00

1 16NOV 00

1 16DEC 00

1 16JAN 01

1 15FEB 01

1 16MAR 01

1 16APR 01

1 16MAY 01

1 16JUN 01

1 16JUL 01

31

1 16AUG 00

1 16SEP 00

1 16OCT 00

1 16NOV 00

1 16DEC 00

1 16JAN 01

1 15FEB 01

1 16MAR 01

1 16APR 01

1 16MAY 01

1 16JUN 01

1 16JUL 01

31

1 16AUG 00

1 16SEP 00

1 16OCT 00

1 16NOV 00

1 16DEC 00

1 16JAN 01

1 15FEB 01

1 16MAR 01

1 16APR 01

1 16MAY 01

1 16JUN 01

1 16JUL 01

310

50

100

150

200

250

FORK L

ENGTH

MM

0

2

4

6

8

10

FORK LEN

GTH

INCHES

40

60

80

100

OW

S cfs*1

000

40

60

80

100Delta OutflowSac & SJ RiversSWP & CVP

Cross ChannelGates Open

1 Dot = 1 Observed Chinook Revised 7/22/03

OBSERVED CHINOOK SALVAGE AT THE SWP & CVPDELTA FISH FACILITIES 8/1/00 THROUGH 7/31/01

FALL

LATEFALL

WINTER

SPRING

FALL

LATEFALL

DELTA MODEL

DELTA MODEL

No Adipose Fin Clip - Not Tissue SampledNo Adipose Fin Clip - Tissue Sampled,Not DNA AnalyzedNo Adipose Fin Clip - DNA Analyzed, Non WinterDNA Analyzed - Winter

2000-2001SAC TRAWL

CHIPPS TRAWL

CVP/SWP

OLDER JUVENILES/ WINTER RUN


0

200

400

600

Num

ber Rec

overed

(pe

r 10

tow

s) Sacramento TrawlFry/Smolts*(per 10 tows)

0

200

400

600

Num

ber Rec

overed

(pe

r 10

tow

s) Chipps Island TrawlFry/Smolts*(per 10 tows)

0

1200

2400

3600

4800

6000

SWP & CVP Daily Los

s

SWP & CVPFry/Smolts

NUMBER OF FRY/SMOLT CHINOOK RECOVERED IN THESACRAMENTO RIVER AND DELTA



1 16AUG 00

1 16SEP 00

1 16OCT 00

1 16NOV 00

1 16DEC 00

1 16JAN 01

1 15FEB 01

1 16MAR 01

1 16APR 01

1 16MAY 01

1 16JUN 01

1 16JUL 01

31

1 16AUG 00

1 16SEP 00

1 16OCT 00

1 16NOV 00

1 16DEC 00

1 16JAN 01

1 15FEB 01

1 16MAR 01

1 16APR 01

1 16MAY 01

1 16JUN 01

1 16JUL 01

31

1 16AUG 00

1 16SEP 00

1 16OCT 00

1 16NOV 00

1 16DEC 00

1 16JAN 01

1 15FEB 01

1 16MAR 01

1 16APR 01

1 16MAY 01

1 16JUN 01

1 16JUL 01

31

2000-2001 SAC TRAWLMOSSDALE TRAWL

CHIPPS TRAWL

CVP/SWP


The basis of DCC fish protective actions in the Delta for juvenile salmonis based on evidence that indicates:

-survival in the Delta is lower in the interior Delta

- and that with the DCC gates closed a lower percent of water and presumably juvenile salmon is diverted into the interior Delta

This action will likely increase the survival of juvenile salmon through the Delta

The timing of action is designed to increase survival during periods of high abundance of the various races/runs

Interior’s Recommendations to the SWRCB re: DCC Gate Operations

• Interior presented information from past fishery studies that indicate diversion into the interior Delta lowers juvenile salmon survival. Closing the Delta Cross Channel would be an action that is intended to reduce the number diverted.

• DWR will explain how the salmon decision tree is used to protect juvenile salmon on a real-time basis.

• Interior recommends that the salmon decision tree and DAT CALFED Ops process continue to be used to provide fish protection related to the DCC gate operations

• When the DCC studies have been completed and DCC gate operations alternatives have been evaluated (estimated 5-7 years) Interior will address the SWRCB with specific recommendations re: the WQCP DCC gate operations.

0

0.5

1

1.5

0 0.5 1 1.5

Open Closed

Survival indices to Chipps Island of marked juvenile salmon released upstream and downstream of the Delta Cross Channel and Georgiana Slough with DCC gates open and closed

Survival indices of Downstream Groups

Surv

ival

indi

ces

of u

pstre

am g

roup

s

Loss due to GS

Loss due to open DCC

y = -5E-05x + 0.7998R2 = 0.3934(p<0.05)

0 2000 4000 6000 8000 10000 12000EXPORTS

0.0

0.3

0.6

0.9

1.2SU

RVI

V AL

0 2000 4000 6000 8000 10000 12000EXPORTS

0.0

0.3

0.6

0.9

1.2SU

RVI

V ALO

CE A

Ocean

Chipps Is.

N=11

Exports in cfs (for 3 days after release)

y = -4E-05x + 0.5302R2 = 0.3668 (p<0.05)

GS/

Ryd

eSu

rviv

al R

atio

(with

95%

con

fiden

ce in

terv

als)

Interior’s Recommendations to the SWRCB re: DCC Gate ... · Source: Vogel, 2002 Asilomar...

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Transcript of Interior’s Recommendations to the SWRCB re: DCC Gate ... · Source: Vogel, 2002 Asilomar...