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Eric Grossman

Research Geologist with the USGS Pacific Coastal and Marine Science Center

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High coastal arctic bluff with broken chunks, some that are ready to fall into the crashing waves, and some that have fallen.

Coastal Climate Impacts

The impacts of climate change and sea-level rise around the Pacific and Arctic Oceans can vary tremendously. Thus far the vast majority of national and international impact assessments and models of coastal climate change have focused on low-relief coastlines that are not near seismically active zones. Furthermore, the degree to which extreme waves and wind will add further stress to coastal...
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
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Coastal Climate Impacts

The impacts of climate change and sea-level rise around the Pacific and Arctic Oceans can vary tremendously. Thus far the vast majority of national and international impact assessments and models of coastal climate change have focused on low-relief coastlines that are not near seismically active zones. Furthermore, the degree to which extreme waves and wind will add further stress to coastal...
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Aerial photograph of a wetland area, with waterways, islands, peninsulas, and a town visible.

Coastal Habitats in Puget Sound

A Pacific Northwest icon, Puget Sound is the second-largest estuary in the United States. Its unique geology, climate, and nutrient-rich waters produce and sustain biologically productive coastal habitats. These same natural characteristics also contribute to a high quality of life that has led to growth in human population and urbanization. This growth has played a role in degrading the Sound...
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Washington Water Science Center
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Coastal Habitats in Puget Sound

A Pacific Northwest icon, Puget Sound is the second-largest estuary in the United States. Its unique geology, climate, and nutrient-rich waters produce and sustain biologically productive coastal habitats. These same natural characteristics also contribute to a high quality of life that has led to growth in human population and urbanization. This growth has played a role in degrading the Sound...
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Satellite image of study area, showing forests, a bay or inlet, and estuaries and rivers.

PS-CoSMoS: Puget Sound Coastal Storm Modeling System

The CoSMoS model is currently available for most of the California coast and is now being expanded to support the 4.5 million coastal residents of the Puget Sound region, with emphasis on the communities bordering the sound.
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
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PS-CoSMoS: Puget Sound Coastal Storm Modeling System

The CoSMoS model is currently available for most of the California coast and is now being expanded to support the 4.5 million coastal residents of the Puget Sound region, with emphasis on the communities bordering the sound.
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Beach seine Bainbridge Island

Puget Sound Priority Ecosystems Science

Puget Sound Priority Ecosystem Science (PES) supports interdisciplinary ecological research in the Puget Sound, Washington, watershed and nearshore.
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
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Puget Sound Priority Ecosystems Science

Puget Sound Priority Ecosystem Science (PES) supports interdisciplinary ecological research in the Puget Sound, Washington, watershed and nearshore.
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Illustration showing an oblique view of the Puget Sound watershed.

Estuaries and large river deltas in the Pacific Northwest

Essential habitat for wild salmon and other wildlife borders river deltas and estuaries in the Pacific Northwest. These estuaries also support industry, agriculture, and a large human population that’s expected to double by the year 2060, but each could suffer from more severe river floods, higher sea level, and storm surges caused by climate change.
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
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Estuaries and large river deltas in the Pacific Northwest

Essential habitat for wild salmon and other wildlife borders river deltas and estuaries in the Pacific Northwest. These estuaries also support industry, agriculture, and a large human population that’s expected to double by the year 2060, but each could suffer from more severe river floods, higher sea level, and storm surges caused by climate change.
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View from up high above a flat beach area lots of rocks and boulders, very little wave action.

