Which geologic factors control permeability development in geothermal systems? The geologic structure of Dixie Valley
Drew L. Siler, Jonathan M. G. Glen
2018, Geothermal Resources Council Transactions (42)
Geothermal systems occur where subsurface permeability and temperature are sufficiently high to drive fluid circulation. In the Great Basin region of the United States, which hosts ~20% of domestic geothermal electricity generation capacity and much of the projected undeveloped and undiscovered resource, crustal heat flow is relatively high, so permeability...
New data yield new geologic insights at the Fallon FORGE site, Carson Sink Region, Nevada
Drew L. Siler, James E. Faulds, Jonathan M. G. Glen, Jeffrey B. Witter
2018, Geothermal Resources Council Transactions (42)
The geologic structure beneath the Fallon Frontier Observatory for Research in Geothermal Energy (FORGE) site represents a record of the Mesozoic through Cenozoic tectonism, volcanism, and sedimentation that has affected the Carson Sink local to Fallon, NV. A robust dataset confirms that the lithologic sequence consists of Quaternary through Miocene...
2D and 3D potential field mapping and modelling at the Fallon FORGE site, Nevada, USA
Jeffrey B. Witter, Jonathan M. G. Glen, Drew L. Siler, Dominique Fournier
2018, Geothermal Resources Council Transactions (42)
Accurate geological characterization of Fallon FORGE is important for preparing the site as an EGS laboratory. As part of this effort, a 3D geologic map was constructed previously from well logs, surface geologic mapping, 2D seismic profiles, interpreted gravity & magnetic maps, and a gravity-inferred basement surface. In this study,...
Quantifying uncertainty in Sr/Ca-based estimates of SST from the coral Orbicella faveolata
Jennifer A. Flannery, Julie N. Richey, Lauren T. Toth, Ilsa B. Kuffner, Richard Z. Poore
2018, Paleoceanography and Paleoclimatology (33) 958-973
The strontium to calcium ratio (Sr/Ca) in aragonitic skeletons of massive corals provides a proxy for sea surface temperature (SST) that can be used to reconstruct paleoclimates across decades, centuries, and, potentially, millennia. Determining the reproducibility of Sr/Ca records among contemporaneous coral colonies from the same region is critical to...
Land mollusks of the California Channel Islands: An overview of diversity, populations, and conservation status
Charles A. Drost, Jeffrey C. Nekola, Barry Roth, Timothy A. Pearce
2018, Western North American Naturalist (78) 799-810
The land snails and slugs have the highest level of endemism among all major animal groups on the California Channel Islands, with nearly 75% of the native terrestrial species confined to one or more of the 8 islands. In spite of this endemism, and in spite of the rarity of...
Building a response network to investigate potential pathogens associated with unionid mortality events
Eric Leis, Diane L. Waller, Susan Knowles, Tony Goldberg, Joel G. Putnam, Jordan Richard, Sarah Erickson, Emilie Blevins, Jesse Weinzinger
2018, Ellipsaria (20) 44-45
Unexplained mortality events have confounded the mussel conservation community for over 30 years. While the effects of chemical pollutants and environmental factors have been examined, few investigations have focused on the identification of potential mussel pathogens. Consequently, very little is known regarding the impact that pathogens have on freshwater mussel...
Characteristics of tropical tree species in hyperspectral and multispectral data
Matheus Pinheiro Ferreira, Cibele Hummel do Amaral, Gaia Vaglio Laurin, Raymond F. Kokaly, Carlos Roberto de Souza Filho, Yosio Edemir Shimabukuro
Prasad S. Thenkabail, John J. Lyons, Alfredo Huete, editor(s)
2018, Book chapter, Biophysical and biochemical characterization and plant species studies
Remote sensing has been hailed as a promising technology to provide spatially explicit information on tree species distribution. Such information is of high value for ecologists and forest managers, particularly in tropical environments in which it is acquired by costly field inventories performed at the plot level (∼1 ha). Over...
Fractured rock environments
Paul A. Hsieh
2018, Book chapter, Groundwater: State of the science and practive
No abstract available....
Hourly analyses of the large storms and atmospheric rivers that provide most of California's precipitation in only 10 to 100 hours per year
Maryam A. Lamjiri, Michael D. Dettinger, F. Martin Ralph, Nina S. Oakley, Jonathan J. Rutz
2018, San Francisco Estuary and Watershed Science (16) 1-17
California is regularly impacted by floods and droughts, primarily as a result of too many or too few atmospheric rivers (ARs). This study analyzes a two-decade-long hourly precipitation dataset from 176 California weather stations and a 3-hourly AR chronology to report variations in rainfall events across California and their association...
