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Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Reviews is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Geotechnical Journal is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Environmental Engineering & Science is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Geotechnical Journal is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Geotechnical Journal is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Geomorphic and chronologic evidence from Amund and Ellef Ringnes islands documents the configuration, dynamics, and collapse of the northwest sector of the Innuitian Ice Sheet. These data record the inundation of the Ringnes Islands by northwestward-flowing ice from divides spanning the alpine and lowland sectors of the Innuitian Ice Sheet. Ice-flow indicators and granite dispersal along eastern Around Ringnes Island suggest Massey Sound was filled by an ice stream discharging coalescent alpine and lowland ice from Norwegian Bay. In contrast, the interior of Amund Ringnes Island was overridden by predominantly non-erosive, granite-free ice from a divide in the lowland sector of the ice sheet. Glacial landforms on Ellef Ringnes Island record coverage by largely non-erosive ice, but it remains uncertain whether these features relate to northward-flowing lowland ice or a cold-based local ice cap. Deglaciation of the Ringnes Islands commenced -10 000 [sup4]14C years ago. Deglacial dates between 9.7 and 9.2 ka BP record the sequential entry of marine fauna along Massey and Hassel sounds, concomitant with the southward retreat of trunk ice towards Norwegian Bay. These data suggest marine-based trunk glaciers were vulnerable to calving during pre-Holocene eustatic sea-level rise. However, deglacial dates from inner embayments indicate that residual ice caps persisted on Amund and Ellef Ringnes islands for 800 to 1400 14C years after retreat of trunk ice from the adjacent marine channels. Lateral meltwater channels record the subsequent retreat of these ice caps, which became increasingly confined within upland valleys after 8.6 ka BP. [ABSTRACT FROM AUTHOR]

Copyright of Environmental Reviews is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper evaluates the National Centers for Environmental Prediction - National Center for Atmospheric Research (NCEP-NCAR) reanalyses hydroclimatic data as an initial check for assessment of hydrologic impacts of climate change at the basin scale. A reanalysis dataset for daily precipitation, maximum temperature, and minimum temperature from the NCEP-NCAR global (NNGR) and regional (North American Regional Reanalysis or NARR) reanalysis project has been used as input into the semidistributed hydrologic model (Hydrologic Engineering Center Hydraulic Modeling System or HEC-HMS) for the period 1980-2005. An extensive analysis has been performed for assessing the performance of the reanalysis data generated flows compared with the observed inputs during May-November. The stream flows generated from the NARR dataset show encouraging results in simulating summertime low flows with less variability and fewer errors. The results indicate that NNGR results are less accurate and highly variable. This study suggests that NARR can be adequately used as an alternative in data-scarce regions. Le présent article évalue les nouvelles analyses des « NCEP-NCAR (« National Centers for Environmental Prediction-National Center for Atmospheric Research) » de données hydroclimatiques pour une vérification initiale de l’évaluation des impacts hydrologiques des changements climatiques à l’échelle du bassin. L’ensemble de données pour la nouvelle analyse des précipitations quotidiennes, de la température maximale et de la température minimale du projet de nouvelle analyse « NCEP-NCAR » (a) global (« NNGR ») et (b) régional (« NARR ») a été utilisé comme intrant dans le modèle hydrologique semi-réparti (« HEC-HMS ») pour la période 1980-2005. Une analyse approfondie a été réalisée afin d’évaluer le rendement des données des débits générés par la nouvelle analyse par rapport aux intrants observés entre mai et novembre. Les débits d’eau générés à partir de l’ensemble de données NARR montrent un résultat encourageant pour la simulation des faibles débits d’étiage comportant moins de variabilité et d’erreurs. Les résultats ont indiqué que les résultats NNGR sont moins précis et très variables. La présente étude suggère que NARR peut être utilisé adéquatement comme solution de remplacement dans les régions pour lesquelles les données sont peu abondantes. [ABSTRACT FROM AUTHOR]