Using Video Imagery to Study Coastal Change: Whidbey Island

From May of 2018 through November of 2019, USGS scientists collected imagery from video cameras overlooking the coast along a beach on Whidbey Island, Island County at the northern boundary of Puget Sound in western Washington.
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
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Using Video Imagery to Study Coastal Change: Whidbey Island

From May of 2018 through November of 2019, USGS scientists collected imagery from video cameras overlooking the coast along a beach on Whidbey Island, Island County at the northern boundary of Puget Sound in western Washington.
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Person walking through tall grasses in marsh landscape, carrying field equipment of their shoulder

Assessing the Benefits and Vulnerability of Current and Future Potential Ecosystem Services of the Nisqually River Delta and other Puget Sound Estuaries

The Nisqually River Delta represents the largest wetland restoration in the Pacific Northwest. The restoration resulted in a 50% increase in potential salt marsh habitat. The Delta supports threatened salmon fisheries, large populations of migratory birds, and provides unique opportunities for recreation. The Delta also provides multiple ecosystem services, which are the benefits that wildlife or
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Climate Adaptation Science Centers
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Assessing the Benefits and Vulnerability of Current and Future Potential Ecosystem Services of the Nisqually River Delta and other Puget Sound Estuaries

The Nisqually River Delta represents the largest wetland restoration in the Pacific Northwest. The restoration resulted in a 50% increase in potential salt marsh habitat. The Delta supports threatened salmon fisheries, large populations of migratory birds, and provides unique opportunities for recreation. The Delta also provides multiple ecosystem services, which are the benefits that wildlife or
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Graphic of waves breaking at the ocean surface with lettering below it for the coastal storm modeling system.

PS-CoSMoS FAQs

Puget Sound - Coastal Storm Modeling System (PS-CoSMoS) frequently asked questions

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PS-CoSMoS FAQs

Puget Sound - Coastal Storm Modeling System (PS-CoSMoS) frequently asked questions

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Tidal marsh, Pacific Northwest

Understanding the Interactions Between Human Health, Environment, and Climate in Salish Sea Communities

The overarching project goal was to develop overlapping conceptual models of environmental and community health indicators in reference to climate forecasts. The sensitivity of species and habitats to climate was cross-walked with recently developed Coast Salish community health indicators (e.g., ceremonial use, knowledge exchange, and physiological well-being) in order to demonstrate how Indigeno
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Climate Adaptation Science Centers
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Understanding the Interactions Between Human Health, Environment, and Climate in Salish Sea Communities

The overarching project goal was to develop overlapping conceptual models of environmental and community health indicators in reference to climate forecasts. The sensitivity of species and habitats to climate was cross-walked with recently developed Coast Salish community health indicators (e.g., ceremonial use, knowledge exchange, and physiological well-being) in order to demonstrate how Indigeno
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Model input and projections of compound floodwater depths for the lower Nooksack River and delta, western Washington State

Model input and computed flood depths associated with the combined influence of sea level position, tides, storm surge, and streamflow under existing conditions and projected future higher sea level and peak stream runoff are provided for the lower (Reach 1) of the Nooksack River and delta in Whatcom County, western Washington State. The flood-depth projection data are provided in a series of rast
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Pacific Coastal and Marine Science Center

Oceanographic and water-quality measurements collected in Bellingham Bay, Washington, USA, 2019 to 2021

Bottom-landing and floating platforms with instrumentation to measure currents, waves, water level, optical turbidity, water temperature, and conductivity were deployed at four locations in Bellingham Bay, Washington, USA. Platforms were deployed during three separate periods: July 30, 2019-November 14, 2019; November 19, 2019-February 5, 2020; and January 22, 2021-April 13, 2021. Additionally, wa
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Pacific Coastal and Marine Science Center

Geochemistry of surface sediment and sediment cores in Bellingham Bay, Whatcom County, Washington, in February 2020

Geochemical data are reported for surface sediments and long sediment cores from Bellingham Bay, Whatcom County, Washington, collected in early February 2020 after flood conditions on the Nooksack River. Data include total organic carbon content (TOC), carbonate content (CaCO3), ratios of stable carbon 13/12 isotopes (d13C), ratios of total carbon to total nitrogen (C:N), short-lived cosmogenic ra
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Pacific Coastal and Marine Science Center

Projected future habitat, elevation change, and carbon accumulation of coastal wetlands in the Nisqually River Delta, Washington

This dataset consists of raster geotiff outputs from modeling habitat change, marsh vertical accretion, and carbon accumulation in the Nisqually River Delta, Washington, USA. These rasters represent projections of future habitat type, change in surface elevation above Mean Sea Level, and total sediment carbon accumulation since 2011 in coastal wetland habitats. Projections were generated in 20-yea
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Western Geographic Science Center

