An integrated approach to conjunctive-use analysis with the one-water hydrologic flow model, MODFLOW-OWHM
Scott Boyce, Randall T. Hanson
2015, Conference Paper, Proceedings: MODFLOW and more 2015: Modeling a complex world
The MODFLOW-2005 (MF) family of hydrologic simulators has diverged into multiple versions designed for specific needs, thus limiting their use to their respective designs. The One-Water Hydrologic Flow Model (MF-OWHM v1.0) is an integrated hydrologic flow model that is an enhanced fusion of multiple MF versions. While maintaining compatibility with...
Episodic deflation-inflation events at Kīlauea Volcano and implications for the shallow magma system
Kyle R. Anderson, Michael P. Poland, Jessica H. Johnson, Asta Miklius
Rebecca Carey, Valerie Cayol, Michael P. Poland, Dominique Weis, editor(s)
2015, Book chapter, Hawaiian volcanoes: From source to surface
Episodic variations in magma pressures and flow rates at Kīlauea Volcano, defined by a characteristic temporal evolution and termed deflation-inflation (DI) events, have been observed since at least the 1990s. DI events consist of transient, days-long deflations and subsequent reinflations of the summit region, accompanied since 2008 by fluctuations in...
REE enrichment in granite-derived regolith deposits of the southeast United States: Prospective source rocks and accumulation processes
Nora K. Foley, Robert A. Ayuso
G.J. Simandl, M. Neetz, editor(s)
2015, Conference Paper, Symposium on strategic and critical materials proceedings (British Columbia Geological Survey Paper 2015-3)
The Southeastern United States contains numerous anorogenic, or A-type, granites, which constitute promising source rocks for REE-enriched ion adsorption clay deposits due to their inherently high concentrations of REE. These granites have undergone a long history of chemical weathering, resulting in thick granite-derived regoliths, akin to those of South China,...
Status and trends in the Lake Superior fish community, 2014
Mark R. Vinson, Lori M. Evrard, Owen T. Gorman, Daniel L. Yule
2015, Report, Compiled reports to the Great Lakes Fishery Commission of the annual bottom trawl and acoustics surveys, 2014
In 2014, the Lake Superior fish community was sampled with daytime bottom trawls at 73 nearshore and 30 offshore stations. Spring and summer water temperatures were the coldest measured for the period of records for the surveys. In the nearshore zone, a total of 15,372 individuals from 28 species or...
Lake formation, characteristics and evolution in retroarc deposystems: A synthesis of data from the modern Andean orogen and its associated basins
Andrew S. Cohen, Michael M. McGlue, Geoffrey S. Ellis, Hiran Zani, Peter W. Swarzenski, Mario L. Assine, Aguinaldo Silva
Peter G. DeCelles, Mihai N. Ducea, Barbara Carrapa, Paul Kapp, editor(s)
2015, Book chapter, Geodynamic of a cordilleran orogenic system: The central Andes of Argentina and northern Chile
Lake deposystems are commonly associated with retroarc mountain belts in the geological record. These deposystems are poorly characterized in modern retroarcs, placing limits on our ability to interpret environmental signals from ancient deposits. To address this problem, we have synthesized our existing knowledge about the distribution, morphometrics, and sedimentary geochemical...
Drought monitoring and assessment: Remote sensing and modeling approaches for the Famine Early Warning Systems Network
Gabriel B. Senay, Naga Manohar Velpuri, Stefanie Bohms, Michael Budde, Claudia Young, James Rowland, James Verdin
2015, Book chapter
Drought monitoring is an essential component of drought risk management. It is usually carried out using drought indices/indicators that are continuous functions of rainfall and other hydrometeorological variables. This chapter presents a few examples of how remote sensing and hydrologic modeling techniques are being used to generate a suite of...
Reticulite‐producing fountains from ring fractures in Kīlauea Caldera ca. 1500 CE
Michael May, Rebecca J. Carey, Don Swanson, Bruce F. Houghton
Rebecca Carey, Valerie Cayol, Michael P. Poland, Dominique Weis, editor(s)
2015, Book chapter, Hawaiian volcanoes: From source to surface
A widely dispersed reticulite bed occurs close to the base of the Keanakākoʻi Tephra at Kīlauea Volcano. It can be divided into six subunits in the northern sector of the volcano; the reticulite also occurs in the southern sector, but outcrops are sparse owing to penecontemporaneous erosion and burial. Multilobate isopachs for...
Using the Maxent program for species distribution modelling to assess invasion risk
Catherine S. Jarnevich, Nicholas E. Young
R.C Venette, editor(s)
2015, Book chapter, Pest Risk Modelling and Mapping for Invasive Alien Species
MAXENT is a software package used to relate known species occurrences to information describing the environment, such as climate, topography, anthropogenic features or soil data, and forecast the presence or absence of a species at unsampled locations. This particular method is one of the most popular species distribution modelling techniques...
