Spatial autoregressive models for statistical inference from ecological data
Jay M. Ver Hoef, Erin E. Peterson, Mevin Hooten, Ephraim M. Hanks, Marie-Josée Fortin
2019, Ecological Monographs (88) 36-59
Ecological data often exhibit spatial pattern, which can be modeled as autocorrelation. Conditional autoregressive (CAR) and simultaneous autoregressive (SAR) models are network‐based models (also known as graphical models) specifically designed to model spatially autocorrelated data based on neighborhood relationships. We identify and discuss six different types...
The impact of late Holocene land-use change, climate variability, and sea-level rise on carbon storage in tidal freshwater wetlands on the southeastern United States Coastal Plain
Miriam Jones, Christopher E. Bernhardt, K. W. Krauss, Gregory E. Noe
2019, Journal of Geophysical Research: Biogeosciences (122) 3126-3141
This study examines Holocene impacts of changes in climate, land use, and sea-level rise (SLR) on sediment accretion, carbon accumulation rates (CAR), and vegetation along a transect of tidal freshwater forested wetlands (TFFW) to oligohaline marsh along the Waccamaw River, South Carolina (4 sites) and along the Savannah River, Georgia...
Exploring the historical earthquakes preceding the giant 1960 Chile earthquake in a time‐dependent seismogenic zone
M. Cisternas, M. Carvajal, Robert L. Wesson, L.L Ely, N Gorigoitia
2019, Bulletin of the Seismological Society of America (107) 2664-2675
New documentary findings and available paleoseismological evidence provide both new insights into the historical seismic sequence that ended with the giant 1960 south-central Chile earthquake and relevant information about the region’s seismogenic zone. According to the few available written records, this region was previously struck by earthquakes of varying size...
The role of baseflow in dissolved solids delivery to streams in the Upper Colorado River Basin
Christine Rumsey, Matthew P. Miller, Gregory E. Schwarz, Robert M. Hirsch, David D. Susong
Gregory Schwarz, Robert M. Hirsch, David Susong, editor(s)
2019, Hydrological Processes (31) 4705-4718
Salinity has a major effect on water users in the Colorado River Basin, estimated to cause almost $300 million per year in economic damages. The Colorado River Basin Salinity Control Program implements and manages projects to reduce salinity loads, investing millions of dollars per year in irrigation...
Nominal 30-m cropland extent map of continental Africa by integrating pixel-based and object-based algorithms using Sentinel-2 and Landsat-8 Data on Google Earth Engine
Jun Xiong, Prasad S. Thenkabail, James C. Tilton, Murali Krishna Gumma, Pardhasaradhi G. Teluguntla, Adam Oliphant, Russell G. Congalton, Kamini Yadav, Noel Gorelick
2019, Remote Sensing (9)
A satellite-derived cropland extent map at high spatial resolution (30-m or better) is a must for food and water security analysis. Precise and accurate global cropland extent maps, indicating cropland and non-cropland areas, are starting points to develop higher-level products such as crop watering methods (irrigated or rainfed), cropping intensities...
Twenty years (1990–2010) of geodetic monitoring of Galeras volcano (Colombia) from continuous tilt measurements.
Lourdes Narvaez Medina, Dario F Arcos, Maurizio Battaglia
2019, Journal of Volcanology and Geothermal Research (344) 232-245
Galeras - an andesitic stratovolcano part of the Galeras Volcanic Complex - is one of the most active volcanoes in Colombia. Historic activity is centered on a small-volume cone inside the youngest amphitheater, which breaches the west flank of the volcano. At least 30 confirmed eruption periods have been recorded...
MODIS phenology-derived, multi-year distribution of conterminous U.S. crop types
Richard Massey, T.T Sankey, Russ Congalton, Kamini Yadav, Prasad Thenkabail, Mutlu Ozdogan, Sanchez Meador
2019, Remote Sensing of Environment (198) 490-503
Innovative, open, and rapid methods to map crop types over large areas are needed for long-term cropland monitoring. We developed two novel and automated decision tree classification approaches to map crop types across the conterminous United States (U.S.) using MODIS 250 m resolution data:...
Avian predation on juvenile Salmonids: Spatial and temporal analysis based on acoustic and passive integrated transponder tags
Allen F. Evans, Quinn Payton, Aaron Turecek, Bradley D. Cramer, Ken Collis, Daniel D. Roby, Peter J. Loschl, Leah Sullivan, Skalski John, Mark Weiland, Curtis Dotson
2019, Transactions of the American Fisheries Society
We evaluated the impact of predation on juvenile steelhead Oncorhynchus mykiss and yearling and subyearling Chinook Salmon O. tshawytscha by piscivorous waterbirds from 11 different breeding colonies in the Columbia River basin during 2012 and 2014. Fish were tagged with both acoustic tags and PIT tags and were tracked via a network of hydrophone...