Time-series measurements of pressure, conductivity, temperature, and water level collected in Puget Sound and Bellingham Bay, Washington, USA, 2018 to 2021

Pressure, conductivity, temperature, and water level relative the North American Vertical Datum of 1988 (NAVD88) were measured at seven locations in Puget Sound and Bellingham Bay, Washington, USA, from November 2, 2018 to June 4, 2021. These data were collected using submersible pressure-conductivity-temperature sensors mounted on piers to support studies of extreme water levels and flooding haza
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Eelgrass distributions and bathymetry of Bellingham Bay, Washington, 2019

This data release presents eelgrass distributions and bathymetry data derived from acoustic surveys of Bellingham Bay, Washington. Survey operations were conducted between February 16 and February 21, 2019 (USGS Field Activity Number 2019-606-FA) by a team of scientists from the U.S. Geological Survey Pacific Coastal and Marine Science Center and Washington State Department of Ecology. Eelgrass an
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Aerial imagery and structure-from-motion data products from UAS survey of the intertidal zone at Lone Tree Point, Kiket Bay, WA, June 2019

An unmanned aerial system (UAS) was used to acquire high-resolution imagery of the intertidal zone at Lone Tree Point, Kiket Bay, Washington on June 5, 2019. This imagery was processed using structure-from-motion (SfM) photogrammetric techniques to derive a high-resolution digital surface model (DSM), orthomosaic imagery, and topographic point clouds. In order to maximize the extent of the suba
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Aerial imagery and structure-from-motion data products from UAS survey of the intertidal zone at West Whidbey Island, WA, June 2019

An unmanned aerial system (UAS) was used to acquire high-resolution imagery of the intertidal zone at West Whidbey Island, Washington on June 4, 2019. This imagery was processed using structure-from-motion (SfM) photogrammetric techniques to derive a high-resolution digital surface model (DSM), orthomosaic imagery, and topographic point clouds. In order to maximize the extent of the subaerially
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Topobathymetric Model of the Strait of Juan de Fuca, 1891 to 2016

To support the modeling of storm-induced flooding, the U.S. Geological Survey (USGS) Coastal National Elevation Database (CoNED) Applications Project has created an integrated 1-meter topobathymetric digital elevation model (TBDEM) for the Strait of Juan de Fuca, which is located at the outlet of the Salish Sea. The international boundary between Canada and the northwestern part of the United Stat
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Pacific Coastal and Marine Science Center

Aerial imagery and structure-from-motion data products from UAS survey of the intertidal zone at Puget Creek and Dickman Mill Park, Ruston Way, Tacoma, WA, June 2019

An unmanned aerial system (UAS) was used to acquire high-resolution imagery of the intertidal zone at Puget Creek and Dickman Mill Park in Tacoma, Washington on June 3, 2019. This imagery was processed using structure-from-motion (SfM) photogrammetric techniques to derive high-resolution digital surface models (DSM), orthomosaic imagery, and topographic point clouds. In order to maximize the exte
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Aerial imagery and structure-from-motion data products from UAS survey of the intertidal zone at Post Point, Bellingham Bay, WA, June 2019

An unmanned aerial system (UAS) was used to acquire high-resolution imagery of the intertidal zone at Post Point in Bellingham Bay, Washington on June 6, 2019. This imagery was processed using structure-from-motion (SfM) photogrammetric techniques to derive high-resolution digital surface models (DSM), orthomosaic imagery, and topographic point clouds. In order to maximize the extent of the suba
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Eelgrass distributions and bathymetry of the Nisqually River delta, Washington

This data release presents eelgrass distributions and bathymetric data from repeated surveys performed on the Nisqually River delta to document interannual changes in eelgrass abundance and coastal morphology following the removal of dikes in 2009 that restored tidal processes to over 300 ha of former freshwater wetlands. Survey operations were conducted by a team of scientists from the U.S. Geolo
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Pacific Coastal and Marine Science Center
Wet sand on a beach has a little shallow water with rocks and boulders, coastal cliffs in background.
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Filter Total Items: 37

