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...
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...
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...
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....
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...
Sub-tidal benthic habitats of central San Francisco Bay and offshore Golden Gate area: A review
H. Gary Greene, Charles Endris, Tracy Vallier, Nadine E. Golden, Jeffery Cross, Holly F. Ryan, Bryan Dieter, Eric Niven
P.L. Barnard, B.E. Jaffe, D. H. Schoellhamer, editor(s)
2013, Marine Geology (345) 31-46
Deep-water potential estuarine and marine benthic habitat types were defined from a variety of new and interpreted data sets in central San Francisco Bay and offshore Golden Gate area including multibeam echosounder (MBES), side-scan sonar and bottom grab samples. Potential estuarine benthic habitats identified for the first time range from...
A step decrease in sediment concentration in a highly modified tidal river delta following the 1983 El Niño floods
Erin L. Hestir, David H. Schoellhamer, Tara Morgan-King, Susan L. Ustin
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 304-313
Anthropogenic activities in watersheds can have profound effects on sediment transport through river systems to estuaries. Disturbance in a watershed combined with alterations to the hydro-climatologic regime may result in changes to the sediment flux, and exacerbate the impacts of extreme events (such as large-magnitude floods) on sediment transport. In...
Characterization of gas hydrate reservoirs by integration of core and log data in the Ulleung Basin, East Sea
J.-J. Bahk, G.-Y. Kim, J.-H. Chun, J.-H. Kim, J.Y. Lee, B.-J. Ryu, J.-H. Lee, B.-K. Son, Timothy S. Collett
2013, Marine and Petroleum Geology (47) 30-42
Examinations of core and well-log data from the Second Ulleung Basin Gas Hydrate Drilling Expedition (UBGH2) drill sites suggest that Sites UBGH2-2_2 and UBGH2-6 have relatively good gas hydrate reservoir quality in terms of individual and total cumulative thicknesses of gas-hydrate-bearing sand (HYBS) beds. In both of the sites, core...
Sediment transport in the San Francisco Bay Coastal System: An overview
Patrick L. Barnard, David H. Schoellhamer, Bruce E. Jaffe, Lester J. McKee
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 3-17
The papers in this special issue feature state-of-the-art approaches to understanding the physical processes related to sediment transport and geomorphology of complex coastal-estuarine systems. Here we focus on the San Francisco Bay Coastal System, extending from the lower San Joaquin-Sacramento Delta, through the Bay, and along the adjacent outer Pacific...
Distribution of biologic, anthropogenic, and volcanic constituents as a proxy for sediment transport in the San Francisco Bay Coastal System
Mary McGann, Li H. Erikson, Elmira Wan, Charles L. Powell II, Rosalie F. Maddocks
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 113-142
Although conventional sediment parameters (mean grain size, sorting, and skewness) and provenance have typically been used to infer sediment transport pathways, most freshwater, brackish, and marine environments are also characterized by abundant sediment constituents of biological, and possibly anthropogenic and volcanic, origin that can provide additional insight into local sedimentary...
Measuring suspended sediment
J. R. Gray, M. N. Landers
2013, Book chapter, Comprehensive water quality and purification
Suspended sediment in streams and rivers can be measured using traditional instruments and techniques and (or) surrogate technologies. The former, as described herein, consists primarily of both manually deployed isokinetic samplers and their deployment protocols developed by the Federal Interagency Sedimentation Project. They are used on all continents other than...
A 600-ka Arctic sea-ice record from Mendeleev Ridge based on ostracodes
Thomas M. Cronin, L.V. Polyak, D. Reed, E. S. Kandiano, R. E. Marzen, E. A. Council
2013, Quaternary Science Reviews (79) 157-167
Arctic paleoceanography and sea-ice history were reconstructed from epipelagic and benthic ostracodes from a sediment core (HLY0503-06JPC, 800 m water depth) located on the Mendeleev Ridge, Western Arctic Ocean. The calcareous microfaunal record (ostracodes and foraminifers) covers several glacial/interglacial cycles back to estimated Marine Isotope Stage 13 (MIS 13, ∼500 ka) with...
Climate change and watershed mercury export: a multiple projection and model analysis
Heather E. Golden, Christopher D. Knightes, Paul Conrads, Toby D. Feaster, Gary M. Davis, Stephen T. Benedict, Paul M. Bradley
2013, Environmental Toxicology and Chemistry (32) 2165-2174
Future shifts in climatic conditions may impact watershed mercury (Hg) dynamics and transport. An ensemble of watershed models was applied in the present study to simulate and evaluate the responses of hydrological and total Hg (THg) fluxes from the landscape to the watershed outlet and in-stream THg concentrations to contrasting...
Human-induced stream channel abandonment/capture and filling of floodplain channels within the Atchafalaya River Basin, Louisiana
Daniel E. Kroes, Thomas F. Kraemer
2013, Geomorphology (201) 148-156
The Atchafalaya River Basin is a distributary system of the Mississippi River containing the largest riparian area in the lower Mississippi River Valley and the largest remaining forested bottomland in North America. Reductions in the area of open water in the Atchafalaya have been occurring over the last 100 years,...
