Longitudinal differences in habitat complexity and fish assemblage structure of a great plains river
J.L. Eitzmann, C.P. Paukert
2010, American Midland Naturalist (163) 14-32
We investigated the spatial variation in the Kansas River (USA) fish assemblage to determine how fish community structure changes with habitat complexity in a large river. Fishes were collected at ten sites throughout the Kansas River for assessing assemblage structure in summer 2007. Aerial imagery indicated riparian land use within...
Treated wastewater and Nitrate transport beneath irrigated fields near Dodge city, Kansas
M. Sophocleous, M.A. Townsend, F. Vocasek, Liwang Ma, K.C. Ashok
2010, Current Research in Earth Sciences (258) 1-31
Use of secondary-treated municipal wastewater for crop irrigation south of Dodge City, Kansas, where the soils are mainly of silty clay loam texture, has raised a concern that it has resulted in high nitratenitrogen concentrations (10-50 mg/kg) in the soil and deeper vadose zone, and also in the underlying deep...
Geologie study off gravels of the Agua Fria River, Phoenix, AZ
W. H. Langer, E. Dewitt, D.T. Adams, T. O’Briens
2010, Mining Engineering (62) 27-31
The annual consumption of sand and gravel aggregate in 2006 in the Phoenix, AZ metropolitan area was about 76 Mt (84 million st) (USGS, 2009), or about 18 t (20 st) per capita. Quaternary alluvial deposits in the modern stream channel of the Agua Fria River west of Phoenix are...
Decadal-timescale estuarine geomorphic change under future scenarios of climate and sediment supply
N. K. Ganju, D. H. Schoellhamer
2010, Estuaries and Coasts (33) 15-29
Future estuarine geomorphic change, in response to climate change, sea-level rise, and watershed sediment supply, may govern ecological function, navigation, and water quality. We estimated geomorphic changes in Suisun Bay, CA, under four scenarios using a tidal-timescale hydrodynamic/sediment transport model. Computational expense and data needs were reduced using the morphological...
Plant community, primary productivity, and environmental conditions following wetland re-establishment in the Sacramento-San Joaquin Delta, California
R. L. Miller, R. Fujii
2010, Wetlands Ecology and Management (18) 1-16
Wetland restoration can mitigate aerobic decomposition of subsided organic soils, as well as re-establish conditions favorable for carbon storage. Rates of carbon storage result from the balance of inputs and losses, both of which are affected by wetland hydrology. We followed the effect of water depth (25 and 55 cm)...
Seasonal groundwater contribution to crop-water use assessed with lysimeter observations and model simulations
Y. Luo, M. Sophocleous
2010, Journal of Hydrology (389) 325-335
Groundwater evaporation can play an important role in crop-water use where the water table is shallow. Lysimeters are often used to quantify the groundwater evaporation contribution influenced by a broad range of environmental factors. However, it is difficult for such field facilities, which are operated under limited conditions within limited...
Incubating rainbow trout in soft water increased their later sensitivity to cadmium and zinc
Christopher A. Mebane, Daniel P. Hennessy, Frank S. Dillon
2010, Water, Air, & Soil Pollution (205) 245-250
Water hardness is well known to affect the toxicity of some metals; however, reports on the influence of hardness during incubation or acclimation on later toxicity to metals have been conflicting. We incubated rainbow trout (Oncorhynchus mykiss) near the confluence of two streams, one with soft water and...
Use of induced polarization to characterize the hydrogeologic framework of the zone of surface‐water/groundwater exchange at the Hanford 300 Area, WA
Lee Slater, Dimitrios Ntarlagiannis, Frederick D. Day-Lewis, Kisa Mwakanyamale, John W. Lane Jr., Andy Ward, Roelof J. Versteeg
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
An extensive continuous waterborne electrical imaging (CWEI) survey was conducted along the Columbia River corridor adjacent to the U.S. Department of Energy (DOE) Hanford 300 Area, WA, in order to improve the conceptual model for exchange between surface water and U‐contaminated groundwater. The primary objective was to determine spatial variability...
