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Journal articles on the topic 'Sediment transfert'

Author: Grafiati

Published: 8 March 2025

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1

Frenette, M., and P. Y. Julien. "LAVSED-I — Un modèle pour prédire l'érosion des bassins et le transfert de sédiments fins dans les cours d'eau nordiques." Canadian Journal of Civil Engineering 13, no. 2 (1986): 150–61. http://dx.doi.org/10.1139/l86-023.

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Computer modeling techniques are used for predicting soil losses from overland flow and subsequent suspended sediment yield from large watersheds. The model LAVSED-I (LAVal SEDidentological model No. 1) is based on the universal soil-loss equation of Wischmeier and Smith and the equation of Kiline and Richardson. The model subdivides the watershed into square units varying in size from 0.3 to 3000 km2 and the computational procedure is subdivided in four components: precipitation, physical characteristics of watersheds, erosion/sedimentation, and land use. This paper describes the operational

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Subardjo, Petrus, Agus Anugroho Dwi Suryoputro, and Ibnu Praktikto. "Sebaran Sedimen Tersuspensi di Perairan Teluk Awur Jepara menggunakan Citra Landsat 8." Buletin Oseanografi Marina 9, no. 1 (2020): 77–82. http://dx.doi.org/10.14710/buloma.v9i1.29111.

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Sedimen tersuspensi dianggap sebagai sedimen yang didistribusikan oleh arus laut. Arus sepanjang pantai (longshore current) berperan besar terhadap proses perpindahan sedimen di perairan. Gelombang laut yang yang membentuk sudut terhadap garis pantai menyebabkan arus sepanjang pantai Transpor sedimen yang disebabkan oleh arus sepanjang panti sering menimbulkan permasalahan erosi pantai dan pendangkalan perairan. Perairan Teluk Awur memiliki bentuk teluk dan tanjung yang memungkinkan terjadinya arus sepanjang pantai. Potensi adanya proses erosi dan sedimentasi di perairan Teluk Awur membuat pen

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3

Gude, Martin, Christer Jonasson, Susanne Dietrich, and Dieter Scherer. "Assessment of Variability in Fluvial Sediment Transfers in Kärkevagge (N-Sweden) during the last 50 Years." Hydrology Research 31, no. 4-5 (2000): 373–84. http://dx.doi.org/10.2166/nh.2000.0022.

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The Kärkevagge (Abisko area, Northern Sweden) represents a focus research basin concerning geomorphic processes and sediment budgets for the last 50 years. Different geomorphic process studies provide comparative data sets concerning climate variability implications on sediment transfers. While monitoring of sediment transfers is discontinuous with respect to study periods and methods, a detailed chronology of high-magnitude events with significant sediment displacement is available. In continuation of these studies, investigations in 1995 and 1998 as part of the MOSAIC project (Modelling Of S

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Cutter, Leah, Kevin R. Sowers, and Harold D. May. "Microbial Dechlorination of 2,3,5,6-Tetrachlorobiphenyl under Anaerobic Conditions in the Absence of Soil or Sediment." Applied and Environmental Microbiology 64, no. 8 (1998): 2966–69. http://dx.doi.org/10.1128/aem.64.8.2966-2969.1998.

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ABSTRACT Bacterial enrichment cultures developed with Baltimore Harbor (BH) sediments were found to reductively dechlorinate 2,3,5,6-tetrachlorobiphenyl (2,3,5,6-CB) when incubated in a minimal estuarine medium containing short-chain fatty acids under anaerobic conditions with and without the addition of sediment. Primary enrichment cultures formed both meta and orthodechlorination products from 2,3,5,6-CB. The lag time preceding dechlorination decreased from 30 to less than 20 days as the cultures were sequentially transferred into estuarine medium containing dried, sterile BH sediment. In ad

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5

Cogez, Antoine, Frédéric Herman, Éric Pelt, et al. "U–Th and <sup>10</sup>Be constraints on sediment recycling in proglacial settings, Lago Buenos Aires, Patagonia." Earth Surface Dynamics 6, no. 1 (2018): 121–40. http://dx.doi.org/10.5194/esurf-6-121-2018.

