Prepared for:Feast & Famine WorkshopDecember 1st, 2015

John ter BorgGraduate Studies UBC

Master of Land & Water Systems

Outline

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1.Agriculture Water Supply

2.Salt Wedge

3.Salinity

4.Study

Lower Fraser River

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ALR – METRO VANCOUVER

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AGRICULTURE WATER DEMAND - DELTA

(Year 2080 Estimate)

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Agriculture Water Supply

DELTA AGRICULTURAL WATER SUPPLY

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EAST RICHMOND AGRICULTURAL WATER SUPPLY

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Salt Wedge

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SALT WEDGE

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ESTUARY DIMENSIONS

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TIDAL RANGE – FRASER RIVER

11 foottidal range

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Fraser River – Partially Mixed Estuary

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Salinity

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CROP SALT TOLERANCE

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400 µS/cmcranberry threshold

Ocean water 35,000 ppm(about 3.5% salt)

CROP SALT TOLERANCE

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DELTA - IRRIGATION SUPPLY

Avg. Monthly SalinityRed = Oct. 2008Blue = Nov. 2008

400 µS/cm

cranberry threshold

RICHMOND SALINITY MONITORING

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Salinity

Level Safe

70% of

time

RICHMOND SALINITY MONITORING

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Salinity

Level safe

25% of

time

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Study

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Salinity Benchmarking

Salt wedge isprimarily influenced by:

1) Fraser River flow rate (discharge)2) Tidal fluctuations (sea level)3) Channel depth (dredging)

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N

Source (2013): googlemaps

INTAKE LOCATIONS

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9

76

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3

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Irrigation IntakesDelta1. Mason PS2. Chillukthan Slough (15 km)3. Green Slough4. McDonald PS (20 km)5. 80th St FB “Tasker” (25 km)6. 96th St FB (28.5 km)7. Highway 91 FB (30 km)Richmond8. Finn Slough, South9. No. 6 Rd. South10. No. 7 Rd. North11. No. 8 Rd. North

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GLOBAL TEMPERATURE ANOMALIES

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CANADIAN TEMPERATURE TRENDS

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(1948 - 2012)

SEA LEVEL RISE - HISTORIC

27Ref: Sea level rise adaptation primer, A toolkit to build adaptive capacity on Canada’s south coasts, January 2013BC Ministry of Environment (Arlington Group)

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SEA LEVEL RISE - PROJECTED

Ref: Sea level rise adaptation primer, A toolkit to build adaptive capacity on Canada’s south coasts, January 2013BC Ministry of Environment (Arlington Group)

Sea Level Rise

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Sea LevelRise

Projection(year)

7. 3.0 m

6. 2.5

5. 2.0 m 2200

4. 1.5

3. 1.0 m 2100

2. 0.5

1. 0 m 2015

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FRASER RIVER - HYDROGRAPH

Hydrograph Change

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September OctoberJanuary April

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Dredging

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Dredging – Depth

11.5 FootDepth

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Dredging – Navigational Channel

Dredging - Scenarios

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Dredging

Depth (m)

Navigation

Channel

10. 20 m

9. 19 m

8. 18 m Panama Canal drafts

7. 17 m

6. 16 m

5. 15 m

4. 14 m

3. 13.2 m PMV - Post tunnel

2. 12 m

1. 11.5 m Massey Tunnel (59’)

- 10.7 m 1976

- 8.7 m 1960’s

- 5 m Without dredging

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PRESENTATION OF DATA