Characterizing submarine ground‐water discharge using fiber‐optic distributed temperature sensing and marine electrical resistivity
Rory Henderson, Frederick D. Day-Lewis, John W. Lane Jr., Charles F. Harvey, Lanbo Liu
2008, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008
Submarine ground‐water discharge (SGD) contributes important solute fluxes to coastal waters. Pollutants are transported to coastal ecosystems by SGD at spatially and temporally variable rates. New approaches are needed to characterize the effects of storm‐event, tidal, and seasonal forcing on SGD. Here, we evaluate the utility of two geophysical methods‐fiber‐optic...
Estimation of bedrock depth using the horizontal‐to‐vertical (H/V) ambient‐noise seismic method
John W. Lane Jr., Eric A. White, Gregory V. Steele, James C. Cannia
2008, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008
Estimating sediment thickness and the geometry of the bedrock surface is a key component of many hydrogeologic studies. The horizontal‐to‐vertical (H/V) ambient‐noise seismic method is a novel, non‐invasive technique that can be used to rapidly estimate the depth to bedrock. The H/V method uses a single, broad‐band three‐component seismometer to...
Levee evaluation using MASW: Preliminary findings from the Citrus Lakefront Levee, New Orleans, Louisiana
John W. Lane Jr., Julian M. Ivanov, Frederick D. Day-Lewis, Drew Clemens, Robert Patev, Richard D. Miller
2008, Conference Paper
The utility of the multi‐channel analysis of surface waves (MASW) seismic method for non‐invasive assessment of earthen levees was evaluated for a section of the Citrus Lakefront Levee, New Orleans, Louisiana. This test was conducted after the New Orleans' area levee system had been stressed by Hurricane Katrina in 2005....
Application of RHIZON samplers to obtain high-resolution pore-fluid records during geochemical investigations of gas hydrate systems
John W. Pohlman, M Riedel, William F. Waite, K. Rose, L. Lapham
2008, Fire in the Ice: NETL Methane Hydrate Newsletter (8) 16-17
Obtaining accurate, high-resolution profiles of pore fluid constituents is critical for characterizing the subsurface geochemistry of hydrate-bearing sediments. Tightly-constrained downcore profiles provide clues about fluid sources, fluid flow, and the milieu of chemical and diagenetic reactions, all of which are used to interpret where and why gas and gas hydrate...
The desperate dozen: Fishes on the brink
Stuart A. Welsh
2008, Report
IT IS NO SECRET THAT OUR NATIVE AQUATIC ANIMALS ARE IN DECLINE. There are currently 582 species of animals on the Federal list of endangered and threatened species, 268 of these (46%) are found in freshwater habitats. Of the amazing assemblage of 675 fishes found in southeastern waters, more than...
Instream flow assessment of streams draining the Arbuckle-Simpson Aquifer
Titus S. Seilheimer, William L. Fisher
2008, Report
The availability of high quality water is critical to both humans and ecosystems. A recent proposal was made by rapidly expanding municipalities in central Oklahoma to begin transferring groundwater from the Arbuckle-Simpson aquifer, a sensitive sole-source aquifer in south-central Oklahoma. Concerned citizens and municipalities living on and getting their drinking...
Microhabitat use by brook trout inhabiting small tributaries and a large river main stem: Implications for stream habitat restoration in the central Appalachians
Jeff L. Hansbarger, J. Todd Petty, Patricia M. Mazik
2008, Proceedings of the Southeastern Association of Fish and Wildlife Agencies (62) 142-148
Brook trout (Salvelinus fontinalis) habitat restoration is needed across a range of stream sizes; however, studies quantifying brook trout habitat preferences in streams of differing sizes are rare. We used radio-telemetry to quantify adult brook trout microhabitat use in a central Appalachian watershed, the upper Shavers Fork of the Cheat...
Fiber‐optic distributed temperature sensing: A new tool for assessment and monitoring of hydrologic processes
John W. Lane Jr., Frederick D. Day-Lewis, Carole D. Johnson, Cian B. Dawson, David L. Nelms, Cheryl A. Eddy-Miller, Jerrod D. Wheeler, Charles F. Harvey, Hanan N. Karam
2008, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008
Fiber‐optic distributed temperature sensing (FO DTS) is an emerging technology for characterizing and monitoring a wide range of important earth processes. FO DTS utilizes laser light to measure temperature along the entire length of standard telecommunications optical fibers. The technology can measure temperature every meter over FO cables up to...
