Distributed energy-balance modeling of snow-cover evolution and melt in rugged terrain: Tobacco Root Mountains, Montana, USA
S.L. Letsinger, G.A. Olyphant
2007, Journal of Hydrology (336) 48-60
A distributed energy-balance model was developed for simulating snowpack evolution and melt in rugged terrain. The model, which was applied to a 43-km2 watershed in the Tobacco Root Mountains, Montana, USA, used measured ambient data from nearby weather stations to drive energy-balance calculations and to constrain the model of Liston...
Evaluating the accotink creek restoration project for improving water quality, in-stream habitat, and bank stability
S.D. Struck, A. Selvakumar, K. Hyer, T. O’Connor
2007, Conference Paper, Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006
Increased urbanization results in a larger percentage of connected impervious areas and can contribute large quantities of stormwater runoff and significant quantities of debris and pollutants (e.g., litter, oils, microorganisms, sediments, nutrients, organic matter, and heavy metals) to receiving waters. To improve water quality in urban and suburban areas, watershed...
Late Quaternary stratigraphy and luminescence geochronology of the northeastern Mojave Desert
S. A. Mahan, D. M. Miller, C.M. Menges, J. C. Yount
2007, Quaternary International (166) 61-78
The chronology of the Holocene and late Pleistocene deposits of the northeastern Mojave Desert have been largely obtained using radiocarbon ages. Our study refines and extends this framework using optically stimulated luminescence (OSL) to date deposits from Valjean Valley, Silurian Lake Playa, Red Pass, and California Valley. Of particular interest...
Issues, benefits, and problems associated with fishing tournaments in inland waters of the United States: A survey of fishery agency administrators
H.L. Schramm Jr., K.M. Hunt
2007, Fisheries (32) 234-243
A web-based survey was administered to state fisheries agency administrators in 2005 to assess and prioritize the impacts of tournament fishing on management of inland fishery resources. Surveys were completed by fishery administrators of 48 state agencies and the District of Columbia. Respondents rated tournaments as neither strongly benefiting nor...
The science and practice of environmental flows and the role of hydrogeologists
M. Sophocleous
2007, Ground Water (45) 393-401
Conflicts between ecosystems and human needs for fresh water are increasing. The purpose of this paper is to raise awareness in the hydrogeologic community of environmental flows (EFs) and to address the major challenges involved in their protection. Ground water is a key component of EFs, and therefore hydrogeologists are...
Toxicity of 5% rotenone to nonindigenous Asian swamp eels
P. J. Schofield, L.G. Nico
2007, North American Journal of Fisheries Management (27) 453-459
Our primary goal was to determine whether rotenone would be a useful control against introduced populations of Asian swamp eels (family Synbranchidae, genus Monopterus). We report the results of a laboratory experiment comparing the efficacy of various rotenone concentrations (1, 2, 4, and 8 mg of 5% liquid rotenone/L of...
The feasibility of applying immature yard-waste compost to remove nitrate from agricultural drainage effluents: A preliminary assessment
L. Tsui, I.G. Krapac, William R. Roy
2007, Journal of Hazardous Materials (144) 585-589
Nitrate is a major agricultural pollutant found in drainage waters. Immature yard-waste compost was selected as a filter media to study its feasibility for removing nitrate from drainage water. Different operation parameters were tested to examine the denitrification efficiency, including the amounts of compost packed in columns, the flow rate,...
Migration behavior and dispersal of adult spring Chinook salmon released into Lake Scanewa on the upper Cowlitz River during 2005
R.W. Perry, Tobias J. Kock, M.A Kritter, Dennis W. Rondorf
2007, Report
During 2005, we conducted a radio-telemetry study to answer a number of basic questions about the migration behavior of adult Spring Chinook salmon (Oncorhynchus tshawytscha) released into the upper Cowlitz River watershed. We also conducted a pilot study of adult Coho salmon (Oncorhynchus kisutch) using radio-tags recovered from adult spring...
