Drag and sediment transport: conditions at the bottom boundary

Science Center Objects

This research is part of the project “Sediment Transport in Coastal Environments

Two people hold onto a large metal tripod with instruments suspended from a cable as they guide it into the water.

USGS physical scientist Cordell Johnson, at left, and USGS research oceanographer Jessie Lacy, both from the Pacific Coastal and Marine Science Center, guide a tripod with instruments into the waters of the Mokelumne River where it meets the San Joaquin River. The Mokelumne is part of the vast Sacramento-San Joaquin River Delta in California, located east of San Francisco Bay and south of Sacramento. Photo credit: John Koster, USGS.

Objectives:

Investigate the influence of seafloor properties, including bed sediment grain size, bedform morphology, and vegetation characteristics, on sediment resuspension and transport.
Develop parameterizations of the influence of seafloor properties on sediment transport for inclusion in numerical models.
Investigate the temporal variability of bed-sediment grain size on event and seasonal time scales, and investigate the response of bedform morphology to changes in bed sediment grain size.
Collaborate with Team members in collecting oceanographic and sediment transport data to advance understanding of coastal ecosystems and coastal hazards