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: 40
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, August 2012
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 delta system
Bathymetry and topography data from the Elwha River delta, Washington, May 2012
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 delta system
Bathymetry and topography data from the Elwha River delta, Washington, August 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 delta system
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 delta system
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 delta system
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 delta system
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 delta system
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 delta system
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 eyeball consis
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 delta system
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 delta system
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 delta system
Filter Total Items: 42
No results found.
Filter Total Items: 34
The Limit of Inundation of the September 29, 2009, Tsunami on Tutuila, American Samoa
U.S. Geological Survey scientists investigated the coastal impacts of the September 29, 2009, South Pacific tsunami in Tutuila, American Samoa in October and November 2009, including mapping the alongshore variation in the limit of inundation. Knowing the inundation limit is useful for planning safer coastal development and evacuation routes for future tsunamis and for improving models of tsunami
Authors
Bruce E. Jaffe, Guy Gelfenbaum, Mark L. Buckley, Steve Watt, Alex Apotsos, Andrew W. Stevens, Bruce M. Richmond
Detection and characterization of benthic filamentous algal stands (Cladophora sp.) on rocky substrata using a high-frequency echosounder
A high-frequency echosounder was used to detect and characterize percent cover and stand height of the benthic filamentous green alga Cladophora sp. on rocky substratum of the Laurentian Great Lakes. Comparisons between in situ observations and estimates of the algal stand characteristics (percent cover, stand height) derived from the acoustic data show good agreement for algal stands that exceede
Authors
David C. Depew, Andrew W. Stevens, Ralph E.H. Smith, Robert E. Hecky
Incorporation of Fine-Grained Sediment Erodibility Measurements into Sediment Transport Modeling, Capitol Lake, Washington
Capitol Lake was created in 1951 with the construction of a concrete dam and control gate that prevented salt-water intrusion into the newly formed lake and regulated flow of the Deschutes River into southern Puget Sound. Physical processes associated with the former tidally dominated estuary were altered, and the dam structure itself likely caused an increase in retention of sediment flowing into
Authors
Andrew W. Stevens, Guy Gelfenbaum, Edwin Elias, Craig Jones
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 video: bare
Authors
Andrew W. Stevens, Jessica R. Lacy, David P. Finlayson, Guy Gelfenbaum
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 the loss of
Authors
Eric E. Grossman, Andrew W. 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
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 outmigration of Sk
Authors
Eric E. Grossman, Andrew W. Stevens, Guy Gelfenbaum, Christopher Curran
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 and bathy
Authors
Jonathon A. Warrick, Douglas A. George, Andrew W. Stevens, Jodi Eshleman, Guy Gelfenbaum, George M. Kaminsky, Andrew K. Schwartz, Matt Bierne
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 resistivity p
Authors
R. A. Wheatcroft, A.W. Stevens, R.V. Johnson
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. Understand
Authors
Douglas A. George, Guy Gelfenbaum, Giles Lesser, Andrew W. Stevens
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
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.
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Filter Total Items: 40
Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, August 2012
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 delta systemBathymetry and topography data from the Elwha River delta, Washington, May 2012
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 delta systemBathymetry and topography data from the Elwha River delta, Washington, August 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 delta systemBathymetry 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 delta systemBathymetry 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 delta systemBathymetry, 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 delta systemBathymetry, 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 delta systemBathymetry, 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 delta systemDigital 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 eyeball consisBathymetry, 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 delta systemBathymetry, 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 delta systemBathymetry, 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 delta system - Multimedia
Filter Total Items: 42No results found.
- Publications
Filter Total Items: 34
The Limit of Inundation of the September 29, 2009, Tsunami on Tutuila, American Samoa
U.S. Geological Survey scientists investigated the coastal impacts of the September 29, 2009, South Pacific tsunami in Tutuila, American Samoa in October and November 2009, including mapping the alongshore variation in the limit of inundation. Knowing the inundation limit is useful for planning safer coastal development and evacuation routes for future tsunamis and for improving models of tsunamiAuthorsBruce E. Jaffe, Guy Gelfenbaum, Mark L. Buckley, Steve Watt, Alex Apotsos, Andrew W. Stevens, Bruce M. RichmondDetection and characterization of benthic filamentous algal stands (Cladophora sp.) on rocky substrata using a high-frequency echosounder
A high-frequency echosounder was used to detect and characterize percent cover and stand height of the benthic filamentous green alga Cladophora sp. on rocky substratum of the Laurentian Great Lakes. Comparisons between in situ observations and estimates of the algal stand characteristics (percent cover, stand height) derived from the acoustic data show good agreement for algal stands that exceedeAuthorsDavid C. Depew, Andrew W. Stevens, Ralph E.H. Smith, Robert E. HeckyIncorporation of Fine-Grained Sediment Erodibility Measurements into Sediment Transport Modeling, Capitol Lake, Washington
Capitol Lake was created in 1951 with the construction of a concrete dam and control gate that prevented salt-water intrusion into the newly formed lake and regulated flow of the Deschutes River into southern Puget Sound. Physical processes associated with the former tidally dominated estuary were altered, and the dam structure itself likely caused an increase in retention of sediment flowing intoAuthorsAndrew W. Stevens, Guy Gelfenbaum, Edwin Elias, Craig JonesEvaluation 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 video: bareAuthorsAndrew W. Stevens, Jessica R. Lacy, David P. Finlayson, Guy GelfenbaumBathymetry, 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 the loss ofAuthorsEric E. Grossman, Andrew W. Stevens, Chris Curran, Collin Smith, Andrew SchwartzNearshore 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 outmigration of SkAuthorsEric E. Grossman, Andrew W. Stevens, Guy Gelfenbaum, Christopher CurranBeach 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 and bathyAuthorsJonathon A. Warrick, Douglas A. George, Andrew W. Stevens, Jodi Eshleman, Guy Gelfenbaum, George M. Kaminsky, Andrew K. Schwartz, Matt BierneIn 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 resistivity pAuthorsR. A. Wheatcroft, A.W. Stevens, R.V. JohnsonDeschutes 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. UnderstandAuthorsDouglas A. George, Guy Gelfenbaum, Giles Lesser, Andrew W. StevensMississippi delta mudflow activity and 2005 gulf hurricanes
[No abstract available]AuthorsJ.P. Walsh, D.R. Corbett, D. Mallinson, M. Goni, M. Dail, C. Loewy, K. Marciniak, K. Ryan, C. Smith, A. Stevens, B. Summers, T. TestNon-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.2005.09.009Wheatcroft, 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.2006.01.002Borgeld, 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.
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