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Title: Field measurements, sediment tracer study, and numerical modeling at Coos Bay Inlet, Oregon
Authors: Li, Honghai
Lackey, Tahirih C.
Beck, Tanya M.
Moritz, Hans R.
Groth, Katharine C.
Puckette, Trapier
Marsh, Jon
Keywords: Coos Bay (Or.)
Dredging spoil
Sedimentation and deposition
Sediment transport
Dredged material
Coastal Inlets Research Program (U.S.)
Publisher: Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL TR-18-6
Abstract: This report documents a field data collection program, including the sediment tracer study, and numerical modeling investigation for dredged material placed in the nearshore area of an ocean dredged material disposal site (ODMDS) adjacent to Coos Bay Inlet, OR. The collected data around the inlet system were assembled, analyzed, and used to calibrate and validate the Coastal Modeling System (CMS) and the Particle Tracking Model (PTM). Sediment transport pathways and fate of placed material were evaluated. The model and sediment tracer study results indicate that the tracer placed within the nearshore ODMDS primarily moves alongshore towards the inlet at the initial stage of the release. Material arriving at the inlet channel and ebb shoal is jettisoned offshore by strong ebb currents. The results also show that the sediment tracer spreads northward alongshore due to strong dominant southerly wind across the inner continental shelf. At and outside the inlet, finer particles are transported the farthest offshore and away from the navigation channel and nearshore ODMDS area. A new sediment mapping technique applied in model simulations demonstrates migration and burial for sediments placed in the nearshore ODMDS. Both CMS and PTM results compare well with those of the sediment tracer study.
Description: Technical Report
Gov't Doc #: ERDC/CHL TR-18-6
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Technical Report
Technical Report

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