Bangor P990 Big Beef Estuary Restoration Feasibility, Tidal Hydrodynamic and Sediment Transport Modeling

cbec performed detailed field data collection, and 2-dimensional hydrodynamic and sediment transport modeling of estuarine processes at the Big Beef Creek and Estuary proposed restoration site.

cbec assisted the prime contractor to NAVFAC (U.S. Navy) with mitigation assessment and planning services in association with implementation of a new facility at the Bangor Submarine Base in the Hood Canal, Puget Sound, Washington.

At the Big Beef Estuary project site, field data collection included suspended load measurements, installation of turbidity sondes, installation of stage (water level) recorders, sediment sampling of ocean bed and fluvial systems including pebble counts and grab samples, detailed single beam and multi-beam bathymetric surveys, extensive topographic surveys using RTK GPS, and multiple Acoustic Doppler Current Profiler (ADCP) transects in the nearshore littoral zone. cbec developed and calibrated a detailed 2-dimensional (3-D capable) hydrodynamic and sediment transport model to characterize estuarine, littoral and fluvial processes at the Big Beef Estuary project site. cbec modeled existing conditions and the proposed estuarine/deltaic restoration alternative.

The Big Beef Estuary model extends from the fluvially dominated reach to the estuary surface and into the greater Hood Canal inlet system. Boundary conditions for the Big Beef model were derived from a larger model of the Puget Sound and Hood Canal. Tidal fluxes, wind and wave forces on sediment transport in the estuarine and littoral zones were modeled using the Delft3D 2-dimensional hydrodynamic model.

Details

River/Watershed: Hood Canal
Project: 11-1005