Analysis of Old River Corridor in Conjunction with the BDCP Proposed - - PowerPoint PPT Presentation

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Analysis of Old River Corridor in Conjunction with the BDCP Proposed - - PowerPoint PPT Presentation

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Analysis of Old River Corridor in Conjunction with the BDCP Proposed Project BDCP Steering Committee August 26 th , 2010 Separate Analyses Separate analyses designed to provide information to Steering Committee Separate Analyses (* =

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SLIDE 1

Analysis of Old River Corridor in Conjunction with the BDCP Proposed Project

BDCP Steering Committee August 26th, 2010

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SLIDE 2

PRELIMINARY DRAFT—NOT FOR DISTRIBUTION

Separate Analyses

  • Separate analyses designed to provide information

to Steering Committee

  • Separate Analyses (* = completed)

– *North delta intake and conveyance sizing sensitivity analysis – *North delta intake location sensitivity analysis – *Delta levee failure and sea level rise – *North delta alternative fish pathways analysis – *San Joaquin River inflow sensitivity – *Isolated Old River corridor analysis

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SLIDE 3

Objectives

  • Understand the sensitivity of the current BDCP

Proposed Project with the integration of an Isolated Old River Corridor concept in south Delta

  • Evaluate sensitivity in terms of:

– South delta flows – Change in tidal stage range – Delta water quality – Particle tracking

  • High level, preliminary analysis to provide information

to Steering Committee

PRELIMINARY DRAFT—NOT FOR DISTRIBUTION

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SLIDE 4

Methodology & Assumptions

  • Isolated OR Corridor configuration selected that “best”

fits with the Proposed Project (i.e. reduced south Delta pumping needs)

  • DSM2 studies with OR Corridor configuration and for 16‐

years of hydrology

  • River flows and exports are all maintained per BDCP

Proposed Operations (no re‐operation performed for new configuration)

  • Assume no issues conveying exports from Victoria Canal to

Clifton Court Forebay through siphon

  • Particle tracking performed for 24 distinct periods covering

broad range of flow/operating conditions

  • All simulations should be considered approximate

PRELIMINARY DRAFT—NOT FOR DISTRIBUTION

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SLIDE 5

M i d d l e R i v e r M i d d l e R i v e r San Joaquin River Old River V i c t

  • r

i a C a n a l O l d R i v e r Grant Line Canal San Joaquin River San Joaquin River Threemile Sl

Description of the Old River Corridor Scenario

Barrier with Low‐head Pump Barrier Siphon

  • BDCP Proposed Project at starting point
  • Barriers in Connection Slough, Railroad Cut,

and Woodward Cut

  • Barriers in Middle River upstream of Victoria

Canal and at head of Old River (with 250 cfs pumps for Delta Ag demand)

  • Barriers at Mouth of Old River and

Fishermans Cut

  • All barriers removed and low head pumps

idled when San Joaquin inflow exceeds 10,000 cfs

  • Improvements in Clifton Court Forebay

Dredged Channels

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SLIDE 6

South Delta Flows and Stage

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SLIDE 7

Barrier with Low‐head Pump Barrier Siphon

Change in Net Flow

  • Arrow shows direction of flow in

PP_LLT_OR scenario

  • Arrows approx. scaled to magnitude
  • f change
  • Orange arrow shows reduction in net

flow

  • Blue arrow shows increase in net flow
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SLIDE 8

Barrier with Low‐head Pump Barrier Siphon

General Location of South Delta Points Discussed

San Andreas Jersey Pt OR @ Rock Sl MR @ Bacon Prisoner’s Pt MR @ Mowry Grantline Canal OR @ Jones PP MR @ Tracy Blvd SJR @ Stockton Moke d/s

  • f Georgiana Sl

Frank’s Tract East Clifton Court Forebay

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SLIDE 9

Monthly Flow: Old River at Rock Slough

Isolated OR Corridor maintains positive downstream flow in Old River

  • 10,000
  • 5,000

5,000 10,000 15,000 20,000 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged Flow ( cfs)

NAA_LLT PP_LLT PP_LLT_OR

  • 4,000
  • 3,000
  • 2,000
  • 1,000

1,000 2,000 3,000 4,000 5,000 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Flow (cfs)

NAA_LLT PP_LLT PP_LLT_OR

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SLIDE 10

Monthly Flow: Middle River at Bacon Island

Middle River is sole south Delta export pathway in Isolated OR Corridor; more negative flows than Proposed Project