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

We present new [sup 40] Ar/[sup 39] Ar ages for hornblende, muscovite, and biotite from metamorphic and plutonic rocks from the Yukon–Tanana Upland, Alaska. Integration of our data with published [sup 40] Ar/[sup 39] Ar, kinematic, and metamorphic pressure (P) and temperature (T) data confirms and refines the complex interaction of metamorphism and tectonism proposed for the region. The oldest metamorphic episode(s) postdates Middle Permian magmatism and predates the intrusion of Late Triassic (215–212 Ma) granitoids into the Fortymile River assemblage (Taylor Mountain assemblage of previous papers). In the eastern Eagle quadrangle, rapid and widespread Early Jurassic cooling is indicated by ~188–186 Ma [sup 40] Ar/[sup 39] Ar plateau ages for hornblende from plutons that intrude the Fortymile River assemblage, and for metamorphic minerals from the Fortymile River assemblage and the structurally underlying Nasina assemblage. We interpret these Early Jurassic ages to represent cooling resulting from northwest-directed contraction that emplaced the Fortymile River assemblage onto the Nasina assemblage to the north as well as the Lake George assemblage to the south. This cooling was the final stage of a continuum of subduction-related contraction that produced crustal thickening, intermediate- to high-P metamorphism within both the Fortymile River assemblage and the structurally underlying Lake George assemblage, and Late Triassic and Early Jurassic plutonism in the Fortymile River and Nasina assemblages. Although a few metamorphic samples from the Lake George assemblage yield Jurassic [sup 40] Ar/[sup 39] Ar cooling ages, most yield Early Cretaceous [sup 40] Ar/[sup 39] Ar ages: hornblende ~135–115 Ma, and muscovite and biotite ~110–108 Ma. We interpret the Early Cretaceous metamorphic cooling, in most areas, to have resulted from regional extension and exhumation of the lower plate, previously tectonically thickened during Early Jurassic and older convergence.Nous présentons de nouveaux âges [sup 40] Ar/[sup 39] Ar pour de la hornblende, de la muscovite et de la biotite provenant de roches plutoniques et métamorphiques des hautes terres du Yukon–Tanana, en Alaska. L'intégration de nos données à des données publiées d'âges [sup 40] Ar/[sup 39] Ar, de cinématique et de P et T métamorphiques confirment et précisent l'interaction complexe entre le métamorphisme et la tectonique proposée pour la région. L'épisode métamorphique le plus ancien est plus jeune que le magmatisme du Permien moyen mais il s'est produit avant l'intrusion des granitoïdes du Trias tardif (215–212 MA) dans l'assemblage de Fortymile River (assemblage de Taylor Mountain dans des documents antérieurs). Dans le quadrilatère Eagle est, un refroidissement rapide et répandu, au Jurassique précoce, est indiqué par un palier d'âges [sup 40] Ar/[sup 39] Ar ~188 à 186 Ma pour de la hornblende provenant de plutons qui pénètrent l'assemblage de Fortymile River ainsi que pour des minéraux métamorphiques de l'assemblage de Fortymile River et pour l'assemblage structurellement sous-jacent de Nasina. Nous interprétons ces âges de Jurassique précoce comme le résultat d'un refroidissement de contraction à direction nord-ouest qui a mis en place l'assemblage de Fortymile River sur l'assemblage de Nasina au nord ainsi que sur l'assemblage de Lake George au sud. Ce refroidissement a été l'étape finale d'un continuum de contraction relié à la subduction qui a produit un épaississement de la croûte, du métamorphisme à pression intermédiaire à élevée à l'intérieur de l'assemblage de Fortymile River ainsi que dans l'assemblage de Lake George qui lui est structurellement sous-jacent et du plutonisme, au Trias tardif et au Jurassique précoce, dans les assemblages de Fortymile River et de Nasina. Bien que quelques échantillons métamorphiques provenant de l'assemblage de Lake George aient donné des âges de refroidissement [sup 40] Ar/[sup 39] Ar indiquant le Jurassique, la plupart ont donné des âges [sup 40] Ar/[sup 39] Ar indiquant le Crétacé précoce : soit la hornblende ~ 135–115 Ma et la muscovite et la biotite ~ 110–108 Ma. Dans la plupart des régions, nous croyons que le refroidissement métamorphique du Crétacé précoce a été causé par une extension régionale et l'exhumation de la plaque inférieure, laquelle avait été épaissie tectoniquement au cours d'une convergence survenue au Jurassique précoce et même avant.[Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]