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Abstract. The estimation of sediment transfer times remains a challenge to our understanding of sediment budgets and the relationships between erosion and climate. Uranium (U) and thorium (Th) isotope disequilibria offer a means of more robustly constraining sediment transfer times. Here, we present new uranium and thorium disequilibrium data for a series of nested moraines around Lago Buenos Aires in Argentine Patagonia. The glacial chronology for the area is constrained using in situ cosmogenic 10Be analysis of glacial outwash. Sediment transfer times within the periglacial domain were estim

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Burd, Brenda J., Christopher J. Lowe, and Carmen Morales-Caselles. "Uptake of PCBs into sediment dwellers and trophic transfer in relation to sediment conditions in the Salish Sea." FACETS 7 (January 1, 2022): 936–65. http://dx.doi.org/10.1139/facets-2021-0032.

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We examined uptake of polychlorinated biphenyls (PCBs) into various marine sediment feeders relative to physical and geochemical factors and transfer to higher trophic levels. PCBs exceeding Canadian Council Ministers of the Environment Guidelines by 6–55× were found in industrialized harbours and some near-outfall sediments, indicating ongoing land input. Sediment PCBs were correlated with organic flux and content. Tissue PCBs were >10× sediment PCBs in all samples and highest in Victoria Harbour infauna, suggesting considerable uptake from these extremely contaminated, organically enriche

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Hull, Erin A., Rebekah R. Stiling, Marco Barajas, Rebecca B. Neumann, Julian D. Olden, and James E. Gawel. "Littoral sediment arsenic concentrations predict arsenic trophic transfer and human health risk in contaminated lakes." PLOS ONE 18, no. 10 (2023): e0293214. http://dx.doi.org/10.1371/journal.pone.0293214.

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Lake sediments store metal contaminants from historic pesticide and herbicide use and mining operations. Historical regional smelter operations in the Puget Sound lowlands have resulted in arsenic concentrations exceeding 200 μg As g-1 in urban lake sediments. Prior research has elucidated how sediment oxygen demand, warmer sediment temperatures, and alternating stratification and convective mixing in shallow lakes results in higher concentrations of arsenic in aquatic organisms when compared to deeper, seasonally stratified lakes with similar levels of arsenic pollution in profundal sediments

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8

Brydon, Julia, Iwata Oh, Julie Wilson, Ken Hall, and Hans Schreier. "Evaluation of Mitigation Methods to Manage Contaminant Transfer in Urban Watersheds." Water Quality Research Journal 44, no. 1 (2009): 1–15. http://dx.doi.org/10.2166/wqrj.2009.002.

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Abstract Three case studies on trace metal contamination in urban stormwater are presented from the Greater Vancouver area of British Columbia. In the first case study, the spatial and temporal variability in trace metals in sediments were determined in the completely urbanized Brunette watershed. A natural lake in the middle of the watershed acts as a sediment detention system, and an analysis of the sediment core showed the historic accumulation of metal and selective organic contaminants in sediments since the early 1800s. Suspended sediments transported during storm events showed significa

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Searcy, Kristin E., Aaron I. Packman, Edward R. Atwill, and Thomas Harter. "Deposition of Cryptosporidium Oocysts in Streambeds." Applied and Environmental Microbiology 72, no. 3 (2006): 1810–16. http://dx.doi.org/10.1128/aem.72.3.1810-1816.2006.

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ABSTRACT The transfer of Cryptosporidium oocysts from the surface water to the sediment beds of streams and rivers influences their migration in surface waters. We used controlled laboratory flume experiments to investigate the deposition of suspended Cryptosporidium parvum oocysts in streambeds. The experimental results demonstrate that hydrodynamic interactions between an overlying flow and a sediment bed cause oocysts to accumulate in the sediments and reduce their concentrations in the surface water. The association of C. parvum with other suspended sediments increased both the oocysts' ef

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Lau, Maximilian P., Michael Sander, Jörg Gelbrecht, and Michael Hupfer. "Spatiotemporal redox dynamics in a freshwater lake sediment under alternating oxygen availabilities: combined analyses of dissolved and particulate electron acceptors." Environmental Chemistry 13, no. 5 (2016): 826. http://dx.doi.org/10.1071/en15217.