Compound flood model for the lower Nooksack River and delta, western Washington—Assessment of vulnerability and nature-based adaptation opportunities to mitigate higher sea level and stream flooding

Higher sea level and stream runoff associated with climate change is expected to lead to greater lowland flooding across the Pacific Northwest. Increases in stream runoff that range from 20 to 32 percent by the 2040s and from 52 to 72 percent by the 2080s is expected to steadily increase flood risk. Flood risk is also expected to increase in response to the landward shift in high tides and storm s
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Eric E. Grossman, Nathan R. vanArendonk, Kees Nederhoff
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Pacific Coastal and Marine Science Center

Fluvial delivery and wave resuspension of sediment in a sheltered, urbanized Pacific Northwest estuary

The sequence and timing of sediment delivery and redistribution in coastal systems is important for shoreline stability, ecosystem services, and remediation planning. In temperate estuaries, understanding the role of fluvial sediment delivery and dispersal relative to wind and wave remobilization processes is particularly important to address the fate of contaminants, many of which adsorb to fine
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Daniel J. Nowacki, Andrew W. Stevens, Renee K. Takesue, Eric E. Grossman
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Pacific Coastal and Marine Science Center

Assessment of vulnerabilities and opportunities to restore marsh sediment supply at Nisqually River Delta, west-central Washington

A cascading set of hazards to coastal environments is intimately tied to sediment transport and includes the flooding and erosion of shorelines and habitats that support communities, industry, infrastructure, and ecosystem functions (for example, habitats critical to fisheries). This report summarizes modeling and measurement data used to evaluate the sediment budget of the Nisqually River Delta,
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Eric E. Grossman, Sean C. Crosby, Andrew W. Stevens, Daniel J. Nowacki, Nathan R. vanArendonk, Christopher A. Curran
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Pacific Coastal and Marine Science Center

Can coastal habitats rise to the challenge? Resilience of estuarine habitats, carbon accumulation, and economic value to sea-level rise in a Puget Sound estuary

Sea-level rise (SLR) and obstructions to sediment delivery pose challenges to the persistence of estuarine habitats and the ecosystem services they provide. Restoration actions and sediment management strategies may help mitigate such challenges by encouraging the vertical accretion of sediment in and horizontal migration of tidal forests and marshes. We used a process-based soil accretion model (
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Monica Mei Jeen Moritsch, Kristin B. Byrd, Melanie J. Davis, Anthony J. Good, Judith Z. Drexler, James T. Morris, Isa Woo, Lisamarie Windham-Myers, Eric E. Grossman, Glynnis Nakai, Katrina L. Poppe, John M. Rybczyk
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Ecosystems Mission Area, Water Resources Mission Area, Land Management Research Program, Science and Decisions Center, California Water Science Center, Pacific Coastal and Marine Science Center, Western Ecological Research Center (WERC), Western Geographic Science Center

Long-term changes in kelp forests in an inner basin of the Salish Sea

Kelp forests form an important biogenic habitat that responds to natural and human drivers. Global concerns exist about threats to kelp forests, yet long-term information is limited and research suggests that trends are geographically distinct. We examined distribution of the bull kelp Nereocystis luetkeana over 145 years in South Puget Sound (SPS), a semi-protected inner basin in a fjord estuary
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H.D. Berry, T.F. Mumford, M. Calloway, L. Ferrier, B. Christiaen, Nathan R. vanArendonk, Eric E. Grossman, P. Dowty
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Nearshore water quality and coral health indicators along the west coast of the Island of Hawaiʻi, 2010–2014

Coral reefs worldwide are experiencing rapid degradation in response to climate and land-use change, namely effects of warming sea-surface temperatures, contaminant runoff, and overfishing. Extensive coral bleaching caused by the steady rise of sea-surface temperatures is projected to increase, but our understanding and ability to predict where corals may be most resilient to this effect is limite
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Eric E. Grossman, Lisa Marrack, Nathan R. vanArendonk
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Sediment export and impacts associated with river delta channelization compound estuary vulnerability to sea-level rise, Skagit River Delta, Washington, USA

