Task lead: Jessica R. Lacy
Task lead: Amy East
This task will support and further work by the USGS and collaborating federal, state, and local agencies, and academic partners, in analyzing the effectiveness of restoration work in coastal watersheds and estuaries in the Monterey Bay area. The USGS will play a supporting role in field efforts led by NOAA and California State University - Monterey Bay to measure physical and ecological changes in the Carmel River watershed resulting from the largest dam removal in California.
The over-arching aim of the task is to produce a step-change in understanding of submarine turbidity currents by (i) measuring their two key features (synchronous velocity and concentration profiles) in detail (every 2-to-30 seconds) for the first time, and (ii) documenting spatial changes in their flow velocity from source-to-sink for the first time. The following specific questions will be answered:
Task lead: Guy Gelfenbaum
USGS PCMSC is working closely with the states of Washington and Oregon, the U.S. Army Corps of Engineers, and others to bring the best available scientific information on sediment management to decision makers.
USGS PCMSC has developed a state-of-the-art process-based numerical model of hydrodynamics and sediment transport for the lower Columbia River, Columbia River Estuary, and adjacent coast, and works closely with partners to develop, calibrate and verify the model.
Because of the expertise developed over the years, USGS is sought by others to perform field work and modeling at the mouth of the Columbia River.
Task lead: Bruce Jaffe
The primary objective of this task is to develop tools for predicting the long-term geomorphic evolution of estuaries.
Sediment core and historical change analysis will be used in combination with interpretation of high-resolution seismic profiles to develop tools for predicting geomorphic evolution of estuaries. Historical change analysis will use hydrographic and lidar data. Longer-term data will be derived from sediment cores.
Task lead: Jessica R. Lacy
Four large deployments (30-40 instruments at 5-8 stations) measuring waves, currents, turbulence, and suspended sediment concentration have been completed: two in South San Francisco Bay, focused on exchange between shoal and channel, in collaboration with UC Berkeley; and two in San Pablo Bay, focused on transport between intertidal and subtidal regions, as part of a post-doctoral research project. See a video on this project at http://gallery.usgs.gov/videos/369. A smaller deployment in Corte Madera Bay was also completed, focused on wave attenuation in the shallows, as part of a larger San Francisco Bay Conservation and Development Commission project.
Task lead: Mary McGann
The objectives of his project are to investigate the vectors and timing of microbiological invasions and the subsequent dispersal of these non-native organisms due to sediment transport.
We will attempt to confirm the identification of specific invasives encountered with molecular sequencing, monitor the spread of the invading populations through their recent distribution and the historic sedimentologic record, and document the impact of the invasions on native populations.
The information we gain in this study will also aid port managers in developing plans for reducing the introduction of invasives in our nation's ports by understanding potential pathways of introductions and the temporal survival capability of these organisms during transport.