Organic geochemistry and toxicology of a stream impacted by unconventional oil and gas wastewater disposal operations
William H. Orem, Matthew S. Varonka, Lynn M. Crosby, Karl B. Haase, Keith A. Loftin, Michelle L. Hladik, Denise M. Akob, Calin Tatu, Adam C. Mumford, Jeanne B. Jaeschke, Anne L. Bates, Tiffani Schell, Isabelle M. Cozzarelli
2019, Applied Geochemistry (80) 155-167
Water and sediment extracts samples were analyzed for extractable hydrocarbons by gas chromatography/mass spectrometry (GC/MS) using an Agilent (Agilent Technologies, Palo Alto, CA, USA) 7890 series GC and 5975 electron ionization (EI) mass selective detector (MSD) operated in scan mode. Agilent ChemStation software was used for data acquisition and analysis...
A 15-year catalog of more than 1 million low-frequency earthquakes: Tracking tremor and slip along the deep San Andreas Fault
David R. Shelly
2019, Journal of Geophysical Research (122) 3739-3753
Low-frequency earthquakes (LFEs) are small, rapidly recurring slip events that occur on the deep extensions of some major faults. Their collective activation is often observed as a semi-continuous signal known as tectonic (or non-volcanic) tremor. This manuscript presents a catalog of more than 1 million LFEs detected along...
Using a process-based model of pre-eruptive seismic patterns to forecast evolving eruptive styles at Sinabung Volcano, Indonesia
Wendy A. McCausland, Hendra Gunawan, Randall A. White, Novianti Indrastuti, Cahya Patria, Yasa Suparman, Armen Putra, Hetty Triastuty, Mochammad Hendrasto
2019, Journal of Volcanology and Geothermal Research (382) 253-266
Most volcanoes worldwide are not monitored in real-time; for those that are, patterns of pre-eruptive earthquakes coupled with conceptual models of magma ascent enable short-term forecasting of eruption onset. Basic event locations, characterization of background seismicity, and recognition of changes in earthquake types and energy release are most important to...
U-Pb and Lu-Hf isotope, age, and trace-element data from zircons at four sites in the western Alaska Range and Talkeetna Mountains, Alaska
Erin Todd, Andrew R. C. Kylander-Clark, Alicja Wypych, Evan Twelker, Karri R. Sicard
2019, Report
This Division of Geological & Geophysical Surveys (DGGS) Raw Data File presents U-Pb geochronology and Lu-Hf isotopic compositions, age-dating results, and additional trace-elemental composition of zircons from four granitoids sampled during investigations by DGGS geologists in the western Alaska Range and the Talkeetna Mountains. The purpose of the Lu-Hf and...
Earth Resources Observation and Science (EROS) Center—Popular Websites
U.S. Geological Survey
2019, General Information Product 171
This general information product (GIP) lists websites related to the Earth Resources Observation and Science (EROS) Center and supersedes GIP 84....
Evidence for conservative transport of dissolved organic carbon in major river basins in the Gulf of Maine Watershed
Thomas G. Huntington, Collin S. Roesler, George R. Aiken
2019, Journal of Hydrology (573) 755-767
Transport and fate of dissolved organic carbon (DOC) in rivers are important aspects of the carbon cycle and the critical linkage between terrestrial, aquatic, and marine systems. Recent studies have quantified fluvial export to the marine environment in many systems, but in-stream losses of DOC are poorly constrained. This study...
Species occurrence data for the Nation—USGS Biodiversity Information Serving Our Nation (BISON)
U.S. Geological Survey
2019, General Information Product 160
USGS Biodiversity Information Serving Our Nation (BISON) is a unique, Web-based Federal mapping resource for species occurrence data in the United States and its Territories. BISON’s size is unprecedented, including records for most living species found in the United States and encompassing the efforts of more than a million professional...
Sturgeon in the Sacramento-San Joaquin watershed: new insights to support conservation and management
A Peter Klimley, Eric D Chapman, J. J. Cech Jr, Dennis E. Cocherell, Nann A. Fangue, Marty Gingras, Zachary Jackson, Emily A Miller, Ethan A. Mora, Jamilynn B Poletto, Andrea M Schreier, Alicia Seesholtz, Kenneth J. Sulak, Michael J. Thomas, David J.A. Woodbury, Megan T. Wyman
2019, San Francisco Estuary and Watershed Science (13) 1-19
The goal of a day-long symposium on March 3, 2015, Sturgeon in the Sacramento–San Joaquin Watershed: New Insights to Support Conservation and Management, was to present new information about the physiology, behavior, and ecology of the green (Acipenser medirostris) and white sturgeon (Acipenser transmontanus) to help guide enhanced management and...