Improved understanding of the budget and retention of sediment in river deltas is becoming increasingly important to mitigate and plan for impacts expected with sea level rise. In this study, analyses of historical bathymetric change, sediment core stratigraphy, and modeling are used to evaluate the sediment budget and environmental response of the largest river delta in the U.S. Pacific Northwest
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Eric E. Grossman, Andrew W. Stevens, Peter Dartnell, Doug A George, David Finlayson
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Distribution and transport of Olympia oyster, Ostrea lurida, larvae in northern Puget Sound, Washington, USA

As efforts for restoring Olympia oyster (Ostrea lurida) populations have expanded, there is an increased need to understand local factors that could influence the long-term success of these projects. To address concerns over potential limitations to recruitment at a restoration site in northern Puget Sound, Washington, USA, a study was developed to characterize physical processes governing larval
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S.K. Grossman, Eric E. Grossman, Julie S. Barber, S.K. Gamblewood, Sean C. Crosby
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Sediment transport in a restored, river-influenced Pacific Northwest estuary

Predicting the success of future investments in coastal and estuarine ecosystem restorations is limited by scarce data quantifying sediment budgets and transport processes of prior restorations. This study provides detailed analyses of the hydrodynamics and sediment fluxes of a recently restored U.S. Pacific Northwest estuary, a 61 ha former agricultural area near the mouth of the Stillaguamish Ri

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Daniel J. Nowacki, Eric E. Grossman
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

Extreme coastal water level in Washington state: Guidance to support sea level rise planning

This document provides guidelines for assessing exposure to future coastal flooding during extreme coastal water level events – whether these are due to tides, surge, wave run-up, or, more likely, a combination of the three. These guidelines provide information about the current and future magnitude of extreme coastal water levels across Washington State and the underlying processes that influence
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I.M. Miller, Nathan R. vanArendonk, Eric E. Grossman
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Sediment storage and transport in the Nooksack River basin, northwestern Washington, 2006–15

The Nooksack River is a dynamic gravel-bedded river in northwestern Washington, draining off Mount Baker and the North Cascades into Puget Sound. Working in cooperation with the Whatcom County Flood Control Zone District, the U.S. Geological Survey studied topographic, hydrologic, and climatic data for the Nooksack River basin to document recent changes in sediment storage, long-term bed elevation
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Scott W. Anderson, Christopher P. Konrad, Eric E. Grossman, Christopher A. Curran
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Water Resources Mission Area, Washington Water Science Center

Juvenile Chinook salmon and forage fish use of eelgrass habitats in a diked and channelized Puget Sound River Delta

Eelgrass Zostera marina can form extensive meadows on Puget Sound river deltas. The extent to which these meadows provide critical rearing habitat for local estuarine fishes, especially out‐migrating juvenile salmon, is not well understood. Further, delta eelgrass has been impacted by diking and river channelization with unknown consequences for fish. We sampled fish in the Skagit River delta, Was
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Stephen P. Rubin, Michael C. Hayes, Eric E. Grossman
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Ecosystems Mission Area, Species Management Research Program, Pacific Coastal and Marine Science Center, Western Fisheries Research Center
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New Models Show Restoration Can Benefit Salmon While Reducing Flood Risks to Pacific Northwest River Deltas

Large river deltas in the Pacific Northwest—low-lying and already flood-prone—face a future marked by increasingly frequent and intense flooding as...

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Can Coastal Habitats Rise to the Challenge? Assessing Sediment Supply at Nisqually River Delta

New, integrated, multidisciplinary studies from USGS and partners characterize the importance of sediment supply to coastal resilience and ecosystem...

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Video cameras monitor coastal change on Whidbey Island, Washington

Video cameras installed by the USGS Remote Sensing Coastal Change project overlook the coast on Whidbey Island, Washington, about 25 miles north of...

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