Surface water qualit: Revisiting nitrate concentrations in the Des Moines River: 1945 and 1976-2001
G.F. McIsaac, R.D. Libra
2003, Journal of Environmental Quality (32) 2280-2289
Recent compilations of historical and contemporary riverine nitrate (NO3) concentrations indicate that concentrations in many rivers in the north-central USA increased during the second half of the 20th century. The Des Moines River near Des Moines, Iowa, however, was reported to have had similar NO3 concentrations in 1945 and the 1980s,...
Automated storm water sampling on small watersheds
R. D. Harmel, K. W. King, R.M. Slade
2003, Applied Engineering in Agriculture (19) 667-674
Few guidelines are currently available to assist in designing appropriate automated storm water sampling strategies for small watersheds. Therefore, guidance is needed to develop strategies that achieve an appropriate balance between accurate characterization of storm water quality and loads and limitations of budget, equipment, and personnel. In this article, we...
Initial river test of a monostatic RiverSonde streamflow measurement system
C.C. Teague, D.E. Barrick, P.M. Lilleboe, R. T. Cheng
Rizoli J.A., editor(s)
2003, Conference Paper, Proceedings of the IEEE Working Conference on Current Measurement
A field experiment was conducted on May 7-8, 2002 using a CODAR RiverSonde UHF radar system at Vernalis, California on the San Joaquin River. The monostatic radar configuration on one bank of the river, with the antennas looking both upriver and downriver, provided very high-quality data. Estimates of both along-river...
Evaluation of chemical coagulation-flocculation aids for the removal of suspended solids and phosphorus from intensive recirculating aquaculture effluent discharge
J.M. Ebeling, P.L. Sibrell, S.R. Ogden, S.T. Summerfelt
2003, Aquacultural Engineering (29) 23-42
An evaluation of two commonly used coagulation-flocculation aids (alum and ferric chloride) was conducted for the supernatant overflow from settling cones used to treat the effluent from microscreen filters in an intensive recirculating aquaculture system. In addition to determining the effectiveness of these aids in removing both suspended solids and...
Climate change and Arctic ecosystems: 1. Vegetation changes north of 55°N between the last glacial maximum, mid-Holocene, and present
N.H. Bigelow, L.B. Brubaker, M. E. Edwards, S. P. Harrison, I. C. Prentice, P. M. Anderson, A.A. Andreev, P. J. Bartlein, T.R. Christensen, W. Cramer, J.O. Kaplan, A.V. Lozhkin, N.V. Matveyeva, D.F. Murray, A. D. McGuire, V.Y. Razzhivin, J.C. Ritchie, B. Smith, D.A. Walker, K. Gajewski, V. Wolf, B.H. Holmqvist, Y. Igarashi, K. Kremenetskii, A. Paus, M.F.J. Pisaric, V.S. Volkova
2003, Journal of Geophysical Research D: Atmospheres (108)
A unified scheme to assign pollen samples to vegetation types was used to reconstruct vegetation patterns north of 55??N at the last glacial maximum (LGM) and mid-Holocene (6000 years B.P.). The pollen data set assembled for this purpose represents a comprehensive compilation based on the work of many projects and...
Modeling precipitation and sorption of elements during mixing of river water and porewater in the Coeur d'Alene River basin
Laurie S. Balistrieri, S. E. Box, J.W. Tonkin
2003, Environmental Science & Technology (37) 4694-4701
Reddish brown flocs form along the edge of the Coeur d'Alene River when porewater drains into river water during the annual lowering of water level in the basin. The precipitates are efficient scavengers of dissolved elements and have characteristics that may make metals associated with them bioavailable. This work characterizes...
The composition and morphology of amphiboles from the Rainy Creek complex, near Libby, Montana
G.P. Meeker, A.M. Bern, I. K. Brownfield, H.A. Lowers, S. J. Sutley, T.M. Hoefen, J.S. Vance
2003, American Mineralogist (88) 1955-1969
Thirty samples of amphibole-rich rock from the largest mined vermiculite deposit in the world in the Rainy Creek alkaline-ultramafic complex near Libby, Montana, were collected and analyzed. The amphibole-rich rock is the suspected cause of an abnormally high number of asbestos-related diseases reported in the residents of Libby, and in...
