Andrew Stevens
Oceanographer with the USGS Pacific Coastal and Marine Science Center
Explore my published data sets on USGS ScienceBase, or choose the Data and Tools tab below.
Education and Certifications
College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR
M.S., Oceanography, November 2004Humboldt State University, Arcata, CA
B.S., Oceanography, May 2002 (with honors)
Science and Products
Filter Total Items: 49
Bathymetry and topography data from the Elwha River delta, Washington, May 2011 Bathymetry and topography data from the Elwha River delta, Washington, May 2011
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry and topography data from the Elwha River delta, Washington, September 2010 Bathymetry and topography data from the Elwha River delta, Washington, September 2010
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, March 2013 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, March 2013
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, September 2013 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, September 2013
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, April and May 2014 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, April and May 2014
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Digital seafloor images and sediment grain size from the mouth of the Columbia River, Oregon and Washington, 2014 Digital seafloor images and sediment grain size from the mouth of the Columbia River, Oregon and Washington, 2014
Geo-referenced digital imagery of in-situ seafloor sediments in the mouth of the Columbia River was collected and analyzed to determine median grain size of the surface sediments. Digital imagery of the seafloor was collected with a flying eyeball (Rubin and others, 2007) from the R/V Parke Snavely from September 11 to September 13, 2014 (USGS Field Activity 2014-642-FA). The flying...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, September 2014 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, September 2014
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain size data from the Elwha River delta, Washington, January 2015 Bathymetry, topography, and sediment grain size data from the Elwha River delta, Washington, January 2015
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain size data from the Elwha River delta, Washington, July 2016 Bathymetry, topography, and sediment grain size data from the Elwha River delta, Washington, July 2016
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, July 2015 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, July 2015
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, February 2016 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, February 2016
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Digital Elevation Model of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015 Digital Elevation Model of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015
This USGS Data Release presents data collected from bathymetric and topographic surveys and the resulting digital elevation model for the Little Holland Tract in the Sacramento-San Joaquin River Delta, California. During May and June of 2015, a team of scientists from the USGS Pacific Coastal and Marine Science Center (PCMSC) conducted multiple surveys (USGS Field Activity 2015-642-FA)...
Filter Total Items: 49
No results found.
Filter Total Items: 43
Evaluation of a Single-Beam Sonar System to Map Seagrass at Two Sites in Northern Puget Sound, Washington Evaluation of a Single-Beam Sonar System to Map Seagrass at Two Sites in Northern Puget Sound, Washington
Seagrass at two sites in northern Puget Sound, Possession Point and nearby Browns Bay, was mapped using both a single-beam sonar and underwater video camera. The acoustic and underwater video data were compared to evaluate the accuracy of acoustic estimates of seagrass cover. The accuracy of the acoustic method was calculated for three classifications of seagrass observed in underwater...
Authors
Andrew W. Stevens, Jessica Lacy, David Finlayson, Guy Gelfenbaum
Bathymetry, substrate and circulation in Westcott Bay, San Juan Islands, Washington Bathymetry, substrate and circulation in Westcott Bay, San Juan Islands, Washington
Nearshore bathymetry, substrate type, and circulation patterns in Westcott Bay, San Juan Islands, Washington, were mapped using two acoustic sonar systems, video and direct sampling of seafloor sediments. The goal of the project was to characterize nearshore habitat and conditions influencing eelgrass (Z. marina) where extensive loss has occurred since 1995. A principal hypothesis for...
Authors
Eric E. Grossman, Andrew Stevens, Chris Curran, Collin Smith, Andrew Schwartz
Nearshore circulation and water-column properties in the Skagit River Delta, northern Puget Sound, Washington: Juvenile Chinook Salmon habitat availability in the Swinomish Channel Nearshore circulation and water-column properties in the Skagit River Delta, northern Puget Sound, Washington: Juvenile Chinook Salmon habitat availability in the Swinomish Channel
Time-series and spatial measurements of nearshore hydrodynamic processes and water properties were made in the Swinomish Channel to quantify the net direction and rates of surface water transport that influence habitat for juvenile Chinook salmon along their primary migratory corridor between the Skagit River and Padilla Bay in northern Puget Sound, Washington. During the spring...
Authors
Eric E. Grossman, Andrew Stevens, Guy Gelfenbaum, Christopher Curran
In situ time-series measurements of subseafloor sediment properties In situ time-series measurements of subseafloor sediment properties
The capabilities and diversity of subsurface sediment sensors lags significantly from what is available for the water column, thereby limiting progress in understanding time-dependent seabed exchange and high-frequency acoustics. To help redress this imbalance, a new instrument, the autonomous sediment profiler (ASP), is described herein. ASP consists of a four-electrode, Wenner-type...