Decreased abundance of crustose coralline algae due to ocean acidification
Ilsa B. Kuffner, Andreas J Andersson, Paul L. Jokiel, Ku'ulei S. Rodgers, Fred T. Mackenzie
2008, Nature Geoscience (1) 114-117
Owing to anthropogenic emissions, atmospheric concentrations of carbon dioxide could almost double between 2006 and 2100 according to business-as-usual carbon dioxide emission scenarios1. Because the ocean absorbs carbon dioxide from the atmosphere2, 3, 4, increasing atmospheric carbon dioxide concentrations will lead to increasing dissolved inorganic carbon and carbon...
Rivers and streams: Ecosystem dynamics and integrating paradigms
K.W. Cummins, M.A. Wilzbach
2008, Book chapter, Encyclopedia of ecology
Full understanding of running waters requires an ecosystem perspective, which encompasses the physical and chemical setting in interaction with dependent biological communities. Several conceptual models or paradigms of river and stream ecosystems that capture critical components of lotic ecosystems have been developed, including the ‘river continuum concept’, to describe fluxes...
Development of a model to assess ground-water availability in California's Central Valley
Claudia C. Faunt, Randall T. Hanson, Kenneth Belitz
2008, Water Resources Impact (10) 27-30
No abstract available....
Application of MODFLOW’s farm process to California’s Central Valley
Claudia C. Faunt, Randall T. Hanson, Wolfgang Schmid, Kenneth Belitz
2008, Conference Paper, California Central Valley Groundwater Modeling Workshop, Proceedings
Historically, California’s Central Valley has been one of the most productive agricultural regions in the world. The Central Valley also is rapidly becoming an important area for California’s expanding urban population. During 1980–2007, the population nearly doubled in the Central Valley, increasing the competition for water. Because of the importance...
Effects of 2003 wildfires on stream chemistry in Glacier National Park, Montana
M. Alisa Mast, David W. Clow
2008, Hydrological Processes (22) 5013-5023
Changes in stream chemistry were studied for 4 years following large wildfires that burned in Glacier National Park during the summer of 2003. Burned and unburned drainages were monitored from December 2003 through August 2007 for streamflow, major constituents, nutrients, and suspended sediment following the fires. Stream-water nitrate concentrations showed...
At-sea distribution of satellite-tracked grey-faced petrels, Pterodroma macroptera gouldi, captured on the Ruamaahua (Aldermen) Islands, New Zealand
Catriona MacLeod, Josh Adams, Phil Lyver
2008, Papers and Proceedings Royal Society of Tasmania (142) 73-88
We used satellite telemetry to determine the at-sea distribution of 32 adult (non-breeders and failed breeders) Grey-faced Petrels, Pterodroma macroptera gouldi, during July-October in 2006 and 2007. Adults captured at breeding colonies on the Ruamaahua (Aldermen) Islands ranged across the southwestern Pacific Ocean and Tasman Sea between 20-49°S and 142°E...
How temperature affects juvenile coho salmon
Mary Ann Madej
2008, Endangered Species Bulletin (33) 38-39
Water temperature influences many aspects of a salmon’s life cycle, including egg development, juvenile appetite and growth, migration, and distribution. Coho salmon (Oncorhynchus kisutch), like most salmonids, need cool water for rearing, and they typically reside in a stream for a minimum of one year after hatching. Historically, coho were...
Status of the desert tortoise in Red Rock Canyon State Park
Kristin H. Berry, Kevin Keith, Tracy Y. Bailey
2008, California Fish and Game (94) 98-118
We surveyed for desert tortoises, Gopherus agassizii, in the western part of Red Rock Canyon State Park and watershed in eastern Kern County, California, between 2002 and 2004. We used two techniques: a single demographic plot (~4 km2 ) and 37 landscape plots (1-ha each). We estimated population densities of...