Setting an effective TMDL: Sediment loading and effects of suspended sediment on fish
B. Vondracek, J. K. H. Zimmerman, J.V. Westra
2003, Journal of the American Water Resources Association (39) 1005-1015
The Agricultural Drainage and Pesticide Transport model was used to examine the relationship between fish and suspended sediment in the context of a proposed total maximum daily load (TMDL) in two agricultural watersheds in Minnesota. During a 50-year simulation, Wells Creek, a third-order cold water stream, had an estimated 1,164 events (i.e., one or more...
Location of long-period events below Kilauea Volcano using seismic amplitudes and accurate relative relocation
J. Battaglia, J.-L. Got, P. Okubo
2003, Journal of Geophysical Research B: Solid Earth (108)
We present methods for improving the location of long-period (LP) events, deep and shallow, recorded below Kilauea Volcano by the permanent seismic network. LP events might be of particular interest to understanding eruptive processes as their source mechanism is assumed to directly involve fluid transport. However, it is usually difficult...
Extreme 34S depletions in ZnS at the Mike gold deposit, Carlin Trend, Nevada: Evidence for bacteriogenic supergene sphalerite
T.M. Bawden, M.T. Einaudi, B.C. Bostick, A. Meibom, J. Wooden, J.W. Norby, M.J.T. Orobona, C. P. Chamberlain
2003, Geology (31) 913-916
We identified submicrometer-sized framboidal sphalerite (ZnS) below the base of supergene oxidation in a Carlin-type gold deposit of Eocene age in Nevada, United States, where the framboidal sphalerite forms a blanket-like body containing >400,000 metric tons of zinc. Framboidal sphalerite <0.1 ??m in diameter, formed in the early Miocene, ranges...
Geomorphic, water quality and fish community patterns associated with the distribution of Notropis topeka in a Central Missouri Watershed
M.A. Bayless, M.G. McManus, J.F. Fairchild
2003, American Midland Naturalist (150) 58-72
The Topeka shiner (Notropis topeka) is a small native cyprinid species that has declined throughout its range in the Central Great Plains Region of the United States. Declines of the species have been associated with numerous factors including water quality, physical habitat alteration and predation. The N. topeka occurs in...
The petrographic microscope: Evolution of a mineralogical research instrument
D. E. Kile
2003, Mineralogical Record (1) 5-39
The petrographic microscope, designed to observe and measure the optical properties of minerals as a means of identifying them, has provided a foundation for mineralogical and petrological research for more than 120 years. Much of what is known today in these fields is attributable to this instrument, the development of...
Mercury from mineral deposits and potential environmental impact
J. J. Rytuba
2003, Environmental Geology (43) 326-338
Mercury deposits are globally distributed in 26 mercury mineral belts. Three types of mercury deposits occur in these belts: silica-carbonate, hot-spring, and Almaden. Mercury is also produced as a by-product from several types of gold-silver and massive sulfide deposits, which account for 5% of the world's production. Other types of...
The Willet (Catoptrophorus semipalmatus)
P.M. Sanzenbacher, Susan M. Haig
David B. Marshall, Matthew G. Hunter, Alan Contreras, editor(s)
2003, Book chapter, Birds of Oregon: A general reference
No abstract available....
A reservoir of nitrate beneath desert soils
Michelle Ann Walvoord, Fred M. Phillips, David A. Stonestrom, R. Dave Evans, Peter C. Hartsough, Brent D. Newman, Robert G. Striegl
2003, Science (302) 1021-1024
A large reservoir of bioavailable nitrogen (up to ∼104 kilograms of nitrogen per hectare, as nitrate) has been previously overlooked in studies of global nitrogen distribution. The reservoir has been accumulating in subsoil zones of arid regions throughout the Holocene. Consideration of the subsoil reservoir raises estimates of vadose-zone nitrogen...
Differences in native soil ecology associated with invasion of the exotic annual chenopod, Halgeton glomeratus
Jeffrey J. Duda, D. Carl Freeman, John M. Emlen, Jayne Belnap, Stanley G. Kitchen, John C. Zak, Edward Sobek, Mary Tracy, James Montante
2003, Biology and Fertility of Soils (38) 72-77
Various biotic and abiotic components of soil ecology differed significantly across an area whereHalogeton glomeratus is invading a native winterfat, [ Krascheninnikovia (= Ceratoides) lanata] community. Nutrient levels were significantly different among the native, ecotone, and exotic-derived soils. NO3, P, K, and Na all increased as the...