Species occurrence data for the nation
Water Resources Division, U.S. Geological Survey
2019, Fact Sheet 2015-3068
USGS Biodiversity Information Serving Our Nation (BISON) is a unique, web-based Federal mapping resource for species occurrence data in the United States and its Territories.BISON’s size is unprecedented, including records for most living species found in the United States and encompassing the efforts of more than a million professional and...
Metrics for assessing the quality of groundwater used for public supply, CA, USA: Equivalent-population and area
Kenneth Belitz, Miranda S. Fram, Tyler D. Johnson
2019, Environmental Science & Technology (49) 8830-8838
Data from 11 000 public supply wells in 87 study areas were used to assess the quality of nearly all of the groundwater used for public supply in California. Two metrics were developed for quantifying groundwater quality: area with high concentrations (km2 or proportion) and equivalent-population relying upon groundwater with high...
Generalization in practice within national mapping agencies
Cecile Duchene, Blanca Baella, Cynthia A. Brewer, Dirk Burghardt, Barbara P. Buttenfield, Julien Gaffuri, Dominik Kauferle, Francois Lecordix, Emmanuel Maugeais, Ron Nijhuis, Maria Pla, Marc Post, Nicolas Regnauld, Larry Stanislawski, Jantien Stoter, Katalin Toth, Sabine Urbanke, Vincent van Altena, Antje Wiedemann
2019, Book chapter, Abstracting information in a data rich world: Methodologies and applications of map generalization
National Mapping Agencies (NMAs) are still among the main end users of research into automated generalisation, which is transferred into their produc- tion lines via various means. This chapter includes contributions from seven NMAs, illustrating how automated generalisation is used in practice within their partly or fully automated databases and...
Chapter A6.3. Specific Conductance
U.S. Geological Survey
2019, Techniques and Methods 9-A6.3
The “National Field Manual for the Collection of Water-Quality Data” (NFM) provides guidelines and procedures for U.S. Geological Survey (USGS) personnel who collect data used to assess the quality of the Nation’s surface-water and groundwater resources. This chapter, NFM A6.3, provides guidance and protocols for the measurement of specific conductance...
Establishment of a vertical control network along the St. Croix River in New Brunswick and Maine
Pamela J. Lombard
2019, Open-File Report 2013-1236
Consistent elevations at stable benchmarks, referenced to a common datum, are important for measuring and comparing water levels and for computing flows throughout a watershed. Elevations are presented for 38 control points within the St. Croix River watershed, mostly along the main stem of the St. Croix River. Vertical control...
Injection-induced earthquakes
William L. Ellsworth
2019, Science (341) 1225942-1-1225942-7
Earthquakes in unusual locations have become an important topic of discussion in both North America and Europe, owing to the concern that industrial activity could cause damaging earthquakes. It has long been understood that earthquakes can be induced by impoundment of reservoirs, surface and underground mining, withdrawal of fluids and...
Shear-wave seismic reflection studies of unconsolidated sediments in the near surface
Karl J. Ellefsen, Seth S. Haines
2019, Geophysics (75) B59-B66
We have successfully applied of SH-wave seismic reflection methods to two different near-surface problems targeting unconsolidated sediments. At the former Fort Ord, where the water table is approximately 30m deep, we imaged aeolian and marine aquifer and aquitard stratigraphy to a depth of approximately 80m. We identified reflections from sand/clay...
Analysis of groundwater response to tidal fluctuations, Operable Unit 1, Naval Base Kitsap, Keyport, Washington
Chad C. Opatz, Richard S. Dinicola
2019, Open-File Report 2019-1098
Chlorinated volatile organic compounds have affected groundwater beneath a former 9-acre landfill at Operable Unit 1 (OU 1) of Naval Base Kitsap (NBK) Keyport, in Keyport, Washington. The landfill was the primary disposal area for domestic and industrial waste generated by NBK Keyport from the 1930s through 1973. Naval Facilities...
Glacially-induced hydromechanical coupling in shale may have caused underpressured water in the eastern Michigan Basin despite the possible presence of gas phase methane
Michelle R. Plampin
2019, Geophysical Research Letters (46) 8125-8132
When glacial cycles occur above low-permeability geologic formations, such as the shale and limestone units being considered for nuclear waste disposal in Canada, pressures may differ greatly from normal hydrostatic conditions. Although shale also often has the propensity to generate separate phase fluids like natural gas, it is largely uncertain...
