Characterizing the performance of ecosystem models across time scales: A spectral analysis of the North American Carbon Program site‐level synthesis
Michael C. Dietze, Rodrigo Vargas, Andrew D. Richardson, Paul C. Stoy, Ryan Anderson, M. A. Arain, I. Baker, T. Andrew Black, Jing M. Chen, Philippe Ciais, Lawrence B. Flanagan, Christopher M. Gough, Robert Grant, David Hollinger, R. C. Izaurralde, C.J. Kucharik, P. Lafleur, Shuguang Liu, E. Lokupitiya, Y. Luo, J.W. Munger, Changhui Peng, Benjamin Poulter, David T. Price, D. Ricciuto, William J. Riley, A. Sahoo, Kevin Schaefer, Andrew E. Suyker, Hanqin Tian, Christina Tonitto, Hans Verbeeck, Shashi B. Verma, W. Wang, Ensheng Weng
2011, Journal of Geophysical Research: Biogeosciences (116)
[1] Ecosystem models are important tools for diagnosing the carbon cycle and projecting its behavior across space and time. Despite the fact that ecosystems respond to drivers at multiple time scales, most assessments of model performance do not discriminate different time scales. Spectral methods, such as wavelet analyses, present an...
U.S. Geological Survey Karst Interest Group Proceedings, Fayetteville, Arkansas, April 26-29, 2011
Eve L. Kuniansky, editor(s)
2011, Scientific Investigations Report 2011-5031
Karst aquifer systems are present throughout parts of the United States and some of its territories and are developed in carbonate rocks (primarily limestone and dolomite) that span the entire geologic time frame. The depositional environments, diagenetic processes, and post-depositional tectonic events that form carbonate rock aquifers are varied and...
Factors that influence the hydrologic recovery of wetlands in the Northern Tampa Bay area, Florida
P. A. Metz
2011, Scientific Investigations Report 2011-5127
Reductions in groundwater withdrawals from Northern Tampa Bay well fields were initiated in mid-2002 to improve the hydrologic condition of wetlands in these areas by allowing surface and groundwater levels to recover to previously higher levels. Following these reductions, water levels at some long-term wetland monitoring sites have recovered, while...
TOPMODEL simulations of streamflow and depth to water table in Fishing Brook Watershed, New York, 2007-09
Elizabeth A. Nystrom, Douglas A. Burns
2011, Scientific Investigations Report 2011-5190
TOPMODEL, a physically based, variable-source area rainfall-runoff model, was used to simulate streamflow and depth to water table for the period January 2007-September 2009 in the 65.6 square kilometers of Fishing Brook Watershed in northern New York. The Fishing Brook Watershed is located in the headwaters of the Hudson River...
Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, Georgia
Gerard Gonthier
2011, Open-File Report 2011-1020
Two test wells were completed at Fort Stewart, GA, in January and February 2010 to investigate the potential of using the Lower Floridan aquifer as a source of water to satisfy anticipated increases in water use. One well was completed in the Lower Floridan aquifer at a depth of 1,255...
Evaluation of landslide monitoring in the Polish Carpathians
Brian D. Collins, Rex L. Baum, Teresa Mrozek, Piotr Nescieruk, Zbigniew Perski, Wojciech Raczkowski, Marek Graniczny
2011, Open-File Report 2011-1001
In response to the June 15, 2010 request from the Polish Geological Institute (PGI) to the U.S. Geological Survey (USGS) for assistance and advice regarding real-time landslide monitoring, landslide specialists from the USGS Landslide Hazard Program visited PGI headquarters and field sites in September 2010. During our visit we became...
Groundwater conditions in the Brunswick-Glynn County area, Georgia, 2009
Gregory S. Cherry, Michael F. Peck, Jaime A. Painter, Welby L. Stayton
2011, Scientific Investigations Report 2011-5087
The Upper Floridan aquifer is contaminated with saltwater in a 2-square-mile area of downtown Brunswick, Georgia. The presence of this saltwater has limited the development of the groundwater supply in the Glynn County area. Hydrologic, geologic, and water-quality data are needed to effectively manage water resources. Since 1959, the U.S....
Water withdrawals, wastewater discharge, and water consumption in the Apalachicola-Chattahoochee-Flint River Basin, 2005, and water-use trends, 1970-2005
Richard L. Marella, Julia L. Fanning
2011, Scientific Investigations Report 2011-5130
The Apalachicola-Chattahoochee-Flint (ACF) River Basin covers about 20,500 square miles that drains parts of Alabama, Florida, and Georgia. The basin extends from its headwaters northern Georgia to the Gulf of Mexico. Population in the basin was estimated to be 3.7 million in 2005, an increase of about 41 percent from...