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Environmental contextAt sediment surfaces, the availability of oxygen is controlled by its downward transport from the water surface and its consumption in microbial metabolism. Microorganisms can also consume substances other than oxygen to dispose of the surplus charge that is generated during microbial metabolism. We investigate the complex dynamics of these other substances when the oxygen availability fluctuates, and thereby contribute to the mechanistic understanding of oxygen-consuming processes in aquatic environments. AbstractBenthic mineralisation in lakes largely controls the availa

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Moisejenkova, Anastasija, Nikolaj Tarasiuk, and Aloyzas Girgždys. "PECULIARITIES OF THE THERMAL REGIME OF THE SURFACE SEDIMENTS IN LAKE TAPELIAI." Mokslas - Lietuvos ateitis 2, no. 5 (2010): 66–70. http://dx.doi.org/10.3846/mla.2010.093.

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The article discusses the process of heat transfer in the water sediment system having an impact on the input of nutrients and mineral substances from sediments to the bottom water layer. Therefore, conductivity sharply increases on the surface of bottom sediments and reaches more than 400 μS∙cm–1. The heat exchange process is analyzed in Lake Tapeliai classified as a “temporally warm” lake (see K. Kilkus). The paper defines heat transfer from bottom sediments to water applying the convection method and describes isotherm deepening of 4 ºC into sediments. The temperature of surface sediments i

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Hill, Liesl, and Sebastian Jooste. "The effects of contaminated sediments of the Blesbok Spruit near Witbank on water quality and the toxicity thereof to Daphnia pulex." Water Science and Technology 39, no. 10-11 (1999): 173–76. http://dx.doi.org/10.2166/wst.1999.0650.

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With the increasing focus on environmental issues, the objective of this study is to evaluate the potential impact of contaminated sediments of the Blesbok Spruit near Witbank - which receives acid mine drainage (AMD) inter alia - on biota. Direct transfer of chemicals from sediments to organisms is considered to be a major route of exposure for many species, and therefore focusing attention on sediment contamination and highlighting the fact that sediments are an important resource. Acute toxicity tests were performed on Daphnia pulex using both extracted sediment interstitial water and surfa

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Gemilang, Wisnu Arya, Ulung Jantama Wisha, and Guntur Adhi Rahmawan. "PARTICLE SIZE CHARACTERISTICS OF RIVERBED SEDIMENTS TRANSPORTED BY TIDAL BORE ‘BONO’ IN KAMPAR ESTUARY, RIAU-INDONESIA." Marine Research in Indonesia 43, no. 1 (2018): 25–35. http://dx.doi.org/10.14203/mri.v43i1.293.

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The presence of tidal bore in the Kampar River (locally known as ‘bono’) may influence sedimentation in the Kampar River and its estuary. Understanding sedimentation mechanisms (e.g., erosion, deposition) is important to communities along the Kampar River, which can be studied by analyzing characteristics of grain size distribution. Here, we study riverbed sediment samples collected from 17 stations using an Ekman grab sampler, accompanied by bathymetry and acoustic Doppler current profiler (ADCP) measurements. Grain size data show that the sediments are coarser upstream and gradually finer do

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Schrott, L., J. Götz, M. Geilhausen, and D. Morche. "Spatial and temporal variability of sediment transfer and storage in an Alpine basin (Reintal valley, Bavarian Alps, Gemany)." Geographica Helvetica 61, no. 3 (2006): 191–200. http://dx.doi.org/10.5194/gh-61-191-2006.

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Abstract. This paper focuses in particular on clastic sediment fluxes on talus slopes. Using orthophoto interpretation, field measurements and GIS-techniques, a quantification of areas and volumes of active sediment transfer related to specific landform units was achieved for different spatial scales. Closer investigation of a single landform complex, more specifically a talus sheet/ debris cone-complex, brought to light that remobilisation can overbalance sediment input by a factor of 57. This could be an indication of what may be expected in the whole catchment. At present. approximately 9%

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Zhou, Peng, Jiawang Chen, Dongrui Ruan, et al. "Design of a Marine Sediments Resistivity Measurement System Based on a Circular Permutation Electrode." Journal of Marine Science and Engineering 9, no. 9 (2021): 995. http://dx.doi.org/10.3390/jmse9090995.

