Monitoring Everglades freshwater marsh water level using L-band synthetic aperture radar backscatter
Jin-Woo Kim, Zhong Lu, John Jones, C. K. Shum, Hyongki Lee, Yuanyuan Jia
2014, Remote Sensing of Environment (150) 66-81
The Florida Everglades plays a significant role in controlling floods, improving water quality, supporting ecosystems, and maintaining biodiversity in south Florida. Adaptive restoration and management of the Everglades requires the best information possible regarding wetland hydrology. We developed a new and innovative approach to quantify spatial and temporal variations in...
Lateral baroclinic forcing enhances sediment transport from shallows to channel in an estuary
Jessica R. Lacy, Steve Gladding, Andreas Brand, Audric Collignon, Mark T. Stacey
2014, Estuaries and Coasts (37) 1058-1077
We investigate the dynamics governing exchange of sediment between estuarine shallows and the channel based on field measurements at eight stations spanning the interface between the channel and the extensive eastern shoals of South San Francisco Bay. The study site is characterized by longitudinally homogeneous bathymetry and a straight channel,...
Spatial extent and dissipation of the deep chlorophyll layer in Lake Ontario during the Lake Ontario lower foodweb assessment, 2003 and 2008
J. M. Watkins, Brian M. Weidel, L. G. Rudstam, K. T. Holek
2014, Aquatic Ecosystem Health & Management (18) 18-27
Increasing water clarity in Lake Ontario has led to a vertical redistribution of phytoplankton and an increased importance of the deep chlorophyll layer in overall primary productivity. We used in situ fluorometer profiles collected in lakewide surveys of Lake Ontario in 2008 to assess the spatial extent and intensity of...
Estimating earthquake magnitudes from reported intensities in the central and eastern United States
Oliver S. Boyd, Chris H. Cramer
2014, Bulletin of the Seismological Society of America (104) 1709-1722
A new macroseismic intensity prediction equation is derived for the central and eastern United States and is used to estimate the magnitudes of the 1811–1812 New Madrid, Missouri, and 1886 Charleston, South Carolina, earthquakes. This work improves upon previous derivations of intensity prediction equations by including additional intensity data, correcting...
Synthesis of thirty years of surface water quality and aquatic biota data in Shenandoah National Park: Collaboration between the US Geological Survey and the National Park Service
Karen C. Rice, John D. Jastram, John E. B. Wofford, James P. Schaberl
2014, The George Wright Forum (31) 198-204
The eastern United States has been the recipient of acidic atmospheric deposition (hereinafter, “acid rain”) for many decades. Deleterious effects of acid rain on natural resources have been well documented for surface water (e.g., Likens et al. 1996; Stoddard et al. 2001), soils (Bailey et al. 2005), forest health (Long...
Preliminary geologic map of the eastern Willapa Hills, Cowlitz, Lewis, and Wahkiakum Counties, Washington
Ray E. Wells, Michael G. Sawlan
2014, Open-File Report 2014-1063
This digital map database and the PDF derived from the database were created from the analog geologic map: Wells, R.E. (1981), “Geologic map of the eastern Willapa Hills, Cowlitz, Lewis, and Wahkiakum Counties, Washington.” The geodatabase replicates the geologic mapping of the 1981 report with minor exceptions along water boundaries...
Time-averaged discharge rate of subaerial lava at Kīlauea Volcano, Hawai‘i, measured from TanDEM-X interferometry: Implications for magma supply and storage during 2011-2013
Michael P. Poland
2014, Journal of Geophysical Research B: Solid Earth (119) 5464-5481
Differencing digital elevation models (DEMs) derived from TerraSAR add-on for Digital Elevation Measurements (TanDEM-X) synthetic aperture radar imagery provides a measurement of elevation change over time. On the East Rift Zone (EZR) of Kīlauea Volcano, Hawai‘i, the effusion of lava causes changes in topography. When these elevation changes are summed...
Late Holocene sea level variability and Atlantic Meridional Overturning Circulation
Thomas M. Cronin, Jesse R. Farmer, R. E. Marzen, E. Thomas, J.C. Varekamp
2014, Paleoceanography (29) 765-777
Pre-twentieth century sea level (SL) variability remains poorly understood due to limits of tide gauge records, low temporal resolution of tidal marsh records, and regional anomalies caused by dynamic ocean processes, notably multidecadal changes in Atlantic Meridional Overturning Circulation (AMOC). We examined SL and AMOC variability along the eastern United...
