Comparison of sediment supply to San Francisco Bay from watersheds draining the Bay Area and the Central Valley of California
L.J. McKee, M. Lewicki, David H. Schoellhamer, Neil K. Ganju
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 47-62
Quantifying suspended sediment loads is important for managing the world's estuaries in the context of navigation, pollutant transport, wetland restoration, and coastal erosion. To address these needs, a comprehensive analysis was completed on sediment supply to San Francisco Bay from fluvial sources. Suspended sediment, optical backscatter, velocity data near the...
Climate-change impacts on ecological systems: Introduction to a US assessment
Nancy B. Grimm, Michelle D Staudinger, Amanda Staudt, Shawn L. Carter, F. Stuart Chapin III, Peter Kareiva, Mary Ruckelshaus, Bruce A. Stein
2013, Frontiers in Ecology and the Environment (11) 456-464
As part of the 2014 US National Climate Assessment, over 60 subject‐matter experts from government agencies, academia, nongovernmental organizations, and the private sector assessed the current and projected impacts of climate change on ecosystems, biodiversity, and ecosystem services. Here, we introduce and provide context for the papers included in this...
Dredging and contaminant exposure to tree swallows nesting on the upper Mississippi River
Thomas W. Custer, Paul M. Dummer, Christine M. Custer, David Warburton
2013, Environmental Monitoring and Assessment (185) 9043-9053
n 2008 and 2009, dredge material from the Mississippi River in Pool 8 south of Brownsville, Minnesota was used to construct nearby islands. Chemical analysis of sediment in 2001 and 2002 in the area to be dredged indicated detectable concentrations of organic and inorganic contaminants. Tree swallows (Tachycineta bicolor), whose...
Identifying the dynamic characteristics of a dual core-wall and frame building in Chile using aftershocks of the 27 February 2010 (Mw=8.8) Maule, Chile, earthquake
Mehmet Çelebi, Mark Sereci, Ruben Boroschek, Rodrigo Carreno, Patricio Bonelli
2013, Earthquake Spectra (29) 1233-1254
Following the 27 February 2010 (Mw = 8.8) Offshore Maule, Chile earthquake, a temporary, 16-channel, real-time data streaming array was installed in a recently constructed building in Viña del Mar to capture its responses to aftershocks. The cast-in-place, reinforced concrete building is 16 stories high, with 3 additional basement levels,...
Influence of history and environment on the sediment dynamics of intertidal flats
Craig A. Jones, Bruce E. Jaffe
P.L. Barnard, B.E. Jaffe, D. H. Schoellhamer, editor(s)
2013, Marine Geology (345) 294-303
Morphological trends of three distinct intertidal environments in South San Francisco Bay were investigated using a combination of measurement and modeling tools. Because of the inherent relationship between the physical environment and the sediment properties, the sediment properties provide a good indicator of morphologic trends. A significant finding of this...
Seismic hazard from the Hispaniola subduction zone: correction to "Historical perspective on seismic hazard to Hispaniola and the northeast Caribbean region"
Uri S. ten Brink, William H. Bakun, Claudia H. Flores
2013, Journal of Geophysical Research B: Solid Earth (118) 5597-5600
No abstract available...
Does centennial morphodynamic evolution lead to higher channel efficiency in San Pablo Bay, California?
M. van der Wegen, Bruce E. Jaffe
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 254-265
Measured bathymetries on 30 year interval over the past 150 years show that San Pablo Bay experienced periods of considerable deposition followed by periods of net erosion. However, the main channel in San Pablo Bay has continuously narrowed. The underlying mechanisms and consequences of this tidal channel evolution are not...
Changes in surfzone morphodynamics driven by multi-decadal contraction of a large ebb-tidal delta
Jeff E. Hansen, Edwin Elias, Patrick L. Barnard
P.L. Barnard, B.E. Jaffe, D. H. Schoellhamer, editor(s)
2013, Marine Geology (345) 221-234
The impact of multi-decadal, large-scale deflation (76 million m3 of sediment loss) and contraction (~ 1 km) of a 150 km2 ebb-tidal delta on hydrodynamics and sediment transport at adjacent Ocean Beach in San Francisco, CA (USA), is examined using a coupled wave and circulation model. The model is forced...
