1. Working with D-Flow Flexible Mesh in the San Francisco Estuary
Gerben de Boer, Arthur van Dam, Ali Dastgheib, Edwin Elias, Bruce Jaffe, Bert Jagers, Noah Knowles, Herman Kernkamp, Hans Los, Lisa Lucas, Dano Roelvink, Mick van der Wegen and others

2. California California Sacramento San Francisco 500 km Los Angeles
Courtesy J. Cloern

3. Delta Sierra Nevada Sacramento R. San Joaquin R. San Francisco Bay
Pacific Ocean 2
Courtesy J. Cloern

4. Sacramento river
Bay
San Joaquin

5. Characteristic river discharge

6. Water export

7. San Francisco Estuary in the 1980s San Pablo Bay Suisun Bay
Area: ~1200 km2
Average depth: 7 m
Median depth: m
Deepest point: ~120 m
(Golden Gate)
Central Bay
Point out color scheme
Point out 10 km scale bar
Point out sub-embayment names
1980s is the most recent complete bay bathymetry data set
Average depth increased by deep Central Bay
South Bay
Jaffe 2009

8. San Pablo Bay

11. Cascade project 1.3 M USD Financed by USGS and DWR California
Scientific approach to
study climate change impact on water quality dynamics
Central place for D-Flow Flexible Mesh

12. Flexibility: Orthogonal curvilinear grids + triangles + pentagons+…
October 12, 2010

13. Flexibility: Orthogonal curvilinear grids + triangles + pentagons+…
October 12, 2010

18. High Qr

19. High Qr Low Qr
Pumping No pumping

20. Calibration periods Dec 16 1999 - Mar 16 2000 (high Q)
Jul – Oct (low Q)
Water level plots at GGT

28. WL Amplitudes
North bay up to Sacramento
South bay

29. Phases
North bay up to Sacramento
South bay

30. A region
B region
F region
D region
C region
E region

31. Water level amplitudes Delta
measurement
model
landward

32. Modeling Scenarios CasCade 2
Impact of
Changing river flow (100 years)
Sea level rise (100 years)
Anthropogenic acts (10 years) on
SSC and morphodynamics
Selenium contamination
Valve distribution and contamination
Phytoplankton growth

34. California water system moves water north to south34 34

35. Restrict Southerly Flows
Biological Opinions
Restrict Southerly Flows
Sacramento
The flows from the rivers and tributaries flowing east to west is continually being pushed back and forth tidally (east & west), which provides varying salinity throughout the Delta.
The recent biological opinions have significantly restricted water supply flows southerly.
Stockton
SWP Pumps
CVP Pumps 35 35

36. System Vulnerabilities
Fishery Declines Delta smelt
Subsidence
Catastropic Event Acute Occurence
Climate Change

37. Land Subsidence Due to Farming & Peat Soil Oxidation
- 7.6 M (- 25 ft.)
-6.1 M (- 20 ft.)
- 4.6 M (- 15 ft.)
-1.5 M (- 5 ft.)
Below Sea Level -8 -6 -3
-1 m

38. Bay Delta Conservation Plan Conveyance options
Sacramento
Sac River
BDCP is looking at four basic ways of moving water supplies around, under or through the Delta to avoid the conflicts with fish.
Through Delta Conveyance
Dual Conveyance – East Alignment
Dual Conveyance – West Alignment
Dual Conveyance – Central Tunnel Alignment
There are two peripheral canals under investigation, the traditional route along the eastern Delta and an alternate to the west. There is also serious consideration of a tunnel from the northern Delta to the existing water projects to the south. Construction costs may be higher but may prove more benign from an environmental perspective given its lessened footprint. There is also a look at how to continue to move water through the Delta. BDCP will have to exhaustively look at a variety of alternatives to meet legal requirements for a thorough environmental review.
Stockton
SWP Pumps
SJ River
CVP Pumps 38

39. BDCP New Delta Conveyance Cost Analysis
Bay-Delta Conservation Plan
BDCP New Delta Conveyance Cost Analysis
East Canal ~ $8 billion * West Canal ~ $ billion * All Tunnel ~ $ billion *
Preliminary Subject to Revision
Thanx to Peter Wijsman (Arcadis) for slides

40. Fin