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Marine sediments are rich in mineral resources, organic resources, and microbial life. The study of marine sediments is of great significance for the development and utilization of marine resources and understanding the life process. Resistivity is the overall characteristic of the electrical conductivity of marine sediments. Measuring the resistivity of marine sediments is helpful to ascertain the marine geological structure, study the distribution of marine mineral resources, and evaluate the marine soil environment. Measuring the resistivity of marine sediments is of great significance to p

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Vivant, Anne-Laure, Catherine Boutin, Stéphanie Prost-Boucle, Sandrine Papias, Christine Ziebal, and Anne-Marie Pourcher. "Fate of two strains of extended-spectrum beta-lactamase producing Escherichia coli in constructed wetland microcosm sediments: survival and change in antibiotic resistance profiles." Water Science and Technology 79, no. 8 (2019): 1550–60. http://dx.doi.org/10.2166/wst.2019.153.

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Abstract Free water surface constructed wetlands (FWS CW) are efficient technologies to limit the transfer of antibiotic resistant bacteria (ARB) originating from urban effluents into the aquatic environment. However, the decrease in ARB from inflow to outflow through the FWS CW may be explained by their transfer from the water body to the sediment. To investigate the behavior of ARB in the sediment of a FWS CW, we inoculated three microcosms with two strains of extended-spectrum beta-lactamase producing Escherichia coli (ESBL E. coli) belonging to two genotypes. Microcosms were composed of tw

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Shen, Huadong, Zhongbo Yu, Ge Yu, and Xiaoli Shi. "Grain Size and Pollen of Sediments in Wanghu Lake (Central China) Linked to Hydro-Environmental Changes." Water 12, no. 1 (2019): 45. http://dx.doi.org/10.3390/w12010045.

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Grain size of lake sediments is often measured in paleolimnological studies, especially investigations of past paleoclimatic and paleohydrologic changes. The implications of such measures, however, remain unclear, since watershed hydrology and the related transfer of materials to the lake are affected by local climate variables, hydrological shifts, and vegetation cover variables. Sediment from Wanghu Lake in the middle reaches of the Yangtze River have apparently been affected by land cover changes and lake-river system transitions caused by a sluice gate built at Fuchi in 1967. These changes

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Wakeham, S. G., and A. P. McNichol. "Transfer of lipids through marine water columns to sediments – insights from stable and radiocarbon isotopes." Biogeosciences Discussions 11, no. 6 (2014): 9761–812. http://dx.doi.org/10.5194/bgd-11-9761-2014.

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Abstract. Compound-specific 13C and 14C compositions of diverse lipid biomarkers (fatty acids, alkenones, hydrocarbons, sterols, and fatty alcohols) were measured in sinking particulate matter collected in sediment traps and from underlying surface sediments in the Black Sea, the Arabian Sea and the Ross Sea. The goal was to develop a multi-parameter approach to constrain relative inputs of organic carbon (OC) from marine biomass, terrigenous vascular plant, and relict sources. Marine biomass in sediment trap material from the Black Sea and Arabian Sea accounted for 66–100% of OC, with lower t

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Yang, Fan, Yankui Tang, Yuwei Mi, Lu Jiang, Penghong Luo, and Yang Yang. "Mn(II) Sorption on Stream Sediments Sampled in Manganese Mining Area: Dynamics and Mechanisms." Applied Sciences 12, no. 7 (2022): 3368. http://dx.doi.org/10.3390/app12073368.

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The stream sediments that have been impacted by manganese (Mn) containing wastewater for decades contain not only abundant microorganisms but also organic/inorganic substances. To achieve effective treatment of manganese (Mn)-containing effluent and recovery of Mn from water/sediments, the Mn(II) sorption behaviors and mechanism on sediments of a stream in Mn mining areas were studied. In addition, the study analyzed the effects of various factors (initial concentration, solution pH, sediment dose, contact time, and coexisting cations) on the Mn sorption efficiency of Daxin sediments, and expl

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Adel, Mnaf, and Ali N. Hilo. "The Effects of submerged vanes inclination angle on sediment transport into sub-channel." Wasit Journal of Engineering Sciences 11, no. 1 (2023): 105–15. http://dx.doi.org/10.31185/ejuow.vol11.iss1.414.