Tall buildings, or skyscrapers, are icons of cities, symbols of corporate power, and a mark of national pride. Certain skyscrapers, such as the John Hancock Center and the Sears Tower in Chicago, are also marvels of engineering that have paved the way for ever increasing heights of structural systems. Since the 1960s, a series of new structural systems has been introduced with the objective of achieving economically-competitive and aesthetically-pleasing tall buildings without compromising safety. One of the great structural engineers responsible for the new structural systems was Dr. Fazlur Rahman Khan. This paper provides a biographical sketch of Dr. Khan and discusses some of his innovations pertaining to high-rise buildings. It shows that his contributions led to a new vertical scale for the modern day city.Key words: aesthetics, architecture, innovation, structural system, tall building.Les grands édifices, ou gratte-ciel, sont l'emblème des villes, la manifestation symbolique des puissances corporatives, et sont représentatifs de la fierté nationale. Certains gratte-ciel, comme le Centre John Hancock et la Tour Sears à Chicago, sont aussi des merveilles d'ingénierie qui ont pavé la voie à des systèmes structuraux atteignant des hauteurs toujours plus grandes. Depuis les années 60, une série de nouveaux systèmes structuraux a été introduite, avec pour objectif la réalisation de grands édifices compétitifs économiquement et plaisants esthétiquement, sans compromettre la sécurité. L'un des grands ingénieurs en structures responsables de ces nouveaux systèmes structuraux est Dr Fazlur Rahman Khan. Cet article présente un aperçu biographique de Dr Khan et discute quelques-unes de ces innovations se rattachant aux gratte-ciel. L'article montre que sa contribution a mené à une nouvelle échelle verticale pour nos villes modernes.Mots clés : esthétique, architecture, innovation, systèmes structuraux, grand édifice.[Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]

This paper explores the applicability of wavelet transform for the analysis of strong and weak ground motions recorded on rock at Yerba Buena Island and on dredged sandfill at nearby Treasure Island about 2 km away during the 1989 Loma Prieta earthquake in California. An interpretation of the results from this analysis is presented and discussed. The major important feature of this data set is that liquefaction occurred at the Treasure Island site during the strong shaking. The Daubechies 20-coefficient wavelet transform is utilized in this study. Results of the application of the wavelet transform can be summarized as follows: most of the energy of the earthquake at the Treasure Island site is in the frequency range of 0.58-1.77 Hz and arrives in the time interval between 11 and 15 s. For the Yerba Buena Island site, most of the energy lies within the frequency range of 1.15-3.53 Hz and arrives between 8 and 13 s. The analysis indicates that there are some large peaks at the highest resolution in the wavelet transforms at the Treasure Island site, which can be attributed to a progressive change in the stiffness characteristics of the soil. [ABSTRACT FROM AUTHOR]

This paper focuses on the flux and characterization of organic substances in cave drip waters for a continental climate. At Marengo Cave in southern Indiana, there is seasonal variations in organic matter concentration in the cave drip water. High levels are introduced during the spring thaw, and lower levels occur during the rest of the year. The fluorescence spectra and ultrafiltration analysis suggest the majority of the organics contained in percolating waters were fulvic acids, with most being less than 1 kDa in size. The seasonal flush of organics from the soil could produce two different types of calcite in the speleothem deposited from these drip waters, a stronger fluorescing calcite during the spring and the less fluorescent calcite during the rest of the year. This is the first study of its type for this particular climatic region.Cette communication traite de l'écoulement et de la caractérisation des substances organiques dans les eaux de percolation des cavernes dans un climat continental. À Marengo Cave, dans le sud de l'Indiana, la concentration de la matière organique dans les eaux de percolation des cavernes varie selon les saisons. Des niveaux élevés sont introduits durant la fonte printanière et, durant le reste de l'année, les niveaux sont moindres. Les spectres de fluorescence et une analyse par ultrafiltration suggèrent que la majorité des organiques contenus dans les eaux de percolation aient été des acides fulviques dont la plupart avaient une masse de moins de 1 kDa. Le lessivage saisonnier de la matière organique du sol pourrait produire deux différentes sortes de calcites dans le spéléothème qui se dépose à partir de ces eaux de percolation, soit une calcite à forte fluorescence au cours du printemps et une calcite moins fluorescente durant le reste de l'année. Cette communication est la première étude de ce genre pour cette région climatique particulière.[Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]