Seasonal variations in suspended-sediment dynamics in the tidal reach of an estuarine tributary
Maureen A. Downing-Kunz, David H. Schoellhamer
Patrick L. Barnard, Bruce E. Jaffe, David H. Schoellhamer, editor(s)
2013, Marine Geology (345) 314-326
Quantifying sediment supply from estuarine tributaries is an important component of developing a sediment budget, and common techniques for estimating supply are based on gages located above tidal influence. However, tidal interactions near tributary mouths can affect the magnitude and direction of sediment supply to the open waters of the...
Population-level thermal performance of a cold-water ectotherm is linked to ontogeny and local environmental heterogeneity
Blake R. Hossack, Windsor H. Lowe, Mariah J. Talbott, P. Stephen Corn, Kevin M. Kappenman, Molly A. H. Webb
2013, Freshwater Biology (58) 2215-2225
Negative effects of global warming are predicted to be most severe for species that occupy a narrow range of temperatures, have limited dispersal abilities or have long generation times. These are characteristics typical of many species that occupy small, cold streams.Habitat use, vulnerabilities and mechanisms for coping with local...
A sediment budget for the southern reach in San Francisco Bay, CA: Implications for habitat restoration
Gregory Shellenbarger, Scott Wright, David H. Schoellhamer
2013, Marine Geology (345) 281-293
The South Bay Salt Pond Restoration Project is overseeing the restoration of about 6000 ha of former commercial salt-evaporation ponds to tidal marsh and managed wetlands in the southern reach of San Francisco Bay (SFB). As a result of regional groundwater overdrafts prior to the 1970s, parts of the project...
The timing of sediment transport down Monterey Submarine Canyon, offshore California
Thomas Stevens, Charles K. Paull, William Ussler, Mary McGann, Jan-Pieter Buylaert, Eve M. Lundsten
2013, Geological Society of America Bulletin (126) 103-121
While submarine canyons are the major conduits through which sediments are transported from the continents out into the deep sea, the time it takes for sediment to pass down through a submarine canyon system is poorly constrained. Here we report on the first study to couple optically stimulated luminescence (OSL)...
Global carbon dioxide emissions from inland waters
Peter A. Raymond, Jens Hartmann, Ronny Lauerwald, Sebastian Sobek, Cory P. McDonald, Mark Hoover, David Butman, Robert G. Striegl, Emilio Mayorga, Christoph Humborg, Pirkko Kortelainen, Hans H. Durr, Michel Meybeck, Philippe Ciais, Peter Guth
2013, Nature (503) 355-359
Carbon dioxide (CO2) transfer from inland waters to the atmosphere, known as CO2 evasion, is a component of the global carbon cycle. Global estimates of CO2 evasion have been hampered, however, by the lack of a framework for estimating the inland water surface area and gas transfer velocity and by the absence...
DOM composition in an agricultural watershed: assessing patterns and variability in the context of spatial scales
Peter J. Hernes, Robert G. M. Spencer, Rachel Y. Dyda, Brian A. Pellerin, Philip A. M. Bachand, Brian A. Bergamaschi
2013, Geochimica et Cosmochimica Acta (121) 599-610
Willow Slough, a seasonally irrigated agricultural watershed in the Sacramento River valley, California, was sampled synoptically in order to investigate the extent to which dissolved organic carbon (DOC) concentrations and compositions from throughout the catchment are represented at the mouth. DOC concentrations ranged from 1.8 to 13.9 mg L−1, with the lowest...
Restoring the Great Lakes: DOI stories of success and partnership in implementing the Great Lakes Restoration Initiative
U.S. Department of the Interior, U.S. Fish and Wildlife Service, National Park Service, Water Resources Division, U.S. Geological Survey, Bureau of Indian Affairs
2013, Report
The Great Lakes are a monumentally unique national treasure containing nearly ninety-five percent of the United States' fresh surface water. Formed by receding glaciers, the Great Lakes support a thriving, resilient ecosystem rich with fish, wildlife, and abundant natural resources. The Great Lakes also support an array of commercial uses,...
Refinement of regression models to estimate real-time concentrations of contaminants in the Menomonee River drainage basin, southeast Wisconsin, 2008-11
Austin K. Baldwin, Dale M. Robertson, David A. Saad, Christopher Magruder
2013, Scientific Investigations Report 2013-5174
In 2008, the U.S. Geological Survey and the Milwaukee Metropolitan Sewerage District initiated a study to develop regression models to estimate real-time concentrations and loads of chloride, suspended solids, phosphorus, and bacteria in streams near Milwaukee, Wisconsin. To collect monitoring data for calibration of models, water-quality sensors and automated samplers...
Groundwater and surface-water interaction within the upper Smith River Watershed, Montana 2006-2010
Rodney R. Caldwell, Cheryl A. Eddy-Miller
2013, Scientific Investigations Report 2013-5051
The 125-mile long Smith River, a tributary of the Missouri River, is highly valued as an agricultural resource and for its many recreational uses. During a drought starting in about 1999, streamflow was insufficient to meet all of the irrigation demands, much less maintain streamflow needed for boating and viable...
Evidence for 20th century climate warming and wetland drying in the North American Prairie Pothole Region
B. A. Werner, W. Carter Johnson, Glenn R. Guntenspergen
2013, Ecology and Evolution (3) 3471-3482
The Prairie Pothole Region (PPR) of North America is a globally important resource that provides abundant and valuable ecosystem goods and services in the form of biodiversity, groundwater recharge, water purification, flood attenuation, and water and forage for agriculture. Numerous studies have found these wetlands, which number in the millions,...