Identifying dominant controls on hydrologic parameter transfer from gauged to ungauged catchments: a comparative hydrology approach
R. Singh, S.A. Archfield, T. Wagener
2014, Journal of Hydrology (517) 985-996
Daily streamflow information is critical for solving various hydrologic problems, though observations of continuous streamflow for model calibration are available at only a small fraction of the world’s rivers. One approach to estimate daily streamflow at an ungauged location is to transfer rainfall–runoff model parameters calibrated at a gauged (donor)...
Changing amounts and sources of moisture in the U.S. southwest since the Last Glacial Maximum in response to global climate change
Weimin Feng, Benjamin F. Hardt, Jay L. Banner, Kevin J. Meyer, Eric W. James, MaryLynn Musgrove, R. Lawrence Edwards, Hai Cheng, Angela Min
2014, Earth and Planetary Science Letters (401) 47-56
The U.S. southwest has a limited water supply and is predicted to become drier in the 21st century. An improved understanding of factors controlling moisture sources and availability is aided by reconstruction of past responses to global climate change. New stable isotope and growth-rate records for a central Texas speleothem...
Imaging P and S attenuation in the Sacramento-San Joaquin Delta region, northern California
Donna Eberhart-Phillips, Clifford Thurber, Jon Peter B. Fletcher
2014, Bulletin of the Seismological Society of America (104) 2322-2336
We obtain 3-D Qp and Qs models for the Delta region of the Sacramento and San Joaquin Rivers, a large fluvial-agricultural portion of the Great Valley located between the Sierra Nevada batholith and the San Francisco Bay - Coast Ranges region of active faulting. Path attenuation t* values have been...
Decreased atmospheric sulfur deposition across the southeastern U.S.: When will watersheds release stored sulfate?
Karen C. Rice, Todd M. Scanlon, Jason A. Lynch, Bernard J. Cosby
2014, Environmental Science & Technology (48) 10071-10078
Emissions of sulfur dioxide (SO2) to the atmosphere lead to atmospheric deposition of sulfate (SO42-), which is the dominant strong acid anion causing acidification of surface waters and soils in the eastern United States (U.S.). Since passage of the Clean Air Act and its Amendments, atmospheric deposition of SO2 in...
Linking rapid magma reservoir assembly and eruption trigger mechanisms at evolved Yellowstone-type supervolcanoes
J.F. Wotzlaw, I.N. Bindeman, Kathryn E. Watts, A.K. Schmitt, L. Caricchi, U. Schaltegger
2014, Geology (42) 807-810
The geological record contains evidence of volcanic eruptions that were as much as two orders of magnitude larger than the most voluminous eruption experienced by modern civilizations, the A.D. 1815 Tambora (Indonesia) eruption. Perhaps nowhere on Earth are deposits of such supereruptions more prominent than in the Snake River Plain–Yellowstone...
Paleoseismology of the Southern Section of the Black Mountains and Southern Death Valley Fault Zones, Death Valley, United States
Marsha S. Sohn, Jeffrey R. Knott, Shannon Mahan
2014, Environmental & Engineering Geoscience (20) 177-198
The Death Valley Fault System (DVFS) is part of the southern Walker Lane–eastern California shear zone. The normal Black Mountains Fault Zone (BMFZ) and the right-lateral Southern Death Valley Fault Zone (SDVFZ) are two components of the DVFS. Estimates of late Pleistocene-Holocene slip rates and recurrence intervals for these two...
Geohydrologic and water-quality data in the vicinity of the Rialto-Colton Fault, San Bernardino, California
Nicholas F. Teague, Anthony A. Brown, Linda R. Woolfenden
2014, Data Series 813
The Rialto-Colton Basin is in western San Bernardino County, about 60 miles east of Los Angeles, California. The basin is bounded by faults on the northeast and southwest sides and contains multiple barriers to groundwater flow. The structural geology of the basin leads to complex hydrology. Between 2001 and 2008,...
Hydrogeologic framework and groundwater/surface-water interactions of the upper Yakima River Basin, Kittitas County, central Washington
Andrew S. Gendaszek, D. Matthew Ely, Stephen R. Hinkle, Sue C. Kahle, Wendy B. Welch
2014, Scientific Investigations Report 2014-5119
The hydrogeology, hydrology, and geochemistry of groundwater and surface water in the upper (western) 860 square miles of the Yakima River Basin in Kittitas County, Washington, were studied to evaluate the groundwater-flow system, occurrence and availability of groundwater, and the extent of groundwater/surface-water interactions. The study area ranged in altitude...
EAARL-B coastal topography: eastern New Jersey, Hurricane Sandy, 2012: first surface
C. Wayne Wright, Xan Fredericks, Rodolfo J. Troche, Emily S. Klipp, Christine J. Kranenburg, David B. Nagle
2014, Data Series 767
These remotely sensed, geographically referenced elevation measurements of lidar-derived first-surface (FS) topography datasets were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida. This project provides highly detailed and accurate datasets for a portion of the New Jersey coastline beachface, acquired pre-Hurricane Sandy...