This paper presents some possible interpretations of the physical meaning of the lumped, toe, and skin Case damping factors, j[sub cL] , j[sub ct] , and j[sub cs] , respectively, which are extensively utilized in the dynamic analysis of pile driveability and capacity. A single degree of freedom model is employed to relate the Case damping to the hysteretic damping ratios of soil and pile materials. This relation and the damping ratios of soils and piles show that the Case damping factors for piles in sandy and clayey soils may overlap at all strain magnitudes. Coupling of pile toe and skin resistance is analyzed, and the j[sub cL] factor is found to be a function of the skin and toe resistance ratio of the pile. Consequently, the j[sub cL] factor is an important indicator with which the skin friction and toe resistance of piles can be separated. A database of 133 cases of dynamic pile tests in Florida has been used to substantiate the analyses and interpretations. The effects of the assumptions made in this paper are also discussed.Key words: pile dynamics, wave equation, Case damping, hysteretic damping, bearing capacity, skin friction.Cet article présente des interprétations possibles de la signification physique des facteurs d'amortissement de diagonale, de pointe, et de fût de Case, j[sub cL] , j[sub ct] et j[sub cs] , qui sont utilisés abondamment en analyse du potentiel de fonçage et de la capacité des pieux. Un modèle à un seul degré de liberté est utilisé pour mettre en relation l'amortissement de Case avec les rapports d'amortissement en hystérèse du sol et des matériaux du pieu. Cette relation ainsi que les rapports d'amortissement des pieux et des sols montrent que les facteurs d'amortissement de Case pour les pieux dans les sols sableux et argileux peuvent chevaucher à toute grandeurs de déformation. Le couplage des résistances en pointe et sur le fût est analysée et l'on trouve que le facteur j[sub cL] est une fonction du rapport de la résistance du fût et de la pointe du pieu. En conséquence, le facteur j[sub cL] est un indicateur important avec lequel la résistance de pointe et le frottement sur le fût des pieux peuvent être séparés. Une base de données de 133 cas d'essais dynamiques de pieux en Floride a été utilisée pour concrétiser les analyses et les interprétations. L'on discute aussi des conséquences des hypothèses utilisées dans cet article. Mots clés : dynamique des pieux, équation des ondes, amortissement de Case, amortissement en hystérèse, capacité portante, frottement sur le fût. [Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Animal Science is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Reviews is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Animal Science is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Reviews is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article presents the study which determined the effects of harvest date on switchgrass (Panicum virgatum L.) forage and silage characteristics and their relationship to specific methane yield from anaerobically digested switchgrass silage. It claims that switchgrass is native of North America. The grass has been studied as an energy crop in the U.S. and Canada.

The article presents an evaluation of the possible invasion of weed species to Canada from the U.S. It examines the potential for invasive plant species to be chosen for one or more of 10 character traits, including high growth rate, broad climatic or environmental tolerance, and short generation time. Among the plant species that were assessed are the Himalayan balsam or Impatiens glandilifera Royle and velvetleaf or Abutilon theophrasti Medic.

Copyright of Canadian Journal of Physics is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Genome is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Reviews is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Physics is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Atmospheric concentrations of elemental (Hg0), reactive gaseous (RGM), and particulate (PHg) mercury were measured at two remote sites in the midwestern United States. Concurrent measurements of Hg0, PHg, and RGM obtained at Devil’s Lake and Mt. Horeb, located approximately 65 km apart, showed that Hg0 and PHg concentrations were affected by regional, as well as local sources, while RGM was mainly impacted by local sources. Plumes reaching the Devil’s Lake site from a nearby coal-fired power plant significantly impacted SO2 and RGM concentrations at Devil’s Lake, but had little impact on Hg0. Our findings suggest that traditional modeling approaches to assess sources of mercury deposited that utilize source emissions and large-scale grids may not be sufficient to predict mercury deposition at sensitive locations due to the importance of small-scale sources and processes. We suggest the use of a receptor-based monitoring to better understand mercury source–receptor relationships. Les concentrations atmosphériques de mercure élémentaire (Hg0), de mercure gazeux réactif (RGM) et de mercure particulaire (PHg) ont été mesurées à deux sites éloignés dans le Midwest américain. Des mesures simultanées du Hg0, du PHg et du RGM au lac Devil et au mont Horeb, situés à environ 65 km l’un de l’autre, ont montré que les concentrations en Hg0 et PHg ont été affectées par des sources régionales et locales tandis que le RGM a été principalement affecté par les sources locales. Les panaches provenant d’une centrale thermique alimentée au charbon située à proximité et atteignant le lac Devil ont un impact significatif sur les concentrations de SO2 et de RGM au lac Devil, mais presque aucun impact sur le Hg0. Selon nos conclusions, les approches de modélisation conventionnelles utilisées pour évaluer les sources de mercure déposé qui utilisent les émissions à la source et de grandes mailles peuvent être incapables de prédire la déposition de mercure aux endroits sensibles en raison de l’importance des petites sources et des procédés à petite échelle. Nous suggérons d’utiliser une surveillance du milieu récepteur afin de mieux comprendre les relations entre la source de mercure et le milieu récepteur. [ABSTRACT FROM AUTHOR]

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Reviews is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Journal of Environmental Engineering & Science is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)