Megan Kaun San Francisco District (415) US Army Corps of Engineers BUILDING STRONG ® San Francisco District Sediment Transport Modeling to Inform Dredged Material Management 20 April 2010

BUILDING STRONG ® As of 18-Aug-092 US Army Corps of Engineers San Francisco District Topics for Discussion  SF Bay Dredged Material Management Plan (DMMP).  Information Gaps Important to USACE Dredging Program.  Recent USACE SF Bay Sediment Modeling.  USACE “White Paper” Model Evaluation.  Proposed Modeling Strategy for DMMP.

BUILDING STRONG ® As of 18-Aug-093 US Army Corps of Engineers San Francisco District S.F. Bay Dredged Material Management Plan (DMMP)  20-year management plan for sediments dredged by USACE in SF Bay Region.  11 Federal Channels  Includes O&M dredging & new work.  Tiered under LTMS program (40/40/20 plan).  Scheduled for 2012 completion.  Sediment modeling “White Paper” presents research options to program managers.

BUILDING STRONG ® As of 18-Aug-094 US Army Corps of Engineers San Francisco District USACE Dredging Program Information Gaps  Changes to navigational dredging requirements as a result of sea level rise and decreasing sediment load.  Increase in annual O&M dredging volumes as a result of new work & deepening projects.  Potential to use sediment as a resource.

BUILDING STRONG ® As of 18-Aug-095 US Army Corps of Engineers San Francisco District USACE SF Bay Sediment Modeling  Deep Water Ship Channels (SF Bay to Stockton and Sacramento)  UnTRIM (3D)  Hamilton Restoration Area, Aquatic Transfer Facility (ATF)  UnTRIM (3D) + Particle Tracking Model (FISH-PTM)  South Bay Shoreline  ADH (2D)

BUILDING STRONG ® As of 18-Aug-096 US Army Corps of Engineers San Francisco District Deep Water Ship Channels: SF Bay to Stockton &Sacramento 3D UnTRIM  UnTRIM model used to estimate shoaling based on bottom shear stress in proposed ship channels.  With and without sea level rise conditions. UnTRIM Model Domain

BUILDING STRONG ® As of 18-Aug-097 US Army Corps of Engineers San Francisco District Hamilton Restoration Area, ATF 3D UnTRIM + FISH-PTM  UnTRIM model used to calculate 3D velocity field for a given time interval.  Particle tracking (FISH-PTM) used to estimate fate of placed sediment. Predicted deposition patterns resulting from repeated dredged sediment placement (spring tides).

BUILDING STRONG ® As of 18-Aug-098 US Army Corps of Engineers San Francisco District South Bay Shoreline ADH (2D) Boundary Conditions: (Tide and Surge) Boundary Conditions: (Tide and Surge) Wind (speed and direction) Wind (speed and direction) Coarse Grid Fine Grid

BUILDING STRONG ® As of 18-Aug-099 US Army Corps of Engineers San Francisco District “White Paper” Model Evaluation  Prefer a Hydrodynamic + Wind Wave model + Sediment Transport (cohesive and non-cohesive) model that has/is:  3D capabilities to represent “gravitational circulation”,  An unstructured grid to capture complex geometry/bathymetry,  Able to simulate hydraulic structures,  Well documented/tested and supported by scientific community,  Available to apply to SF Bay study area now to include results in 2012 DMMP.  Models considered include: ADH, CMS, DELFT3D, EFDC, MIKE3, UnTRIM, SUNTANS.

BUILDING STRONG ® As of 18-Aug-0910 US Army Corps of Engineers San Francisco District Proposed Modeling Strategy, 2012 DMMP  Expand UnTRIM 3D Hydrodynamic model:  Integrate 3D Sediment Transport model (SediMorph).  Link to wind wave model (K-model/SWAN).  Calibrate & verify model:  Hydrodynamic model calibration will be refined, especially in the Central & South Bay.  Wind wave model will be calibrated using wave data.  Sediment transport model will be calibrated to (limited) sediment flux data.

BUILDING STRONG ® As of 18-Aug-0911 US Army Corps of Engineers San Francisco District Proposed Modeling Strategy, 2012 DMMP (cont.)  Primary model application:  Identify and assess aquatic locations for potential beneficial use sites.  Proposed beneficial use sites will be screened by DMMP/LTMS team as areas for future pilot studies.  Secondary model application:  Approximate changes to USACE maintenance dredging needs over next 20 years (2035) at selected SF Bay federal navigation channels due to sea level rise and decreased sediment loads.

BUILDING STRONG ® As of 18-Aug-0912 US Army Corps of Engineers San Francisco District Questions? Megan Kaun (415) Frank Wu (415)