Understanding processes controlling sediment transports at the mouth of a highly energetic inlet system (San Francisco Bay, CA)
Edwin P.L. Elias, Jeff E. Hansen
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 207-220
San Francisco Bay is one of the largest estuaries along the U.S. West Coast and is linked to the Pacific Ocean through the Golden Gate, a 100 m deep bedrock inlet. A coupled wave, flow and sediment transport model is used to quantify the sediment linkages between San Francisco Bay,...
Atmospheric deposition and critical loads for nitrogen and metals in Arctic Alaska: Review and current status
Greg L. Linder, William G. Brumbaugh, Peter Neitlich, Edward Little
2013, Open Journal of Air Pollution (2) 76-99
To protect important resources under their bureau’s purview, the United States National Park Service’s (NPS) Arctic Network (ARCN) has developed a series of “vital signs” that are to be periodically monitored. One of these vital signs focuses on wet and dry deposition of atmospheric chemicals and further, the establishment of...
Coastal processes influencing water quality at Great Lakes beaches
Water Resources Division, U.S. Geological Survey
2013, Fact Sheet 2013-3070
In a series of studies along the Great Lakes, U.S. Geological Survey scientists are examining the physical processes that influence concentrations of fecal indicator bacteria and related pathogens at recreational beaches. These studies aim to estimate human health risk, improve management strategies, and understand the fate and transport of microbes...
Research on pathogens at Great Lakes beaches: sampling, influential factors, and potential sources
Water Resources Division, U.S. Geological Survey
2013, Fact Sheet 2013-3071
The overall mission of this work is to provide science-based information and methods that will allow beach managers to more accurately make beach closure and advisory decisions, understand the sources and physical processes affecting beach contaminants, and understand how science-based information can be used to mitigate and restore beaches and...
Real-time assessments of water quality: expanding nowcasting throughout the Great Lakes
Water Resources Division, U.S. Geological Survey
2013, Fact Sheet 2013-3069
Nowcasts are systems that inform the public of current bacterial water-quality conditions at beaches on the basis of predictive models. During 2010–12, the U.S. Geological Survey (USGS) worked with 23 local and State agencies to improve existing operational beach nowcast systems at 4 beaches and expand the use of predictive...
Tools for beach health data management, data processing, and predictive model implementation
Water Resources Division, U.S. Geological Survey
2013, Fact Sheet 2013-3068
This fact sheet describes utilities created for management of recreational waters to provide efficient data management, data aggregation, and predictive modeling as well as a prototype geographic information system (GIS)-based tool for data visualization and summary. All of these utilities were developed to assist beach managers in making decisions to...
Sand sources and transport pathways for the San Francisco Bay coastal system, based on X-ray diffraction mineralogy
James R. Hein, Kira Mizell, Patrick L. Barnard
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 154-169
The mineralogical compositions of 119 samples collected from throughout the San Francisco Bay coastal system, including bayfloor and seafloor, area beaches, cliff outcrops, and major drainages, were determined using X-ray diffraction (XRD). Comparison of the mineral concentrations and application of statistical cluster analysis of XRD spectra allowed for the determination...
Scientific results of the Second Gas Hydrate Drilling Expedition in the Ulleung Basin (UBGH2)
Byong-Jae Ryu, Timothy S. Collett, Michael Riedel, Gil-Young Kim, Jong-Hwa Chun, Jang-Jun Bahk, Joo Yong Lee, Ji-Hoon Kim, Dong-Geun Yoo
2013, Marine and Petroleum Geology (47) 1-20
As a part of Korean National Gas Hydrate Program, the Second Ulleung Basin Gas Hydrate Drilling Expedition (UBGH2) was conducted from 9 July to 30 September, 2010 in the Ulleung Basin, East Sea, offshore Korea using the D/V Fugro Synergy. The UBGH2 was performed to understand the distribution of gas...
Scale-dependent gas hydrate saturation estimates in sand reservoirs in the Ulleung Basin, East Sea of Korea
Myung Woong Lee, Timothy S. Collett
2013, Marine and Petroleum Geology (47) 195-203
Through the use of 2-D and 3-D seismic data, several gas hydrate prospects were identified in the Ulleung Basin, East Sea of Korea and thirteen drill sites were established and logging-while-drilling (LWD) data were acquired from each site in 2010. Sites UBGH2–6 and UBGH2–10 were selected to test a series...