Estimated hydrologic budgets of kettle-hole ponds in coastal aquifers of southeastern Massachusetts
Donald A. Walter, John P. Masterson
2011, Scientific Investigations Report 2011-5137
Kettle-hole ponds in southeastern Massachusetts are in good hydraulic connection to an extensive coastal aquifer system that includes the Plymouth-Carver aquifer system on the mainland and aquifers underlying Cape Cod. The ponds receive water from, and contribute water to, the underlying glacial aquifer; ponds also receive water from precipitation and...
Kirschenmann Road multi-well monitoring site, Cuyama Valley, Santa Barbara County, California
R.R. Everett, R. T. Hanson, D. S. Sweetkind
2011, Open-File Report 2011-1292
The U.S. Geological Survey (USGS), in cooperation with the Water Agency Division of the Santa Barbara County Department of Public Works, is evaluating the geohydrology and water availability of the Cuyama Valley, California (fig. 1). As part of this evaluation, the USGS installed the Cuyama Valley Kirschenmann Road multiple-well monitoring...
Historical streamflows of Double Mountain Fork of Brazos River and water-surface elevations of Lake Alan Henry, Garza County, Texas, water years 1962-2010
William H. Asquith, Joseph Vrabel
2011, Fact Sheet 2011-3147
The U.S. Geological Survey (USGS), in cooperation with the City of Lubbock, Texas, operates two surface-water stations in Garza County, Tex.: USGS streamflow-gaging station 08079600 Double Mountain Fork Brazos River at Justiceburg, Tex., and 08079700 Lake Alan Henry Reservoir, a water-supply reservoir about 60 miles southeast of Lubbock, Tex., and...
U.S. Geological Survey Community for Data Integration-NWIS Web Services Snapshot Tool for ArcGIS
Sally Holl
2011, Fact Sheet 2011-3141
U.S. Geological Survey (USGS) data resources are so vast that many scientists are unaware of data holdings that may be directly relevant to their research. Data are also difficult to access and large corporate databases, such as the National Water Information System (NWIS) that houses hydrologic data for the Nation,...
Monitoring to assess progress toward meeting the Assabet River, Massachusetts, phosphorus total maximum daily load - Aquatic macrophyte biomass and sediment-phosphorus flux
Marc J. Zimmerman, Yu Qian, Tian Yong Q.
2011, Scientific Investigations Report 2011-5179
In 2004, the Total Maximum Daily Load (TMDL) for Total Phosphorus in the Assabet River, Massachusetts, was approved by the U.S. Environmental Protection Agency. The goal of the TMDL was to decrease the concentrations of the nutrient phosphorus to mitigate some of the instream ecological effects of eutrophication on the...
The role of remote sensing observations and models in hydrology: The science of evapotranspiration
Pamela Nagler
2011, Hydrological Processes (25) 3977-3978
Over 15 years ago, Morton (1994) summarized the state of evapotranspiration (ET) research pessimistically: ‘There have been few significant advances in our knowledge of evaporation on an environmental scale over the past four decades, a state of affairs linked to the current sterility of hydrology and related environmental sciences. Furthermore,...
Mineralogy, morphology, and textural relationships in coatings on quartz grains in sediments in a quartz-sand aquifer
Shouliang Zhang, Douglas B. Kent, David C. Elbert, Zhi Shi, James A. Davis, David R. Veblen
2011, Journal of Contaminant Hydrology (124) 57-67
Mineralogical studies of coatings on quartz grains and bulk sediments from an aquifer on Western Cape Cod, Massachusetts, USA were carried out using a variety of transmission electron microscopy (TEM) techniques. Previous studies demonstrated that coatings on quartz grains control the adsorption properties of these sediments. Samples for TEM characterization...
Using observed postconstruction peak discharges to evaluate a hydrologic and hydraulic design model, Boneyard Creek, Champaign and Urbana, Illinois
Thomas M. Over, David T. Soong, Robert R. Holmes Jr.
2011, Scientific Investigations Report 2011-5176
Boneyard Creek—which drains an urbanized watershed in the cities of Champaign and Urbana, Illinois, including part of the University of Illinois at Urbana-Champaign (UIUC) campus—has historically been prone to flooding. Using the Stormwater Management Model (SWMM), a hydrologic and hydraulic model of Boneyard Creek was developed for the design of...
Sources of mercury to San Francisco Bay surface sediment as revealed by mercury stable isotopes
Gretchen E. Gehrke, Joel D. Blum, Mark Marvin-DePasquale
2011, Geochimica et Cosmochimica Acta (75) 691-705
Mercury (Hg) concentrations and isotopic compositions were examined in shallow-water surface sediment (0–2 cm) from San Francisco (SF) Bay to determine the extent to which historic Hg mining contributes to current Hg contamination in SF Bay, and to assess the use of Hg isotopes to trace sources of contamination in...
