A
Publish and Present
Abhishek Sharma, PhD
Coastal Engineer
Mott MacDonald
San Francisco, California
.png "Frank Salcedo, P.E. photo")
Frank Salcedo, P.E.
Engineer
Mott MacDonald
San Francisco, California
Scott Fenical, P.E., M.ASCE
Vice President, Coastal Practice Leader
Mott MacDonald
San Francisco, California
Kathryn Purcell
Project Manager
Port of San Francisco
San Francisco, California
Jonathan Roman
Project Manager
Port of San Francisco
San Francisco
Sediment characterization for material proposed to be dredged for the Mission Bay Ferry Landing (MBFL) and Water Taxi Landing (WTL) in San Francisco, CA has identified areas with elevated polycyclic aromatic hydrocarbons (PAHs) concentrations that require capping. Analysis was performed to evaluate sediment transport and potential for recontamination of the cap due to transport of PAH-laden sediment from surrounding areas, and to provide design criteria for cap erosion protection design. The analysis estimated sediment movements to the cap from specific and separate surrounding areas during typical and storm conditions occurring in the past 50 years using a fully coupled wave/current/sediment transport model. Results of the analysis show that surrounding areas with elevated PAH concentrations are subject to periodic erosion primarily during storm events, and the volume of incoming cleaner sediments dwarfs the volume of eroded nearby bed sediments, resulting in a negligible recontamination of the cap over time.