  • 20,000
  • 15,000
  • 10,000
  • 5,000

5,000 10,000 15,000 20,000 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged Flow ( cfs)

NAA_LLT PP_LLT PP_LLT_OR

  • 7,000
  • 6,000
  • 5,000
  • 4,000
  • 3,000
  • 2,000
  • 1,000

1,000 2,000 3,000 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Flow (cfs)

NAA_LLT PP_LLT PP_LLT_OR

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SLIDE 11

San Joaquin River at Jersey Point

Flow changes are primarily isolated to south and central delta; west of False River flows are similar

  • 20,000

20,000 40,000 60,000 80,000 100,000 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged Flow ( cfs)

NAA_LLT PP_LLT PP_LLT_OR

  • 2,000

2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Flow (cfs)

NAA_LLT PP_LLT PP_LLT_OR

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SLIDE 12

San Joaquin River at San Andreas

Positive SJR @ San Andreas is a critical point of control for Threemile Slough transport to pumps

  • 20,000
  • 10,000

10,000 20,000 30,000 40,000 50,000 60,000 70,000 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged Flow ( cfs)

NAA_LLT PP_LLT PP_LLT_OR

  • 4,000
  • 2,000

2,000 4,000 6,000 8,000 10,000 12,000 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Flow (cfs)

NAA_LLT PP_LLT PP_LLT_OR

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SLIDE 13

San Joaquin River at Prisoners Point

Middle River export pathway reverses SJR in region between mouth

  • f OR and

mouth of MR

  • 15,000
  • 10,000
  • 5,000

5,000 10,000 15,000 20,000 25,000 30,000 35,000 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged Flow ( cfs)

NAA_LLT PP_LLT PP_LLT_OR

  • 6,000
  • 4,000
  • 2,000

2,000 4,000 6,000 8,000 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Flow (cfs)

NAA_LLT PP_LLT PP_LLT_OR

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SLIDE 14

Water Level Changes in South Delta

High water level increasing in Middle River, Old River, and Grantline; slight reduction in SJR at Stockton Low water level increasing in Middle River, Old River, and Grantline; reduction in SJR at Stockton

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SLIDE 15

Tidal Range Changes in South Delta

Reduction in the tidal range in Old River, Middle River and Grantline Canal; Increased range in SJR at Stockton

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SLIDE 16

Water Quality

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SLIDE 17

Old River salinity improves in the fall and increases in the winter, spring, and summer likely by less Sac influence Middle River salinity is reduced in the winter and spring, but increases in the summer and fall Salinity decreased in all months in SJR upstream of Stockton Salinity decreased in all months in Old River upstream of Victoria Canal and Clifton Court Prisoner’s Point salinity increases in summer and fall seasons and minor reduction in the winter and spring At Jersey Point, salinity increases on average by 10% with the addition of the Old River Corridor

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SLIDE 18

Salinity at San Joaquin at Jersey Point

500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

San Joaquin River at Jersey Point

500 1,000 1,500 2,000 2,500 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

General increase in salinity with increased influence of San Joaquin River via Old River

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SLIDE 19

Salinity at Old River at Rock Slough

General increase in salinity with increased influence of San Joaquin River via Old River, reduction in fall EC with decreased influence of Martinez

200 400 600 800 1,000 1,200 1,400 1,600 1,800 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

Old River at Rock Slough

100 200 300 400 500 600 700 800 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

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SLIDE 20

Salinity at San Joaquin River at Prisoners Point

Fall increases as Martinez salinity not distributed in Old River (moved toward Middle River)

200 400 600 800 1,000 1,200 1,400 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

San Joaquin River at Prisoners Point

100 200 300 400 500 600 700 800 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

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SLIDE 21

Salinity at Middle River at Bacon Island

Fall increases as Martinez salinity moved into Middle River; freshening in spring with increased Sacramento River water contributions

100 200 300 400 500 600 700 800 900 1,000 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

Middle River at Bacon Island (channel 144)

100 200 300 400 500 600 700 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

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SLIDE 22

Clifton Court Forebay Inflow Salinity

Minor fall increases as Martinez salinity moved into Middle River; freshening in spring and summer with reduced San Joaquin River contributions

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SLIDE 23

Salinity at Middle River at Mowry Bridge

Improvement in salinity with reduction in residence time because

  • f low head pumps.