Historic and Contemporary Status of Sea Otters in the North Pacific
James L. Bodkin
Shawn E. Larson, Arthur Gross, Glenn R. VanBlaricom, editor(s)
2015, Book chapter, Sea Otter Conservation
Similar to other species that in recent centuries experienced unregulated human exploitation, sea otters were extirpated throughout large portions of their historic range in the North Pacific. For most of the twentieth century, with cessation of the fur trade and because of concerted efforts at conservation, sea otters recovered much...
Carbon isotope analysis of dissolved organic carbon in fresh and saline (NaCl) water via continuous flow cavity ring-down spectroscopy following wet chemical oxidation
Christopher H. Conaway, Randal B. Thomas, Nabil Saad, James J. Thordsen, Yousif K. Kharaka
2015, Isotopes in Environmental and Health Studies (51) 344-358
This work examines the performance and limitations of a wet chemical oxidation carbon analyser interfaced with a cavity ring-down spectrometer (WCO-CRDS) in a continuous flow (CF) configuration for measuring δ13C of dissolved organic carbon (δ13C-DOC) in natural water samples. Low-chloride matrix (<5 g Cl/L) DOC solutions were analysed with as little as...
The Yellowstone “hot spot” track results from migrating basin-range extension
Gillian R. Foulger, Robert L. Christiansen, Don L. Anderson
Gillian R. Foulger, Michele Lustrino, Scott D. King, editor(s)
2015, Book chapter, The interdisciplinary earth: A volume in honor of Don L. Anderson (GSA Special Papers volume 514)
Whether the volcanism of the Columbia River Plateau, eastern Snake River Plain, and Yellowstone (western U.S.) is related to a mantle plume or to plate tectonic processes is a long-standing controversy. There are many geological mismatches with the basic plume model as well as logical flaws, such as citing data...
Onset of a basaltic explosive eruption from Kīlauea’s summit in 2008
Rebecca J. Carey, Lauren Swavely, Don Swanson, Bruce F. Houghton, Tim R. Orr, Tamar Elias, Andrew Sutton
Rebecca Carey, Valerie Cayol, Michael P. Poland, Dominique Weis, editor(s)
2015, Book chapter, Hawaiian volcanoes: From source to surface
The onset of a basaltic eruption at the summit of Kīlauea volcano in 2008 is recorded in the products generated during the first three weeks of the eruption and suggests an evolution of both the physical properties of the magma and also lava lake levels and vent wall stability. Ash...
Mobilization of microspheres from a fractured soil during intermittent infiltration events
Sanjay Mohanty, Mark Bulicek, David W. Metge, Ronald W. Harvey, Joseph N. Ryan, Alexandria B. Boehm
2015, Vadose Zone Journal (14)
Pathogens or biocolloids mobilized in the vadose zone may consequently contaminate groundwater. We found that microspheres were mobilized from a fractured soil during intermittent rainfall and the mobilization was greater when the microsphere size was larger and when the soil had greater water permeability.The vadose zone filters pathogenic microbes from...
River corridor science: Hydrologic exchange and ecological consequences from bedforms to basins
Judson Harvey, Michael Gooseff
2015, Water Resources Research (51) 6893-6922
Previously regarded as the passive drains of watersheds, over the past 50 years, rivers have progressively been recognized as being actively connected with off-channel environments. These connections prolong physical storage and enhance reactive processing to alter water chemistry and downstream transport of materials and energy. Here we propose river corridor...
Management applications of discontinuity theory
David G. Angeler, Craig R. Allen, Chris Barichievy, Tarsha Eason, Ahjond S. Garmestani, Nicholas A.J. Graham, Dean Granholm, Lance H. Gunderson, Melinda Knutson, Kirsty L. Nash, R. John Nelson, Magnus Nystrom, Trisha Spanbauer, Craig A. Stow, Shana M. Sundstrom
2015, Journal of Applied Ecology (53) 688-698
Human impacts on the environment are multifaceted and can occur across distinct spatiotemporal scales. Ecological responses to environmental change are therefore difficult to predict, and entail large degrees of uncertainty. Such uncertainty requires robust tools for management to sustain ecosystem goods and services and maintain resilient ecosystems.We...
High-speed limnology: Using advanced sensors to investigate spatial variability in biogeochemistry and hydrology
John T. Crawford, Luke C. Loken, Nora J. Casson, Colin Smith, Amanda G. Stone, Luke A. Winslow
2015, Environmental Science & Technology (49) 442-450
Advanced sensor technology is widely used in aquatic monitoring and research. Most applications focus on temporal variability, whereas spatial variability has been challenging to document. We assess the capability of water chemistry sensors embedded in a high-speed water intake system to document spatial variability. This new sensor platform continuously samples...
Twentieth-century shifts in forest structure in California: Denser forests, smaller trees, and increased dominance of oaks
Patrick J. McIntyre, James H. Thorne, Christopher R. Dolanc, Alan L. Flint, Lorraine E. Flint, Maggi Kelly, David D. Ackerly
2015, Proceedings of the National Academy of Sciences (112) 1458-1463
We document changes in forest structure between historical(1930s) and contemporary (2000s) surveys of California vegetation through comparisons of tree abundance and size across the state and within several ecoregions. Across California, tree density in forested regions increased by 30% between the two time periods, whereas forest biomass in the same...