Post-Depositional Behavior of Cu in a Metal-Mining Polishing Pond (East Lake, Canada)
A.J. Martin, J.L. Jambor, Thomas F. Pedersen, John Crusius
2003, Environmental Science & Technology (37) 4925-4933
The post-depositional behavior of Cu in a gold-mining polishing pond (East Lake, Canada) was assessed after mine closure by examination of porewater chemistry and mineralogy. The near-surface (upper 1.5 cm) sediments are enriched in Cu, with values ranging from 0.4 to 2 wt %. Mineralogical examination revealed that the bulk...
History and ecology of chloroethene biodegradation: A review
Paul M. Bradley
2003, Bioremediation Journal (7) 81-109
No abstract available....
The geochemical evolution of riparian ground water in a forested piedmont catchment
Douglas A. Burns, Niel Plummer, Jeffrey J. McDonnell, Eurybiades Busenberg, Gerolamo C. Casile, Carol Kendall, Richard P. Hooper, James E. Freer, Norman E. Peters, Keith Beven, Peter Schlosser
2003, Groundwater (41) 913-925
The principal weathering reactions and their rates in riparian ground water were determined at the Panola Mountain Research Watershed (PMRW) near Atlanta, Georgia. Concentrations of major solutes were measured in ground water samples from 19 shallow wells completed in the riparian (saprolite) aquifer and in one borehole completed in granite,...
Metamorphism within the Chugach accretionary complex on southern Baranof Island, southeastern Alaska
Cathy L. Zumsteg, Glen R. Himmelberg, Susan M. Karl, Peter J. Haeussler
2003, Geological Society of America Special Papers (371) 253-267
On Baranof Island, southeastern Alaska, we identify four metamorphic events that affect rocks associated with the Chugach accretionary complex. This study focuses on the M1 and M4 metamorphic events. Mesozoic schists, gneisses, and migmatitic gneisses exposed near the Kasnyku pluton on central Baranof Island represent the M1 metamorphic rocks. These...
Changes in the timing of high river flows in New England over the 20th Century
G.A. Hodgkins, R. W. Dudley, T.G. Huntington
2003, Journal of Hydrology (278) 244-252
The annual timing of river flows is a good indicator of climate-related changes, or lack of changes, for rivers with long-term data that drain unregulated basins with stable land use. Changes in the timing of annual winter/spring (January 1 to May 31) and fall (October 1 to December 31) center...
Phylogeny and genetic diversity of Bridgeoporus nobilissimus inferred using mitochondrial and nuclear rDNA sequences
G.L. Redberg, D.S. Hibbett, J.F. Ammirati Jr., R. J. Rodriguez
2003, Mycologia (95) 836-845
The genetic diversity and phylogeny of Bridgeoporus nobilissimus have been analyzed. DNA was extracted from spores collected from individual fruiting bodies representing six geographically distinct populations in Oregon and Washington. Spore samples collected contained low levels of bacteria, yeast and a filamentous fungal species. Using taxon-specific PCR primers, it was...
Groundwater flow, heat transport, and water table position within volcanic edifices: Implications for volcanic processes in the Cascade Range
S. Hurwitz, K.L. Kipp, S. E. Ingebritsen, M.E. Reid
2003, Journal of Geophysical Research B: Solid Earth (108)
The position of the water table within a volcanic edifice has significant implications for volcano hazards, geothermal energy, and epithermal mineralization. We have modified the HYDROTHERM numerical simulator to allow for a free-surface (water table) upper boundary condition and a wide range of recharge rates, heat input rates, and thermodynamic...
The morphology and migration of transverse bars off the west-central Florida coast
G. Gelfenbaum, G. R. Brooks
2003, Marine Geology (200) 273-289
A series of migrating shore-normal sandbars with wavelengths of 75-120 m and heights up to 2 m have been identified off the northern tip of Anna Maria Island, a barrier island on the west-central Florida coast. Similar features have been described elsewhere since the 1930s and termed 'transverse bars'. The...
An adenovirus associated with intestinal impaction and mortality of male common eiders (Somateria mollissima) in the Baltic Sea
Tuula E. Hollmén, J. Christian Franson, Mikaei Kilpi, Douglas E. Docherty, V. Myllys
2003, Journal of Wildlife Diseases (39) 114-120
We examined 10 common eider (Somateria mollissima) males found dead in 1998 during a die-off in the northern Baltic Sea off the southwestern coast of Finland. We diagnosed impaction of the posterior small intestine with mucosal necrosis as the cause of death in all 10 and isolated adenoviruses from cloacal...
