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Scientific reports, journal articles, and information products produced by USGS Pacific Coastal and Marine Science Center scientists.
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Filter Total Items: 1422
An approach for modeling sediment budgets in supply-limited rivers An approach for modeling sediment budgets in supply-limited rivers
Reliable predictions of sediment transport and river morphology in response to variations in natural and human-induced drivers are necessary for river engineering and management. Because engineering and management applications may span a wide range of space and time scales, a broad spectrum of modeling approaches has been developed, ranging from suspended-sediment "rating curves" to...
Authors
Scott Wright, David J. Topping, David M. Rubin, Theodore S. Melis
Biogeochemical processes in an urban, restored wetland of San Francisco Bay, California, 2007-2009: Methods and data for plant, sediment and water parameters Biogeochemical processes in an urban, restored wetland of San Francisco Bay, California, 2007-2009: Methods and data for plant, sediment and water parameters
The restoration of 18 acres of historic tidal marsh at Crissy Field has had great success in terms of public outreach and visibility, but less success in terms of revegetated marsh sustainability. Native cordgrass (Spartina foliosa) has experienced dieback and has failed to recolonize following extended flooding events during unintended periodic closures of its inlet channel, which...
Authors
Lisamarie Windham-Myers, Mark C. Marvin-DiPasquale, Jennifer L. Agee, Le H. Kieu, Evangelos Kakouros, Li H. Erikson, Kristen Ward
Anthropogenic influence on recent bathymetric change in west-central San Francisco Bay Anthropogenic influence on recent bathymetric change in west-central San Francisco Bay
Two multibeam sonar surveys of west-central San Francisco Bay, California, were conducted in 1997 and 2008. Bathymetric change analysis between the two surveys indicates a loss of 14.1 million cubic meters (-3.1 cm/yr) of sediment during this time period, representing an approximately three-fold acceleration of the rate that was observed from prior depth change analysis from 1947 to 1979...
Authors
Patrick L. Barnard, Rikk G. Kvitek
Spotlight 6: Davidson seamount Spotlight 6: Davidson seamount
Davidson Seamount is located about 80 km off the central California coast in the Monterey Bay National Marine Sanctuary. It is one of the better-explored seamounts in the world, having been sampled and observed during 32 dives by the remotely operated vehicle (ROV) Tiburon. These dives mapped the bottom substrate and biological communities, and collected over 280 rock samples and nearly...
Authors
David A. Clague, L. Lundsten, James R. Hein, Jennifer B. Paduan, Alice Davis
Dramatic beach and nearshore morphological changes due to extreme flooding at a wave-dominated river mouth Dramatic beach and nearshore morphological changes due to extreme flooding at a wave-dominated river mouth
Record flooding on the Santa Clara River of California (USA) during January 2005 injected ∼ 5 million m3 of littoral-grade sediment into the Santa Barbara Littoral Cell, approximately an order of magnitude more than both the average annual river loads and the average annual alongshore littoral transport in this portion of the cell. This event appears to be the largest sediment transport...
Authors
P.L. Barnard, J.A. Warrick
Editorial: Exploring new frontiers with JGR–Solid Earth Editorial: Exploring new frontiers with JGR–Solid Earth
No abstract available.
Authors
Robert L. Nowack, Tom Parsons, Andre Revil
Introduction to surficial seafloor mapping and characterization Introduction to surficial seafloor mapping and characterization
No abstract available.
Authors
Peter Dartnell
Introduction to contaminant and biological implications Introduction to contaminant and biological implications
No abstract available.
Authors
Mary McGann
Introduction to the physical oceanography of the central Southern California Bight Introduction to the physical oceanography of the central Southern California Bight
No abstract available.
Authors
Marlene A. Noble
Knemidokoptic mange in Hawai`i `Amakihi (Hemignathus virens) on the island of Hawai`i Knemidokoptic mange in Hawai`i `Amakihi (Hemignathus virens) on the island of Hawai`i
Lesions resembling knemidokoptic mange on the feet and tarsometatarsi of two Hawai`i `Amakihi (Hemignathus virens) were observed while the researchers were mist-netting wild passerines at Manuka Natural Area Reserve on the island of Hawai`i between 14 June 2007 and 19 June 2007. During subsequent mist-netting from September 2007 through February 2008, we found 26% (7/27) of the Hawai`i...
Authors
Jacqueline Gaudioso, Dennis Lapointe, Patrick E. Hart
Coral proxy record of decadal-scale reduction in base flow from Moloka'i, Hawaii Coral proxy record of decadal-scale reduction in base flow from Moloka'i, Hawaii
Groundwater is a major resource in Hawaii and is the principal source of water for municipal, agricultural, and industrial use. With a growing population, a long-term downward trend in rainfall, and the need for proper groundwater management, a better understanding of the hydroclimatological system is essential. Proxy records from corals can supplement long-term observational networks...
Authors
Nancy G. Prouty, Stacy D. Jupiter, Michael E. Field, Malcolm T. McCulloch