A Sr-Nd isotopic study of sand-sized sediment provenance and transport for the San Francisco Bay coastal system
Robert J. Rosenbauer, Amy C. Foxgrover, James R. Hein, Peter W. Swarzenski
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 143-153
A diverse suite of geochemical tracers, including 87Sr/86Sr and 143Nd/144Nd isotope ratios, the rare earth elements (REEs), and select trace elements were used to determine sand-sized sediment provenance and transport pathways within the San Francisco Bay coastal system. This study complements a large interdisciplinary effort (Barnard et al., 2012) that...
Forest ecosystems: Vegetation, disturbance, and economics
Jeremy S. Littell, Jeffrey A. Hicke, Sarah L. Shafer, Susan M. Capalbo, Laurie L. Houston, Patty Glick
2013, Book chapter, Climate change in the northwest: Implications for our landscapes, waters, and communities
Forests cover about 47% of the Northwest (NW–Washington, Oregon, and Idaho) (Smith et al. 2009, fig. 5.1, table 5.1). The impacts of current and future climate change on NW forest ecosystems are a product of the sensitivities of ecosystem processes to climate and the degree to which humans depend on...
Early and late Holocene glacial fluctuations and tephrostratigraphy, Cabin Lake, Alaska
Paul D. Zander, Darrell S. Kaufman, Stephen C. Kuehn, Kristi L. Wallace, R. Scott Anderson
2013, Journal of Quaternary (28) 761-771
Marked changes in sediment types deposited in Cabin Lake, near Cordova, Alaska, represent environmental shifts during the early and late Holocene, including fluctuations in the terminal position of Sheridan Glacier. Cabin Lake is situated to receive meltwater during periods when the outwash plain of the advancing Sheridan Glacier had aggraded....
Adjustment of the San Francisco estuary and watershed to decreasing sediment supply in the 20th century
David H. Schoellhamer, Scott Wright, Judith Z. Drexler
2013, Marine Geology (345) 63-71
The general progression of human land use is an initial disturbance (e.g., deforestation, mining, agricultural expansion, overgrazing, and urbanization) that creates a sediment pulse to an estuary followed by dams that reduce sediment supply. We present a conceptual model of the effects of increasing followed by decreasing sediment supply that...
Microbial source tracking as a tool for TMDL development, Little Blue River in Independence, Missouri
Eric D. Christensen, Rebecca N. Bushon, Amie M. G. Brady
2013, Book, Proceedings of the Water Environment Federation
The Little Blue River in Jackson County, Missouri has been listed by the Missouri Department of Natural Resources as impaired by bacteria for the protection of aquatic life and contact recreation from urban point and nonpoint sources. The Clean Water Act requires that a total maximum daily load (TMDL) for...
The use of modeling and suspended sediment concentration measurements for quantifying net suspended sediment transport through a large tidally dominated inlet
Li H. Erikson, Scott Wright, Edwin Elias, Daniel M. Hanes, David H. Schoellhamer, John Largier
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 96-112
Sediment exchange at large energetic inlets is often difficult to quantify due complex flows, massive amounts of water and sediment exchange, and environmental conditions limiting long-term data collection. In an effort to better quantify such exchange this study investigated the use of suspended sediment concentrations (SSC) measured at an offsite...
Large-scale depositional characteristics of the Ulleung Basin and its impact on electrical resistivity and Archie-parameters for gas hydrate saturation estimates
Michael Riedel, Timothy S. Collett, H.-S. Kim, J.-J. Bahk, J.-H. Kim, B.-J. Ryu, G.-Y. Kim
2013, Marine and Petroleum Geology (47) 222-235
Gas hydrate saturation estimates were obtained from an Archie-analysis of the Logging-While-Drilling (LWD) electrical resistivity logs under consideration of the regional geological framework of sediment deposition in the Ulleung Basin, East Sea, of Korea. Porosity was determined from the LWD bulk density log and core-derived values of grain density. In...
Adaptive harvest management for the Svalbard population of pink-footed geese: assessment for the 2013-2015 hunting seasons
Fred A. Johnson, Jesper Madsen
2013, Technical Report from DCE - Danish Centre for Environment and Energy 28
This report describes progress on the development of an adaptive harvestmanagement strategy for maintaining the Svalbard population of pink-footed geese near their agreed target level (60,000) by providing for sustainable harvests in Norway and Denmark. Specifically, this report provides an optimal harvest quota for the 2013-2015 hunting seasons and describes...