Study 8: Prevalence and load of Nanophyetus salmincola infection in outmigrating steelhead trout from five Puget Sound rivers
M.F. Chen, B.A. Stewart, Kevin Senkvik, Paul Hershberger
2015, Book chapter, Puget Sound steelhead marine survival: 2013-2015 research findings summary
Nanophyetus salmincola is a parasitic trematode, or flatworm, that infects salmonid fishes in the Pacific Northwest, including Washington, Oregon, and portions of California. The adult worm lives in the intestine of fish-eating birds and mammals. Eggs shed into the water hatch into miracidia which penetrate the first intermediate host, one...
Effects of rapid urbanization on streamflow, erosion, and sedimentation in a desert stream in the American Southwest
John W. Whitney, Patrick A. Glancy, Susan E. Buckingham, Arthur C. Ehrenberg
2015, Anthropocene (10) 29-42
Rapid urbanization has resulted in a series of sequential effects on a desert stream in the American Southwest. Lower Las Vegas Wash was a dry wash characterized by infrequent flood deposition when Las Vegas, Nevada was established in 1905. Wastewater effluent was discharged into the wash in low volumes for...
Synthesis of current knowledge on post-fire seeding for soil stabilization and invasive species control
Jan L. Beyers, David A. Pyke, Troy Wirth
2015, Report
The General Accounting Office has identified a need for better information on the effectiveness of post-fire emergency stabilization and rehabilitation methods used by the U.S. Forest Service and Department of Interior (DOI) agencies. Since reviews were published on treatment effectiveness in the early 2000s, treatment choices have changed and increased...
Relationships among seismic velocity, metamorphism, and seismic and aseismic fault slip in the Salton Sea Geothermal Field region
Jeffrey J. McGuire, Rowena B. Lohman, Rufus D. Catchings, Michael J. Rymer, Mark R. Goldman
2015, Journal of Geophysical Research (120) 2600-2615
The Salton Sea Geothermal Field is one of the most geothermally and seismically active areas in California and presents an opportunity to study the effect of high-temperature metamorphism on the properties of seismogenic faults. The area includes numerous active tectonic faults that have recently been imaged with active source seismic...
Denitrification in the Mississippi River network controlled by flow through river bedforms
Jesus D. Gomez-Velez, Judson W. Harvey, M. Bayani Cardenas, Brian Kiel
2015, Nature Geoscience (8) 941-945
Increasing nitrogen concentrations in the world’s major rivers have led to over-fertilization of sensitive downstream waters. Flow through channel bed and bank sediments acts to remove riverine nitrogen through microbe-mediated denitrification reactions. However, little is understood about where in the channel network this biophysical process is most efficient, why certain...
Climate change and vulnerability of bull trout (Salvelinus confluentus) in a fire-prone landscape.
Jeffrey A. Falke, Rebecca L. Flitcroft, Jason B. Dunham, Kristina M. McNyset, Paul F. Hessburg, Gordon H. Reeves
2015, Canadian Journal of Fisheries and Aquatic Sciences (72) 304-318
Linked atmospheric and wildfire changes will complicate future management of native coldwater fishes in fire-prone landscapes, and new approaches to management that incorporate uncertainty are needed to address this challenge. We used a Bayesian network (BN) approach to evaluate population vulnerability of...
Implementation of a framework for multi-species, multi-objective adaptive management in Delaware Bay
Conor P. McGowan, David R. Smith, James D. Nichols, James E. Lyons, John A. Sweka, Kevin Kalasz, Lawrence J. Niles, Richard Wong, Jeffrey Brust, Michelle C. Davis, Braddock Spear
2015, Biological Conservation (191) 759-769
Decision analytic approaches have been widely recommended as well suited to solving disputed and ecologically complex natural resource management problems with multiple objectives and high uncertainty. However, the difference between theory and practice is substantial, as there are very few actual resource management programs that represent formal applications of decision...
Analyzing high resolution topography for advancing the understanding of mass and energy transfer through landscapes: A review
Paola Passaiacquaa, Patrick Belmont, Dennis M. Staley, Jeffery Simley, J. Ramon Arrowsmith, Collin A. Bode, Christopher Crosby, Stephen DeLong, Nancy Glenn, Sara Kelly, Dimitri Lague, Harish Sangireddy, Keelin Schaffrath, David Tarboton, Thad Wasklewicz, Joseph Wheaton
2015, Earth-Science Reviews (148) 174-193
The study of mass and energy transfer across landscapes has recently evolved to comprehensive considerations acknowledging the role of biota and humans as geomorphic agents, as well as the importance of small-scale landscape features. A contributing and supporting factor to this evolution is the emergence over the last two...