Authors
R. Wheatcroft, A.W. Stevens, R.V. Johnson
Beach morphology monitoring in the Elwha River Littoral Cell, 2004-2009 Beach morphology monitoring in the Elwha River Littoral Cell, 2004-2009
This report describes the methods used, data collected, and results of the Beach Morphology Monitoring Program in the Elwha River Littoral Cell, starting in 2004. The U.S. Geological Survey and the Washington State Department of Ecology collaborated in the data collection with the support of the local Lower Elwha Klallam Tribe. Beach monitoring efforts consisted of collecting topographic...
Authors
Jonathon Warrick, Douglas George, Andrew W. Stevens, Jodi Eshleman, Guy Gelfenbaum, George Kaminsky, Andrew Schwartz, Matt Bierne
Mississippi delta mudflow activity and 2005 gulf hurricanes Mississippi delta mudflow activity and 2005 gulf hurricanes
[No abstract available]
Authors
J.P. Walsh, D.R. Corbett, D. Mallinson, M. Goni, M. Dail, C. Loewy, K. Marciniak, K. Ryan, C. Smith, A. Stevens, B. Summers, T. Test
Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling
Continual sediment accumulation in Capitol Lake since the damming of the Deschutes River in 1951 has altered the initial morphology of the basin. As part of the Deschutes River Estuary Feasibility Study (DEFS), the United States Geological Survey (USGS) was tasked to model how tidal and storm processes will influence the river, lake and lower Budd Inlet should estuary restoration occur
Authors
Douglas George, Guy Gelfenbaum, Giles Lesser, Andrew W. Stevens
Non-USGS Publications**
Stevens, A.W. , Wheatcroft, R.A., Wiberg, P.L., 2007, Seabed properties and sediment erodibility along the western Adriatic margin, Italy: Continental Shelf Research, v. 27, i. 3–4, pp. 400-416, doi: 10.1016/j.csr.2005.09.009
Wheatcroft, R.A., Stevens, A.W., Hunt, L.M., Milligan, T.G., 2006, The large-scale distribution and internal geometry of the fall 2000 Po River flood deposit: Evidence from digital X-radiography: Continental Shelf Research, v. 26, i. 4, pp. 499-516, doi: 10.1016/j.csr.2006.01.002
Borgeld, J.C., and A.W. Stevens, 2005, Humboldt Bay, California, surface sediments 2000-01, in Schlosser, S.C., and R. Rasmussen, eds., Proceedings of the Humboldt Bay symposium; Current perspectives on the physical and biological processes of Humboldt Bay, p. 51-64
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 49
Bathymetry and topography data from the Elwha River delta, Washington, May 2011 Bathymetry and topography data from the Elwha River delta, Washington, May 2011
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry and topography data from the Elwha River delta, Washington, September 2010 Bathymetry and topography data from the Elwha River delta, Washington, September 2010
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, March 2013 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, March 2013
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, September 2013 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, September 2013
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, April and May 2014 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, April and May 2014
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Digital seafloor images and sediment grain size from the mouth of the Columbia River, Oregon and Washington, 2014 Digital seafloor images and sediment grain size from the mouth of the Columbia River, Oregon and Washington, 2014
Geo-referenced digital imagery of in-situ seafloor sediments in the mouth of the Columbia River was collected and analyzed to determine median grain size of the surface sediments. Digital imagery of the seafloor was collected with a flying eyeball (Rubin and others, 2007) from the R/V Parke Snavely from September 11 to September 13, 2014 (USGS Field Activity 2014-642-FA). The flying...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, September 2014 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, September 2014
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain size data from the Elwha River delta, Washington, January 2015 Bathymetry, topography, and sediment grain size data from the Elwha River delta, Washington, January 2015
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain size data from the Elwha River delta, Washington, July 2016 Bathymetry, topography, and sediment grain size data from the Elwha River delta, Washington, July 2016
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, July 2015 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, July 2015
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, February 2016 Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, February 2016
Two dams on the Elwha River, Washington State, USA trapped over 20 million cubic meters of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a...
Digital Elevation Model of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015 Digital Elevation Model of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015
This USGS Data Release presents data collected from bathymetric and topographic surveys and the resulting digital elevation model for the Little Holland Tract in the Sacramento-San Joaquin River Delta, California. During May and June of 2015, a team of scientists from the USGS Pacific Coastal and Marine Science Center (PCMSC) conducted multiple surveys (USGS Field Activity 2015-642-FA)...
Filter Total Items: 49
No results found.
Filter Total Items: 43
Evaluation of a Single-Beam Sonar System to Map Seagrass at Two Sites in Northern Puget Sound, Washington Evaluation of a Single-Beam Sonar System to Map Seagrass at Two Sites in Northern Puget Sound, Washington
Seagrass at two sites in northern Puget Sound, Possession Point and nearby Browns Bay, was mapped using both a single-beam sonar and underwater video camera. The acoustic and underwater video data were compared to evaluate the accuracy of acoustic estimates of seagrass cover. The accuracy of the acoustic method was calculated for three classifications of seagrass observed in underwater...