Interagency partnership to assess and restore a degraded urban riverine wetland: Dyke Marsh Wildlife Preserve, Virginia
Brent W. Steury, Ronald J. Litwin, Erik T. Oberg, Joseph P. Smoot, Milan J. Pavich, Geoffrey Sanders, Vincent L. Santucci
2014, The George Wright Forum (31) 116-128
The narrow-leaved cattail wetland known as Dyke Marsh formally became a land holding of George Washington Memorial Parkway (GWMP, a unit of the national park system) in 1959, along with a congressional directive to honor a newly-let 30-year commercial sand and gravel dredge-mining lease at the site. Dredging continued until...
Reconstruction of an early Paleozoic continental margin based on the nature of protoliths in the Nome Complex, Seward Peninsula, Alaska
Alison B. Till, Julie A. Dumoulin, Robert A. Ayuso, John N. Aleinikoff, Jeffrey M. Amato, John F. Slack, W.C. Pat Shanks III
2014, GSA Special Papers
The Nome Complex is a large metamorphic unit that sits along the southern boundary of the Arctic Alaska–Chukotka terrane, the largest of several micro continental fragments of uncertain origin located between the Siberian and Laurentian cratons. The Arctic Alaska–Chukotka terrane moved into its present position during the Mesozoic; its Mesozoic...
Estimated 2012 groundwater potentiometric surface and drawdown from predevelopment to 2012 in the Santa Fe Group aquifer system in the Albuquerque metropolitan area, central New Mexico
Rachel I. Powell, Sarah E. McKean
2014, Scientific Investigations Map 3301
Historically, the water-supply requirements of the Albuquerque metropolitan area of central New Mexico were met almost exclusively by groundwater withdrawal from the Santa Fe Group aquifer system. In response to water-level declines, the Albuquerque Bernalillo County Water Utility Authority (ABCWUA) began diverting water from the San Juan-Chama Drinking Water Project...
Site response in the eastern United States: A comparison of Vs30 measurements with estimates from horizontal:vertical spectral ratios
Daniel E. McNamara, William J. Stephenson, Jackson K. Odum, Robert Williams, Lind Gee
2014, GSA Special Papers (509) 67-79
Earthquake damage is often increased due to local ground-motion amplification caused by soft soils, thick basin sediments, topographic effects, and liquefaction. A critical factor contributing to the assessment of seismic hazard is detailed information on local site response. In order to address and quantify the site response at seismograph stations...
Surficial geologic map of the Charleston region, Berkeley, Charleston, Colleton, Dorchester, and Georgetown Counties, South Carolina
Robert E. Weems, William C. Lewis, Earl M. Lemon Jr.
2014, Open-File Report 2013-1030
This map portrays the surface and shallow subsurface geology of the greater Charleston, S.C. region east of 80°30′ west and south of 33°15′ north. The region covers the entirety of Charleston County and portions of Berkeley, Colleton, Dorchester, and Georgetown Counties. Units locally exposed at the surface range in age...
Carnivore distributions across chaparral habitats exposed to wildfire and rural housing in southern California
P.A. Schuette, J.E. Diffendorfer, D.H. Deutschman, S. Tremor, W. Spencer
2014, International Journal of Wildland Fire (23) 591-600
Chaparral and coastal sage scrub habitats in southern California support biologically diverse plant and animal communities. However, native plant and animal species within these shrubland systems are increasingly exposed to human-caused wildfires and an expansion of the human–wildland interface. Few data exist to evaluate the effects of fire and anthropogenic...
Preliminary bedrock and surficial geologic map of the west half of the Sanders 30' x 60' quadrangle, Navajo and Apache Counties, northern Arizona
Lee Amoroso, Susan S. Priest, Margaret Hiza-Redsteer
2014, Open-File Report 2014-1124
The bedrock and surficial geologic map of the west half of the Sanders 30' x 60' quadrangle was completed in a cooperative effort of the U.S. Geological Survey (USGS) and the Navajo Nation to provide regional geologic information for management and planning officials. This report provides baseline geologic information that...
2010 weather and aeolian sand-transport data from the Colorado River corridor, Grand Canyon, Arizona
Timothy P. Dealy, Amy E. East, Helen C. Fairley
2014, Open-File Report 2014-1135
Measurements of weather parameters and aeolian sand transport were made in 2010 near selected archeological sites in the Colorado River corridor through Grand Canyon, Arizona. Data collected in 2010 indicate event- and seasonal-scale variations in rainfall, wind, temperature, humidity, and barometric pressure. Differences in weather patterns between 2009 and 2010...