Composition, distribution, and potential toxicity of organochlorine mixtures in bed sediments of streams
Patrick J. Phillips, Lisa H. Nowell, Robert J. Gilliom, Naomi Nakagaki, Karen Riva-Murray, Carolyn VanAlstyne
2010, Science of the Total Environment (408) 594-606
Mixtures of organochlorine compounds have the potential for additive or interactive toxicity to organisms exposed in the stream. This study uses a variety of methods to identify mixtures and a modified concentration-addition approach to estimate their potential toxicity at 845 stream sites across the United States sampled between 1992 and...
The cleaning of burned and contaminated archaeological maize prior to 87Sr/86Sr analysis
Larry V. Benson, Howard E. Taylor, Terry I. Plowman, David A. Roth, Ronald C. Antweiler
2010, Journal of Archaeological Science (37) 84-91
Accurate trace-metal and strontium-isotope analyses of archaeological corn cobs require that metal contaminants be removed prior to chemical analysis. Archaeological cobs are often coated with construction debris, dust, or soil which contains mineral particles. In addition, most archaeological cobs are partially or completely burned and the burned parts incorporate mineral...
Debris flows resulting from glacial-lake outburst floods in tibet, China
P. Cui, C. Dang, Z. Cheng, K. Scott
2010, Physical Geography (31) 508-527
During the last 70 years of general climatic amelioration, 18 glacial-lake outburst floods (GLOFs) and related debris flows have occurred from 15 moraine-dammed lakes in Tibet, China. Catastrophic loss of life and property has occurred because of the following factors: the large volumes of water discharged, the steep gradients of...
Estimating flood frequency
David A. Eash
Cornelia Fleischer Mutel, editor(s)
2010, Book chapter, A watershed year: Anatomy of the Iowa floods of 2008
No abstract available....
In vitro studies evaluating leaching of mercury from mine waste calcine using simulated human body fluids
John E. Gray, Geoffrey S. Plumlee, Suzette A. Morman, Pablo L. Higueras, James G. Crock, Heather A. Lowers, Mark L. Witten
2010, Environmental Science & Technology (44) 4782-4788
In vitro bioaccessibility (IVBA) studies were carried out on samples of mercury (Hg) mine-waste calcine (roasted Hg ore) by leaching with simulated human body fluids. The objective was to estimate potential human exposure to Hg due to inhalation of airborne calcine particulates and hand-to-mouth ingestion of Hg-bearing calcines. Mine waste...
Estimating groundwater recharge
Richard W. Healy
2010, Book
Understanding groundwater recharge is essential for successful management of water resources and modeling fluid and contaminant transport within the subsurface. This book provides a critical evaluation of the theory and assumptions that underlie methods for estimating rates of groundwater recharge. Detailed explanations of the methods are provided - allowing readers...
Factors influencing the at-sea distribution of Cassin's Auklets (Ptychoramphus aleuticus) that breed in the Channel Islands, California
Josh Adams, John Y. Takekawa, Harry R. Carter, Julie L. Yee
2010, The Auk (127) 503-513
We used radiotelemetry to evaluate at-sea habitat use by Cassin's Auklets (Ptychoramphus aleuticus) that bred at Prince Island, off southern California, from 1999 through 2001. We used logistic regression to compare paired radiotelemetry (presence) with random (pseudo-absence) location-associated habitat variables derived from (1) satellite remote-sensing of sea surface temperature and...
A review of silver-rich mineral deposits and their metallogeny
Frederick Graybeal, Peter G. Vikre
2010, Book chapter, The challenge of finding new mineral resources: Global metallogeny, innovative exploration, and new discoveries; SEG Special Publication 15 Vol. 1
Mineral deposits with large inventories or high grades of silver are found in four genetic groups: (1) volcanogenic massive sulfide (VMS), (2) sedimentary exhalative (SEDEX), (3) lithogene, and, (4) magmatichydrothermal. Principal differences between the four groups relate to source rocks and regions, metal associations, process and timing of mineralization, and...
It's not just about climate change - What about soils?
Martin B. Goldhaber
2010, Elements (6) 359-359
Vladimir Vernadsky was one of the giants of geochemistry. Considered the founder of the fi eld of biogeochemistry and a true pioneer in “whole Earth” studies, he realized by 1945 that “Man under our very eyes is becoming a mighty and ever-growing geological force.” In the intervening 65 years, his...