When desert tortoises are rare: Testing a new protocol for assessing status
Kevin Keith, Kristin H. Berry, James F. Weigand
2008, California Fish and Game (94) 75-97
We developed and tested a new protocol for sampling populations of the desert tortoise, Gopherus agassizii, a state- and federally listed species, in areas where population densities are very low, historical data are sparse, and anthropogenic uses may threaten the well-being of tortoise populations and habitat. We conducted a 3-year...
Ecosystem conceptual model- Mercury
Charles N. Alpers, Collin A. Eagles-Smith, Chris Foe, Susan Klasing, Mark C. Marvin-DiPasquale, Darell Slotton, Lisamarie Windham-Myers
2008, Report, Sacramento-San Joaquin Delta Regional Ecosystem Restoration Implementation Plan
Mercury has been identified as an important contaminant in the Delta, based on elevated concentrations of methylmercury (a toxic, organic form that readily bioaccumulates) in fish and wildlife. There are health risks associated with human exposure to methylmercury by consumption of sport fish, particularly top predators such as bass species....
Monitoring lingering oil from the Exxon Valdez spill on Gulf of Alaska armored beaches and mussel beds sixteen years post-spill
G.V. Irvine, D.H. Mann, J.W. Short
2008, Report, TOXLINE
Final Rept. ; Prepared in Cooperation With Alaska Univ., Fairbanks. Inst. of Arctic Biology. Sponsored By National Marine Fisheries Service, Juneau, Ak. AlaskaFisheries Science Center. ; Stranded Exxon Valdez Oil Has Persisted for 16 Years At Boulder-Armored Beach Sites Along National Park Coastlines Bordering the Gulf of Alaska. These Sites Are Up to...
Baseline studies in the Elwha River ecosystem prior to dam removal: Introduction to the special issue
Jeffrey J. Duda, Jerry Freilich, Edward G. Schreiner
2008, Northwest Science (82) 1-12
The planned removal of two dams that have been in place for over 95 years on the Elwha River provides a unique opportunity to study dam removal effects. Among the largest dams ever considered for removal, this project is compelling because 83% of the watershed lies undisturbed in Olympic National...
Reevaluation of the macroseismic effects of the 1887 Sonora, Mexico earthquake and its magnitude estimation
Gerardo Suarez, Susan E. Hough
2008, Geo-UNAM : boletín informativo del área de ciencias de la tierra 1-15
The Sonora, Mexico, earthquake of 3 May 1887 occurred a few years before the start of the instrumental era in seismology. We revisit all available accounts of the earthquake and assign Modified Mercalli Intensities (MMI), interpreting and analyzing macroseismic information using the best available modern methods. We find that earlier...
Reply to comment by T. N. Narasimhan on “A method to estimate groundwater depletion from confining layers”
Christopher E. Neuzil, Leonard F. Konikow
2008, Water Resources Research (44)
We thank T. N. Narasimhan for his comment on our paper [Konikow and Neuzil, 2007] and for extending the discussion with a historical perspective, additional examples, and some considerations we did not discuss, including implications for water management. We support and agree with the thrust of his comments....
Avoidance behavior of juvenile lake sturgeon (Acipenser fulvescens) exposed to Bayluscide 3.2% Granular Sea Lamprey Larvicide
Michael A Boogaard, Jane E Rivera, Mark P Gaikowski
2008, Report
Avoidance of juvenile lake sturgeons < 100 mm in length in response to application of the Bayluscide 3.2% Granular Sea Lamprey Larvicide was assessed. Clear plexiglas columns (107 cm in height, 30.5 cm in diameter) to evaluate the potential for the normally bottom-dwelling fishes to move vertically in the water...
A linear geospatial streamflow modeling system for data sparse environments
Kwabena O. Asante, Guleid A. Arlan, Md Shahriar Pervez, James Rowland
2008, International Journal of River Basin Management (6) 233-241
In many river basins around the world, inaccessibility of flow data is a major obstacle to water resource studies and operational monitoring. This paper describes a geospatial streamflow modeling system which is parameterized with global terrain, soils and land cover data and run operationally with satellite‐derived precipitation and evapotranspiration datasets....
CO2‐induced suppression of transpiration cannot explain increasing runoff
Thomas G. Huntington
2008, Hydrological Processes (22) 311-314
No abstract available....