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The sub-channels that branch from the larger rivers may be manmade or natural. From the major channels, these sub-channels transfer sediments and water. The deposition of sediments at the entrance, sub-channel is a significant research challenge because it threatens the sub-facilities channel's and reduces the sub-carrying channel's capacity. Therefore, submerged vanes were used to reduce the amount of sediment entering the sub-channel. The goal of the vanes is to reduce the amount of sediment entering the sub-channel, hence redistributing sediment at the sub-entry channel's . They are vertica

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Zhang, Fei, Zhangdong Jin, A. Joshua West, et al. "Monsoonal control on a delayed response of sedimentation to the 2008 Wenchuan earthquake." Science Advances 5, no. 6 (2019): eaav7110. http://dx.doi.org/10.1126/sciadv.aav7110.

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Infrequent extreme events such as large earthquakes pose hazards and have lasting impacts on landscapes and biogeochemical cycles. Sediments provide valuable records of past events, but unambiguously identifying event deposits is challenging because of nonlinear sediment transport processes and poor age control. Here, we have been able to directly track the propagation of a tectonic signal into stratigraphy using reservoir sediments from before and after the 2008 Wenchuan earthquake. Cycles in magnetic susceptibility allow us to define a precise annual chronology and identify the timing and na

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Peixoto, Luciana, Pier Parpot, and Gilberto Martins. "Assessment of Electron Transfer Mechanisms during a Long-Term Sediment Microbial Fuel Cell Operation." Energies 12, no. 3 (2019): 481. http://dx.doi.org/10.3390/en12030481.

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The decentralized production of bioelectricity as well as the bioremediation of contaminated sediments might be achieved by the incorporation of an anode into anaerobic sediments and a cathode suspended in the water column. In this context, a sediment microbial fuel cell microcosm was carried out using different configurations of electrodes and types of materials (carbon and stainless steel). The results showed a long-term continuous production of electricity (>300 days), with a maximum voltage of approximately 100 mV reached after ~30 days of operation. A twofold increase of voltage was no

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VANDENPLAS, S., A. B. TEMSAMANI, Z. CISNEROS, and L. VAN BIESEN. "A FREQUENCY DOMAIN INVERSION METHOD APPLIED TO OBLIQUE REFLECTED SIGNALS FROM A WATER–SEDIMENT INTERFACE." Journal of Computational Acoustics 09, no. 02 (2001): 553–63. http://dx.doi.org/10.1142/s0218396x01000747.

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Due to the complexity of the seafloor as an acoustical system, it is very important to validate wave propagation models and test inversion methods first in the laboratory. A known sediment is placed in a water-filled tank, in such a way that a smooth water–sediment interface is obtained with minimal air bubbles retained in the sediment. Two broadband piston transducers are used to carry out reflection experiments at oblique incidence. The placement of the emitter and receiver is symmetrical with respect to a vertical plane perpendicular to the sediment surface. The aim of this work is to find

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Glazunova, Irina V., Sergey N. Rednikov, and Khanh Zu Nguyen. "Experimental determination of the characteristics of sediment transfer and sedimentation under uniform movement in the channel bed, taking into account the influence of natural and artificial crossbars." Prirodoobustrojstvo, no. 4 (2023): 92–97. http://dx.doi.org/10.26897/1997-6011-2023-4-92-97.

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The issue of the research – investigation of the hydrodynamics of river sediments’ artificial structures in the interfluve of the Lo and the Kau rivers (The Northern Vietnam) as a tool for the formation of hydrodynamic and geochemical anomalies in water bodies. Laboratory studies of the speeds of movement and sedimentation of suspended sediments were carried out according to the planning of the experiment for a series of using natural and artificial crossbars in modeling the processes of transport and sedimentation of sediments. Based on a laboratory model experiment, the parameters of crossba

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Wang, Jianlong, Jinsheng Sun, Hang Bian, et al. "Kinetic Hydrate Inhibition of Natural Gels in Complex Sediment Environments." Gels 8, no. 12 (2022): 758. http://dx.doi.org/10.3390/gels8120758.