Panama Canal Watershed Experiment- Agua Salud Project
Robert F. Stallard, Fred L. Ogden, Helmut Elsenbeer, Jefferson S. Hall
2010, Water Resources Impact (12) 17-19
The Agua Salud Project utilizes the Panama Canal’s (Canal) central role in world commerce to focus global attention on the ecosystem services provided by tropical forests. The Canal was one of the great engineering projects in the world. Completed in 1914, after almost a decade of concerted effort, its 80 km...
Measurement of bedload transport in sand-bed rivers: A look at two indirect sampling methods
Robert R. Holmes Jr.
John R. Gray, Jonathan B. Laronne, Jeffrey D. G. Marr, editor(s)
2010, Book chapter, Bedload-surrogate monitoring technologies
Sand-bed rivers present unique challenges to accurate measurement of the bedload transport rate using the traditional direct sampling methods of direct traps (for example the Helley-Smith bedload sampler). The two major issues are: 1) over sampling of sand transport caused by “mining” of sand due to the flow disturbance induced...
Mercury dynamics in relation to dissolved organic carbon concentration and quality during high flow events in three northeastern U.S. streams
Jason A. Dittman, James B. Shanley, Charles T. Driscoll, George R. Aiken, Ann T. Chalmers, Janet E. Towse, Pranesh Selvendiran
2010, Water Resources Research (46)
Mercury (Hg) contamination is widespread in remote areas of the northeastern United States. Forested uplands have accumulated a large reservoir of Hg in soil from decades of elevated anthropogenic deposition that can be released episodically to stream water during high flows. The objective of this study was to evaluate spatial...
Historical deposition of mercury and selected trace elements to high-elevation National Parks in the Western U.S. inferred from lake-sediment cores
M. Alisa Mast, David J. Manthorne, David A. Roth
2010, Atmospheric Environment (44) 2577-2586
Atmospheric deposition of Hg and selected trace elements was reconstructed over the past 150 years using sediment cores collected from nine remote, high-elevation lakes in Rocky Mountain National Park in Colorado and Glacier National Park in Montana. Cores were age dated by 210Pb, and sedimentation rates were determined using the...
Source water controls on the character and origin of dissolved organic matter in streams of the Yukon River basin, Alaska
Jonathan A. O’Donnell, George R. Aiken, Evan S. Kane, Jeremy B. Jones
2010, Journal of Geophysical Research G: Biogeosciences (115) 1-12
Climate warming and permafrost degradation at high latitudes will likely impact watershed hydrology, and consequently, alter the concentration and character of dissolved organic carbon (DOC) in northern rivers. We examined seasonal variation of DOC chemistry in 16 streams of the Yukon River basin, Alaska. Our primary objective was to evaluate...
Response of aquatic macrophytes to human land use perturbations in the watersheds of Wisconsin lakes, U.S.A.
Laura L. Sass, Michael A. Bozek, Jennifer A. Hauxwell, Kelly Wagner, Susan Knight
2010, Aquatic Botany (93) 1-8
Aquatic macrophyte communities were assessed in 53 lakes in Wisconsin, U.S.A. along environmental and land use development gradients to determine effects human land use perturbations have on aquatic macrophytes at the watershed and riparian development scales. Species richness and relative frequency were surveyed in lakes from two ecoregions: the Northern...
August 2008 eruption of Kasatochi volcano, Aleutian Islands, Alaska-resetting an Island Landscape
William E. Scott, Christopher J. Nye, Christopher F. Waythomas, Christina A. Neal
2010, Arctic, Antarctic, and Alpine Research (42) 250-259
Kasatochi Island, the subaerial portion of a small volcano in the western Aleutian volcanic arc, erupted on 7-8 August 2008. Pyroclastic flows and surges swept the island repeatedly and buried most of it and the near-shore zone in decimeters to tens of meters of deposits. Several key seabird rookeries in...
Environmental drivers of fish functional diversity and composition in the Lower Colorado River Basin
T.K. Pool, J. D. Olden, Joanna B. Whittier, C.P. Paukert
2010, Canadian Journal of Fisheries and Aquatic Sciences (67) 1791-1807
Freshwater conservation efforts require an understanding of how natural and anthropogenic factors shape the present-day biogeography of native and non-native species. This knowledge need is especially acute for imperiled native fishes in the highly modified Lower Colorado River Basin (LCRB), USA. In the present study we employed both a taxonomic...