The natural capital accounting opportunity: Let's really do the numbers
James W. Boyd, Kenneth J. Bagstad, Jane Carter Ingram, Carl D. Shapiro, Jeffery Adkins, C. Frank Casey, Clifford S. Duke, Pierre D. Glynn, Erica Goldman, Monica Grasso, Julie L. Hass, Justin A. Johnson, Glenn-Marie Lange, John Matuszak, Ann Miller, Kirsten L. L. Oleson, Stephen M. Posner, Charles Rhodes, Francois Soulard, Michael Vardon, Ferdinando Villa, Brian Voigt, Scott Wentland
2018, BioScience (68) 940-943
The nation’s economic accounts provide objective, regular, and standardized information routinely relied upon by public and private decision makers. But they are incomplete. The U.S. and many other nations currently do not account for the natural capital — such as the wildlife, forests, grasslands, soils, and water bodies—upon which all...
Identifying opportunities for long-lasting habitat conservation and restoration in Hawaii’s shifting climate
Lucas B. Fortini, James D. Jacobi
2018, Regional Environmental Change (18) 2391-2402
Conservation efforts in isolated archipelagos such as Hawaii often focus on habitat-based conservation and restoration efforts that benefit multiple species. Unfortunately, identifying locations where such efforts are safer from climatic shifts is still challenging. We aimed to provide a method to approximate these potential habitat shifts for similar data- and...
Historical patterns of wildfire ignition sources in California ecosystems
Jon E. Keeley, Alexandra D. Syphard
2018, International Journal of Wildland Fire (27) 781-799
State and federal agencies have reported fire causes since the early 1900s, explicitly for the purpose of helping land managers design fire-prevention programs. We document fire-ignition patterns in five homogenous climate divisions in California over the past 98 years on state Cal Fire protected lands and 107 years on federal...
Discovery of a blind geothermal system in Southern Gabbs Valley, western Nevada, through application of the play fairway analysis at multiple scales
James Faulds, Jason W. Craig, Nicholas H. Hinz, Mark F. Coolbaugh, Jonathan M. Glen, Tait E. Earney, William D. Schermerhorn, Jared R. Peacock, Stephen B. Deoreo, Drew L. Siler
2018, Geothermal Resources Council Transactions (42)
The Great Basin region is capable of generating much greater amounts of geothermal energy than currently produced. Most geothermal resources in this region are blind, and thus favorable characteristics for geothermal activity must be synthesized and methodologies developed to discover new commercial-grade systems. The geothermal play fairway concept involves integration...
Evaluating riparian vegetation change in canyon-bound reaches of the Colorado River using spatially extensive matched photo sets
Michael L. Scott, Robert H. Webb, R. Roy Johnson, Raymond M. Turner, Jonathan M. Friedman, Helen C. Fairley
2018, Book chapter, Riparian research and management: Past, present, future: Volume 1 (General Technical Report RMRS-GTR-377)
Much of what we know about the functional ecology of aquatic and riparian ecosystems comes from work on regulated rivers (Johnson et al. 2012). What little we know about unregulated conditions on many of our larger rivers is often inferred from recollections of individuals, personal diaries, notes, maps, and collections...
Ontogenetic changes in swimming speed of silver carp, bighead carp, and grass carp larvae: implications for larval dispersal
Amy E. George, Tatiana Garcia, Benjamin H. Stahlschmidt, Duane Chapman
2018, PeerJ (6)
Bighead, silver, and grass carps are invasive in the waterways of central North America, and grass carp reproduction in tributaries of the Great Lakes has now been documented. Questions about recruitment potential motivate a need for accurate models of egg and larval dispersal. Quantitative data on swimming behaviors and capabilities...
Accounting for surveyor effort in large-scale monitoring programs
Kevin Aagaard, James E. Lyons, Wayne E. Thogmartin
2018, Journal of Fish and Wildlife Management (9) 459-466
Accounting for errors in wildlife surveys is necessary for reliable status assessments and quantification of uncertainty in estimates of population size. We apply a hierarchical log-linear Poisson regression model that accounts for multiple sources of variability in count data collected for the Integrated Waterbird Management and Monitoring Program during 2010–2014....