Barite-forming environments along a rifted continental margin, Southern California Borderland
James R. Hein, Robert A. Zierenberg, J. Barry Maynard, Mark D. Hannington
2007, Deep-Sea Research Part II: Topical Studies in Oceanography (54) 1327-1349
The Southern California Continental Borderland (SCCB) is part of the broad San Andreas transform-fault plate boundary that consists of a series of fault-bounded, petroleum-generating basins. The SCCB has high heat flow and geothermal gradients produced by thinned continental crust and Neogene volcanism. Barite deposits in the SCCB occur along faults.Barite...
Geophysical data integration and conditional uncertainty analysis on hydraulic conductivity estimation
A. Rahman, F.T.-C. Tsai, C.D. White, D.A. Carlson, C. S. Willson
2007, Conference Paper, Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006
Integration of various geophysical data is essential to better understand aquifer heterogeneity. However, data integration is challenging because there are different levels of support between primary and secondary data needed to be correlated in various ways. This study proposes a geostatistical method to integrate the hydraulic conductivity measurements and electrical...
Sequential solvent extraction for the modes of occurrence of selenium in coals of different ranks from the Huaibei Coalfield, China
Y. Zhang, Gaisheng Liu, C. L. Chou, L. Wang, Y. Kang
2007, Geochemical Transactions (8)
Forms of selenium in bituminous coal, anthracite, and cokeite (natural coke) from Huaibei Coalfield, Anhui, China, have been determined by sequential solvent extraction. The selenium content in bulk samples is 4.0, 2.4, and 2.0 ??g/g in bituminous coal, anthracite, and cokeite, respectively. The six forms of selenium determined by six-step...
A condensed middle Cenomanian succession in the Dakota Sandstone (Upper Cretaceous), Sevilleta National Wildlife Refuge, Socorro County, New Mexico
Stephen C. Hook, William A. Cobban
2007, New Mexico Geology (29) 75-96
The upper part of the Dakota Sandstone exposed on the Sevilleta National Wildlife Refuge, northern Socorro County, New Mexico, is a condensed, Upper Cretaceous, marine succession spanning the first five middle Cenomanian ammonite zones of the U.S. Western Interior. Farther north in New Mexico these five ammonite zones occur over...
Evidence of lake whitefish spawning in the Detroit River: Implications for habitat and population recovery
E.F. Roseman, G.W. Kennedy, J. Boase, B.A. Manny, T. N. Todd, W. Stott
2007, Journal of Great Lakes Research (33) 397-406
Historic reports imply that the lower Detroit River was once a prolific spawning area for lake whitefish (Coregonus clupeaformis) prior to the construction of the Livingstone shipping channel in 1911. Large numbers of lake whitefish migrated into the river in fall where they spawned on expansive limestone bedrock and gravel...
Interaction and influence of two creeks on Escherichia coli concentrations of nearby beaches: Exploration of predictability and mechanisms
M.B. Nevers, R.L. Whitman, W.E. Frick, Z. Ge
2007, Journal of Environmental Quality (36) 1338-1345
The impact of river outfalls on beach water quality depends on numerous interacting factors. The delivery of contaminants by multiple creeks greatly complicates understanding of the source contributions, especially when pollution might originate up- or down-coast of beaches. We studied two beaches along Lake Michigan that are located between two...
Characterization of microtopography and its influence on vegetation patterns in created wetlands
K. Moser, C. Ahn, Gregory E. Noe
2007, Wetlands (27) 1081-1097
Created wetlands are increasingly used to mitigate wetland loss. Thus, identifying wetland creation methods that enhance ecosystem development might increase the likelihood of mitigation success. Noting that the microtopographic variation found in natural wetland settings may not commonly be found in created wetlands, this study explores relationships between induced microtopography,...
Investigation of the groundwater system at Masaya Caldera, Nicaragua, using transient electromagnetics and numerical simulation
R.E. MacNeil, W. E. Sanford, C.B. Connor, S.K. Sandberg, M. Diez
2007, Journal of Volcanology and Geothermal Research (166) 217-232
The distribution of groundwater beneath Masaya Volcano, in Nicaragua, and its surrounding caldera was characterized using the transient electromagnetic method (TEM). Multiple soundings were conducted at 30 sites. Models of the TEM data consistently indicate a resistive layer that is underlain by one or more conductive layers. These two layers...