Similar results for San Joaquin River between Stockton and Head of Old River as well as Old River between Clifton Court and Head of Old River

200 400 600 800 1,000 1,200 10/1/1975 10/1/1978 10/2/1981 10/2/1984 10/4/1987 10/4/1990 Monthly Averaged EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

Middle River at Mowry Bridge

100 200 300 400 500 600 700 800 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP EC ((uS/cm)

NAA_LLT PP_LLT PP_LLT_OR

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SLIDE 24

Average Seasonal Percent Change in EC Proposed Project with Old River Corridor vs Proposed Project (LLT Conditions)

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SLIDE 25

Particle Transport

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SLIDE 26

Typical Winter and Early Spring Particle Entrainment

Reduced Old River & SJR entrainment; Increased Sac R, Middle River & Central Delta Entrainment

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SLIDE 27

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 Percent Entrainment for PP_LLT_OR Simulation Percent Entrainemnt for PP_LLT Simulation

South Delta Entrainment Comparison (all 24 periods, 60 day fate)

Vernalis Release Franks Tract East Mokelumne Downstream

  • f Georgiana Slough

Sacramento River at Cache Slough

Increase Decrease

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SLIDE 28

Typical Late Spring and Summer Residence Time Results

34 34 53 9 8 34 39 36 35 33 1 2 36 31 19 23 46 48 38 44 41 39 36 38 38 19 38 36 26 27 20 15 13 51 6 17 11 20

Particle Insertion date : May1937

1 2 3 4 5 6 2 4 6 8 10 12 14 May-37 Jun-37 Jul-37 Aug-37 Exports (1000 cfs) Inflow (1000 cfs)

SAC INF SJR INF IF EXP SD EXP

Residence Time of 50% Particles (Days)

PP_LLT_OR

5 5 51 50 43 38 35 1 6 40 4 30 1 38 18 44 51 50 38 42 39 39 35 38 38 20 37 35 26 26 20 16 13 51 6 17 11 20

Particle Insertion date : May1937

1 2 3 4 5 6 2 4 6 8 10 12 14 May-37 Jun-37 Jul-37 Aug-37 E x p

  • r

t s ( 1 c f s ) I n f l

  • w

( 1 c f s )

SAC INF SJR INF IF EXP SD EXP

Residence Time of 50% Particles (Days)

PP_LLT

Increased Old River Residence Times

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SLIDE 29

10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 Time in days to Clear 50% of Particles (PP_LLT_OR) Time in days to Clear 50% of Particles (PP_LLT)

Comparison of Residence Time for Proposed Project and Proposed Project with ORC features

San Joaquin River at Vernalis Frank's Tract East Mokelumne River d/s of Georgiana confluence Sacramento River near Cache Slough confluence

Release Location:

Increase Decrease

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SLIDE 30

Key Findings – Water Quality

  • Water quality along Old River and San Joaquin near Jersey Pt

show degradation

– SWP/CVP operations may be impacted depending on future compliance

  • Fall salinity in lower San Joaquin River shows minor

degradation due to Middle River export corridor

  • Salinity on San Joaquin River near Stockton & Brandt Bridge,

and upstream of Victoria Canal shows significant improvements due to increased Sacramento River water contributions

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SLIDE 31

Key Findings – Particle Entrainment

  • Reduced particle entrainment in Old River and upper San

Joaquin River

  • Increased particle entrainment in Central Delta,

Sacramento River, and Mokelumne River

  • PTM results show significant entrainment from water

moving through Georgiana Slough, Delta Cross Channel, and Threemile Slough (increases vs Proposed Project)

  • Small entrainment still occurs for releases at Vernalis

– travel down Old River, up San Joaquin, and up Middle River to export facilities

  • Need for isolation of Mokelumne

R and measures to control cross‐delta entrainment likely needed

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SLIDE 32

Key Findings – Residence Time

  • General decrease in residence time on Mokelumne

River, as the entrainment for particles released in this region increases substantially

  • General increase in residence time for San Joaquin R

near Vernalis as particles are routed into the South Delta via Old River

  • General increase in residence time on Old River

associated with its isolation

  • General increase in residence time in the vicinity of

Franks Tract

  • Minor changes in residence time on the Sacramento

River

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SLIDE 33

Key Findings – South Delta Restoration Opportunities

  • Isolation of Old River enables restoration to be

considered along this corridor

– limited opportunity under current Proposed Project configuration

  • Middle River restoration opportunities would be

limited due to increased conveyance to exports

  • Tidal range reduced in Old and Middle Rivers;

may limit “tidal” marsh opportunities

  • Increased residence times along Old River would

need to be evaluated for water quality/toxicity concerns