Navigating the field of decision analysis
Michael C. Runge, Eve McDonald-Madden
2018, Decision Point Online 4-11
Managers, policy makers, and decision makers with responsibility for environmental decisions have an extraordinarily difficult job. The systems they manage are complex (coupled human-natural systems), with many dimensions and complicated dynamics. Our knowledge of how those systems respond to management actions is often limited, so many of the decisions have...
Characterization of groundwater resources in the Chequamegon-Nicolet National Forest, Wisconsin: Nicolet Unit
Anna Fehling, Ken Bradbury, Peter R. Schoephoester, Stephen Mauel, Andrew T. Leaf, Paul Juckem, Randall Hunt
2018, Technical Report 004-2
No abstract available....
Geomorphic evolution of a gravel‐bed river under sediment‐starved vs. sediment‐rich conditions: River response to the world's largest dam removal
Amy E. East, Joshua B. Logan, Mark C. Mastin, Andrew C. Ritchie, Jennifer A. Bountry, Christopher S. Magirl, Joel B. Sankey
2018, Journal of Geophysical Research F: Earth Surface (123) 3338-3369
Understanding river response to sediment pulses is a fundamental problem in geomorphic process studies, with myriad implications for river management. However, because large sediment pulses are rare and usually unanticipated, they are seldom studied at field scale. We examine fluvial response to a massive (~20 Mt) sediment pulse released by the...
Characterization of groundwater resources in the Chequamegon-Nicolet National Forest, Wisconsin: Washburn/Great Divide Unit
Anna Fehling, Ken Bradbury, Peter R. Schoephoester, Stephen Mauel, Andrew T. Leaf, Paul Juckem, Randall Hunt
2018, Technical Report 004-4
No abstract; report has an executive summary....
Estimating the potential costs of brine production to expand the pressure-limited CO2 storage capacity of the Mount Simon Sandstone
Steven T. Anderson, Hossein Jahediesfanjani
Peter D. Warwick, editor(s)
2018, Conference Paper, U.S. Association for Energy Economics and International Association for Energy Economics North American Conference
The conventional wisdom is that widespread deployment of carbon capture and storage (CCS) is likely necessary to be able to satisfy baseload electricity demand, to maintain diversity in the energy mix, and to achieve mitigation of carbon dioxide (CO2) emissions at lowest cost (IPCC, 2014). If national-scale deployment of CCS...
GNIS-LD: Serving and visualizing the Geographic Names Information System Gazetteer as linked data
Blake Regalia, Krzysztof Janowicz, Gengchen Mai, Dalia E. Varanka, E. Lynn Usery
2018, Conference Paper, The semantic web; 15th International Conference, ESWC 2018, Heraklion, Crete, Greece, June 3–7, 2018, Proceedings
In this dataset description paper we introduce the GNIS-LD, an authoritative and public domain Linked Dataset derived from the Geographic Names Information System (GNIS) which was developed by the U.S. Geological Survey (USGS) and the U.S. Board on Geographic Names. GNIS provides data about current, as well as historical, physical,...
Carbon dioxide sealing capacity of the Tuscaloosa marine shale: Insights from mercury injection capillary pressure analyses
Celeste D. Lohr, Paul C. Hackley
2018, Gulf Coast Association of Geological Societies Transactions (68) 611-614
No abstract available....
Population characteristics of Yellow Perch in a central Appalachia hydropower reservoir
Corbin D. Hilling, Nate D. Taylor, Stuart A. Welsh, Dustin M. Smith
2018, Journal of Fish and Wildlife Management (9) 486-495
Estimates of population characteristics of sport fishes inform fisheries management decisions and provide feedback on management strategies. Cheat Lake provides an unusual fishery in West Virginia because the hydropower reservoir supports a Yellow Perch Perca flavescens population. We estimated age structure, size structure, condition, total instantaneous mortality, growth, and summer diet for...
Remote sensing vegetation index methods to evaluate changes in greenness and evapotranspiration in riparian vegetation in response to the Minute 319 environmental pulse flow to Mexico
Pamela L. Nagler, Christopher J. Jarchow, Edward P. Glenn
2018, Proceedings of the International Association of Hydrological Sciences (380) 45-54
During the spring of 2014, 130 million m3 of water were released from the United States' Morelos Dam on the lower Colorado River to Mexico, allowing water to reach the Gulf of California for the first time in 13 years. Our study assessed the effects of water transfer or ecological environmental flows from...