Authors
Andrew W. Stevens, Jessica Lacy, David Finlayson, Guy Gelfenbaum
Bathymetry, substrate and circulation in Westcott Bay, San Juan Islands, Washington Bathymetry, substrate and circulation in Westcott Bay, San Juan Islands, Washington
Nearshore bathymetry, substrate type, and circulation patterns in Westcott Bay, San Juan Islands, Washington, were mapped using two acoustic sonar systems, video and direct sampling of seafloor sediments. The goal of the project was to characterize nearshore habitat and conditions influencing eelgrass (Z. marina) where extensive loss has occurred since 1995. A principal hypothesis for...
Authors
Eric E. Grossman, Andrew Stevens, Chris Curran, Collin Smith, Andrew Schwartz
Nearshore circulation and water-column properties in the Skagit River Delta, northern Puget Sound, Washington: Juvenile Chinook Salmon habitat availability in the Swinomish Channel Nearshore circulation and water-column properties in the Skagit River Delta, northern Puget Sound, Washington: Juvenile Chinook Salmon habitat availability in the Swinomish Channel
Time-series and spatial measurements of nearshore hydrodynamic processes and water properties were made in the Swinomish Channel to quantify the net direction and rates of surface water transport that influence habitat for juvenile Chinook salmon along their primary migratory corridor between the Skagit River and Padilla Bay in northern Puget Sound, Washington. During the spring...
Authors
Eric E. Grossman, Andrew Stevens, Guy Gelfenbaum, Christopher Curran
In situ time-series measurements of subseafloor sediment properties In situ time-series measurements of subseafloor sediment properties
The capabilities and diversity of subsurface sediment sensors lags significantly from what is available for the water column, thereby limiting progress in understanding time-dependent seabed exchange and high-frequency acoustics. To help redress this imbalance, a new instrument, the autonomous sediment profiler (ASP), is described herein. ASP consists of a four-electrode, Wenner-type...
Authors
R. Wheatcroft, A.W. Stevens, R.V. Johnson
Beach morphology monitoring in the Elwha River Littoral Cell, 2004-2009 Beach morphology monitoring in the Elwha River Littoral Cell, 2004-2009
This report describes the methods used, data collected, and results of the Beach Morphology Monitoring Program in the Elwha River Littoral Cell, starting in 2004. The U.S. Geological Survey and the Washington State Department of Ecology collaborated in the data collection with the support of the local Lower Elwha Klallam Tribe. Beach monitoring efforts consisted of collecting topographic...
Authors
Jonathon Warrick, Douglas George, Andrew W. Stevens, Jodi Eshleman, Guy Gelfenbaum, George Kaminsky, Andrew Schwartz, Matt Bierne
Mississippi delta mudflow activity and 2005 gulf hurricanes Mississippi delta mudflow activity and 2005 gulf hurricanes
[No abstract available]
Authors
J.P. Walsh, D.R. Corbett, D. Mallinson, M. Goni, M. Dail, C. Loewy, K. Marciniak, K. Ryan, C. Smith, A. Stevens, B. Summers, T. Test
Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling
Continual sediment accumulation in Capitol Lake since the damming of the Deschutes River in 1951 has altered the initial morphology of the basin. As part of the Deschutes River Estuary Feasibility Study (DEFS), the United States Geological Survey (USGS) was tasked to model how tidal and storm processes will influence the river, lake and lower Budd Inlet should estuary restoration occur
Authors
Douglas George, Guy Gelfenbaum, Giles Lesser, Andrew W. Stevens
Non-USGS Publications**
Stevens, A.W. , Wheatcroft, R.A., Wiberg, P.L., 2007, Seabed properties and sediment erodibility along the western Adriatic margin, Italy: Continental Shelf Research, v. 27, i. 3–4, pp. 400-416, doi: 10.1016/j.csr.2005.09.009
Wheatcroft, R.A., Stevens, A.W., Hunt, L.M., Milligan, T.G., 2006, The large-scale distribution and internal geometry of the fall 2000 Po River flood deposit: Evidence from digital X-radiography: Continental Shelf Research, v. 26, i. 4, pp. 499-516, doi: 10.1016/j.csr.2006.01.002
Borgeld, J.C., and A.W. Stevens, 2005, Humboldt Bay, California, surface sediments 2000-01, in Schlosser, S.C., and R. Rasmussen, eds., Proceedings of the Humboldt Bay symposium; Current perspectives on the physical and biological processes of Humboldt Bay, p. 51-64
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.