Results 191 to 200 of about 462,478 (222)

A mixing model to incorporate uncertainty in sediment fingerprinting

Geoderma, 2014
Abstract Information on sediment sources is required for effective sediment control strategies, to understand nutrient and pollutant transport, and for developing soil erosion models. Uncertainty associated with sediment fingerprinting mixing models is often substantial, but this uncertainty has not yet been fully incorporated in these models.
Kazem Nosrati, Gerard Govers, Brice X. Semmens, Eric J. Ward   +3 more
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The importance of foreplay in sediment fingerprint studies

2020
Ein oft genutztes Mittel um die relativen Erosionsbeiträge verschiedener Quellen in einem mittelgroßem bis großem Einzugsgebiet abzuschätzen ist das sogenannte sediment fingerprinting. Dafür wird das in Senken abgelagerte Sediment sowie Bodenproben der Quellen (z.B. Landnutzung, Lithologie, usw.) auf ihre Tracer-Zusammensetzung (z.B. Geochemie, Pollen,
openaire   +1 more source

Application of Sediment Fingerprinting to Apportion Sediment Sources: Using Machine Learning Models

Journal of the ASABE, 2023
Highlights Relative source contributions to stream bed sediment from construction sites and stream banks were quantified. Two machine-learning techniques were used to select composite fingerprinting properties.
Kritika Malhotra, Jingyi Zheng, Ash Abebe, Jasmeet Lamba   +3 more
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A numerical model to develop long-term sediment budgets using isotopic sediment fingerprints

Computers & Geosciences, 2013
Developing accurate long-term, basin-scale sediment budgets using isotopic sediment fingerprints requires a sediment routing model that not only accounts for a range of sediment source terms (e.g. tributaries, surface erosion and erosion of bluffs and terraces) but also considers the variation in time of volume and tracer concentration for the sediment
Viparelli E, Lauer JW, Belmont P, Parker G   +3 more
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Fingerprinting suspended sediment sources in a large urban river system

The Science of The Total Environment, 2003
Very few studies have attempted to quantify the sources of suspended sediment transported in urban river systems. In this study, statistically verified composite fingerprints and a multivariate mixing model have been used to identify the main sources of the suspended sediment transported by the River Aire and its main tributary, the River Calder ...
Julie, Carter, Philip N, Owens, Desmond E, Walling, Graham J L, Leeks   +3 more
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Testing the sediment fingerprinting technique using the SIAR model with artificial sediment mixtures

Journal of Soils and Sediments, 2020
The accurate identification of primary sediment sources in a watershed is necessary to implement targeted management practices that will reduce erosion and restore water quality. Sediment fingerprinting is a commonly used tool to accomplish this task. However, the accuracy and precision of different procedures to select tracers for un-mixing sediment ...
Yanchong Huangfu, Michael E. Essington, Shawn A. Hawkins, Forbes R. Walker, John S. Schwartz, Alice C. Layton   +5 more
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Elemental Association and Fingerprinting of Traffic-Related Metals in Road Sediments

Environmental Science & Technology, 2000
Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) can be used for the study of elemental associations in solid environmental matrices through direct ablation. The elemental associations of Pb and platinum group metals (PGMs) in road sediments were investigated by ablating the sediment surface followed by multielemental analysis by
Sébastien Rauch, Gregory M. Morrison, Mikael Motelica-Heino, Olivier F. X. Donard, Myriam Muris   +4 more
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Antarctic marine sediments as fingerprints of pollution migration

Journal of Radioanalytical and Nuclear Chemistry, 2001
Forty elements in 21 coastal marine sediment samples collected duringthe second Antarctic scientific expedition from 18 different sites of Brekilenarea located at the coast of Antarctica were analysed by instrumental neutronactivation analysis (INAA) to detect eventual pollution.
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Fingerprinting sources of reservoir sediment via two modelling approaches

Science of The Total Environment, 2019
Reliable quantitative information about sediment sources is a key requirement for river catchment management, especially in settings with high sediment loads. This study explores the potential for using source fingerprinting techniques to establish the relative contribution of three sub-basins to the sediment deposited in a reservoir impounded by an ...
Samaneh Habibi, Hamid Gholami, Aboalhasan Fathabadi, John D. Jansen   +3 more
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‘Fingerprinting’ petroleum hydrocarbons in bottom sediment, plankton, and sediment trap collected seston

Marine Pollution Bulletin, 1987
Abstract Water carried particulate matter (seston) collected in sediment traps has been used for fingerprinting petrogenic hydrocarbons (PHC) along an urban influenced transect in the Stockholm archipelago. Gas-chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) have been used for identification and quantification of n-alkanes, the ...
Dag Broman, Anders Colmsjö, Björn Ganning, Carina Näf, Yngve Zebühr, Conny Östman   +5 more
openaire   +1 more source