Exchange of Groundwater and Surface-Water Mediated by Permafrost Response to Seasonal and Long Term Air Temperature Variation
Shemin Ge, Jeffrey McKenzie, Clifford Voss, Qingbai Wu
2011, Geophysical Research Letters (38)
Permafrost dynamics impact hydrologic cycle processes by promoting or impeding groundwater and surface water exchange. Under seasonal and decadal air temperature variations, permafrost temperature changes control the exchanges between groundwater and surface water. A coupled heat transport and groundwater flow model, SUTRA, was modified to simulate groundwater flow and heat...
A comparison of avian communities and habitat characteristics in floodplain forests associated with valley plugs and unchannelized streams
Aaron R. Pierce, Sammy L. King
2011, River Research and Applications (27) 1315-1324
Channelization of streams associated with floodplain forested wetlands has occurred extensively throughout the world and specifically in the southeastern United States. Channelization of fluvial systems alters the hydrologic and sedimentation processes that sustain these systems. In western Tennessee, channelization and past land-use practices have caused drastic geomorphic and hydrologic changes,...
Spatial scaling of core and dominant forest cover in the Upper Mississippi and Illinois River floodplains, USA
Nathan R. De Jager, Jason J. Rohweder
2011, Landscape Ecology (26) 697-708
Different organisms respond to spatial structure in different terms and across different spatial scales. As a consequence, efforts to reverse habitat loss and fragmentation through strategic habitat restoration ought to account for the different habitat density and scale requirements of various taxonomic groups. Here, we estimated the local density of...
Spatial patterns of mercury in macroinvertebrates and fishes from streams of contrasting forested landscapes in the eastern United States
Karen Riva-Murray, Lia C. Chasar, Paul M. Bradley, Douglas A. Burns, Mark E. Brigham, Martyn J. Smith, Thomas A. Abrahamsen
2011, Ecotoxicology (20) 1530-1542
Controls on mercury bioaccumulation in lotic ecosystems are not well understood. During 2007–2009, we studied mercury and stable isotope spatial patterns of macroinvertebrates and fishes from two medium-sized (2) forested basins in contrasting settings. Samples were collected seasonally from multiple sites across the Fishing Brook basin (FBNY), in New...
Quantifying the hydrological responses to climate change in an intact forested small watershed in southern China
Guo-Yi Zhou, Xiaohua Wei, Yiping Wu, Shu-Guang Liu, Yuhui Huang, Junhua Yan, Deqiang Zhang, Qianmei Zhang, Juxiu Liu, Ze Meng, Chunlin Wang, Guowei Chu, Shizhong Liu, Xu-Li Tang, Xiaodong Liu
2011, Global Change Biology (17) 3736-3746
Responses of hydrological processes to climate change are key components in the Intergovernmental Panel for Climate Change (IPCC) assessment. Understanding these responses is critical for developing appropriate mitigation and adaptation strategies for sustainable water resources management and protection of public safety. However, these responses are not well understood and little...
Spatial and seasonal variability of dissolved methylmercury in two stream basins in the Eastern United States
Paul M. Bradley, Douglas A. Burns, Karen Riva-Murray, Mark E. Brigham, Daniel T. Button, Lia C. Chasar, Mark Marvin-DiPasquale, Mark A. Lowery, Celeste A. Journey
2011, Environmental Science & Technology (45) 2048-2055
We assessed methylmercury (MeHg) concentrations across multiple ecological scales in the Edisto (South Carolina) and Upper Hudson (New York) River basins. Out-of-channel wetland/floodplain environments were primary sources of filtered MeHg (F-MeHg) to the stream habitat in both systems. Shallow, open-water areas in both basins exhibited low F-MeHg concentrations and decreasing...
Silver bioaccumulation dynamics in a freshwater invertebrate after aqueous and dietary exposures to nanosized and ionic Ag
Marie-Noe le Croteau, Superb K. Misra, Samuel N. Luoma, Eugenia Valsami-Jones
2011, Environmental Science & Technology (45) 6600-6607
We compared silver (Ag) bioavailability and toxicity to a freshwater gastropod after exposure to ionic silver (Ag+) and to Ag nanoparticles (Ag NPs) capped with citrate or with humic acid. Silver form, exposure route, and capping agent influence Ag bioaccumulation dynamics in Lymnaea stagnalis. Snails efficiently accumulated Ag from all...
Vulnerability of high-latitude soil organic carbon in North America to disturbance
Guido Grosse, Jennifer W. Harden, Merritt Turetsky, A. David McGuire, Philip Camill, Charles Tarnocai, Steve Frolking, Edward A.G. Schuur, Torre Jorgenson, Sergei Marchenko, Vladimir Romanovsky, Kimberly P. Wickland, Nancy French, Mark P. Waldrop, Laura L. Bourgeau-Chavez, Robert G. Striegl
2011, Journal of Geophysical Research G: Biogeosciences (116) 1-23
This synthesis addresses the vulnerability of the North American high-latitude soil organic carbon (SOC) pool to climate change. Disturbances caused by climate warming in arctic, subarctic, and boreal environments can result in significant redistribution of C among major reservoirs with potential global impacts. We divide the current northern high-latitude SOC...