Polymorphic microsatellite DNA markers for the Florida manatee (Trichechus manatus latirostris)
K.C. Pause, C. Nourisson, A. Clark, M.E. Kellogg, R. K. Bonde, P.M. McGuire
2007, Molecular Ecology Notes (7) 1073-1076
Florida manatees (Trichechus manatus latirostris) are marine mammals that inhabit the coastal waters and rivers of the southeastern USA, primarily Florida. Previous studies have shown that Florida manatees have low mitochondrial DNA variability, suggesting that nuclear DNA loci are necessary for discriminatory analyses. Here we report 10 polymorphic microsatellite loci...
Temporal variability of submarine groundwater discharge: Assessments via radon and seep meters, the southern carmel coast, Israel
Y. Weinstein, Y. Shalem, W. C. Burnett, P.W. Swarzenski, B. Herut
2007, Conference Paper, IAHS-AISH Publication
Seep meter data from Dor Bay, Israel, showed a steady decrease in submarine groundwater discharge (SGD) rates between March and July 2006 (averages of 34, 10.4 and 1.5 cm d-1 in March, May and July, respectively), while estimates based on radon time series showed remarkably uniform averages (8 cm d-1)....
Apparent climatically induced increase of tree mortality rates in a temperate forest
P. J. van Mantgem, N.L. Stephenson
2007, Ecology Letters (10) 909-916
We provide a first detailed analysis of long-term, annual-resolution demographic trends in a temperate forest. After tracking the fates of 21 338 trees in a network of old-growth forest plots in the Sierra Nevada of California, we found that mortality rate, but not the recruitment rate, increased significantly over the...
High-resolution measurements of suspended-sediment
David J. Topping, Scott Wright, Theodore S. Melis, David M. Rubin
2007, Conference Paper, Proceedings of the Tenth International Symposium on River Sedimentation, August 1-4, 2007, Moscow, Russia
No abstract available....
Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA
G. N. Delin, R. W. Healy, D. L. Lorenz, J. R. Nimmo
2007, Journal of Hydrology (334) 231-249
Regional ground-water recharge estimates for Minnesota were compared to estimates made on the basis of four local- and basin-scale methods. Three local-scale methods (unsaturated-zone water balance, water-table fluctuations (WTF) using three approaches, and age dating of ground water) yielded point estimates of recharge that represent spatial scales from about 1...
Characterizing dry deposition of mercury in urban runoff
M. Fulkerson, F.N. Nnadi, L.S. Chasar
2007, Water, Air, & Soil Pollution (185) 21-32
Stormwater runoff from urban surfaces often contains elevated levels of toxic metals. When discharged directly into water bodies, these pollutants degrade water quality and impact aquatic life and human health. In this study, the composition of impervious surface runoff and associated rainfall was investigated for several storm events at an...
Weirs: Counting and sampling adult salmonids in streams and rivers
Christian E. Zimmerman, Laura M. Zabkar
2007, Book chapter, Salmonid field protocols handbook: techniques for assessing status and trends in salmon and trout populations.
Weirs—which function as porous barriers built across stream—have long been used to capture migrating fish in flowing waters. For example, the Netsilik peoples of northern Canada used V-shaped weirs constructed of river rocks gathered onsite to capture migrating Arctic char Salvelinus alpinus (Balikci 1970). Similarly, fences constructed of stakes and...
Multiscale habitat selection by burrowing owls in black-tailed prairie dog colonies
S.J. Lantz, C.J. Conway, S.H. Anderson
2007, Journal of Wildlife Management (71) 2664-2672
Some populations of western burrowing owls (Athene cunicularia hypugaea) have declined in recent decades. To design and implement effective recovery efforts, we need a better understanding of how distribution and demographic traits are influenced by habitat quality. To this end, we measured spatial patterns of burrowing owl breeding habitat selection...
Physical and temporal isolation of mountain headwater streams in the western Mojave Desert, Southern California
J. A. Izbicki
2007, Journal of the American Water Resources Association (43) 26-40
Streams draining mountain headwater areas of the western Mojave Desert are commonly physically isolated from downstream hydrologic systems such as springs, playa lakes, wetlands, or larger streams and rivers by stream reaches that are dry much of the time. The physical isolation of surface flow in these streams may be...