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Natural gels are emerging as a hotspot of global research for their greenness, environmental-friendliness, and good hydrate inhibition performance. However, previous studies mostly performed experiments for simple pure water systems and the inhibition mechanism in the sediment environment remains unclear. Given this, the inhibition performance of xanthan gum and pectin on hydrate nucleation and growth in sediment environments was evaluated via hydrate formation inhibition tests, and the inhibition internal mechanisms were revealed via a comprehensive analysis integrating various methods. Furth

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Sulistiowati, Sulistiowati, Neviaty Putri Zamani, Dietriech Geofrfey Bengen, Cheng Ling Lim, and Muhammad Reza Cordova. "Characteristic of Microplastic on Coral Reef Sediment and Sea Urchin (Diadema sp.) in Tidung Island, Jakarta Bay, Indonesia." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 28, no. 4 (2023): 289–300. http://dx.doi.org/10.14710/ik.ijms.28.4.289-300.

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Microplastics are recognized as common contaminants of coral ecosystem in Tidung Island, affecting both sediment and sea urchins residing in this environment. Therefore, this study aimed to determine the characteristics of microplastics found in sediment, the mouth, and the digestive system of sea urchins (Diadema sp.), assessing the relationship between coral cover percentage and microplastic type and size, and the transfer of microplastics from sediment to sea urchins. Sampling was conducted twice, namely in October 2021 and October 2022. Microplastics in sediments were extracted using ZnCl2

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Kramer Stajnko, Janja, Renata Jecl, and Matjaž Nekrep Perc. "Advances in Monitoring and Understanding the Dynamics of Suspended-Sediment Transport in the River Drava, Slovenia: An Analysis More than a Decade-Long." Applied Sciences 13, no. 15 (2023): 9036. http://dx.doi.org/10.3390/app13159036.

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Managing sediment transport in streams is crucial to the surface water resource development strategy and has several implications for flood risk and water management, hydropower use, and balancing river morphology. This paper summarises the movement and behaviour of suspended sediment within the Slovenian portion of the River Drava, covering a span of thirteen years from 2005 to 2018. An analysis of relevant data collected during this period is also presented. Suspended-sediment dynamics strongly depend on flow velocity, seasonal variations in sediment sources, and human interventions in the r

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Qureshi, Mohsin Usman, Maryam Alsaidi, Mubashir Aziz, Ilhan Chang, Ali Murtaza Rasool, and Zaheer Abbas Kazmi. "Use of Reservoir Sediments to Improve Engineering Properties of Dune Sand in Oman." Applied Sciences 11, no. 4 (2021): 1620. http://dx.doi.org/10.3390/app11041620.

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Managing sediments dredged from reservoirs of recharge dams is an environmental issue, however, these sediments can be an abundant and economical source of fine-grained fill soil. This experimental investigation quantifies the geotechnical properties of a reservoir sediment used to improve engineering properties of a poorly graded dune sand in Oman. The binary mixes were prepared with different percentages (5, 10, 20, 50, 75, 90, 95%) of sediment with sand. Laboratory tests such as gradation, consistency limits, compaction, and unconfined compression tests were performed to measure the enginee

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Queiroz, Lucas Gonçalves, Luana de Oliveira Hallai, Beatriz Rocha de Moraes, Rômulo Augusto Ando, Marcelo Pompêo, and Bárbara Rani-Borges. "A straightforward protocol for extracting microplastics from freshwater sediment with high organic content." Knowledge & Management of Aquatic Ecosystems, no. 426 (2025): 6. https://doi.org/10.1051/kmae/2025001.

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Extracting microplastics from sediment is critical in assessing pollution in freshwater environments. However, this process can be particularly challenging for clayey sediments with a significant organic matter content. This study proposes a simplified method for extracting microplastics from organic-rich clayey sediments and a complete protocol for sediment processing. To evaluate the extraction method, calcined clayey sediment was artificially enriched with varying organic content (20, 40, and 60%). Known quantities of plastic particles with distinct characteristics and compositions (PET, HD

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Jackson, Leland J., David J. Rowan, R. Jack Cornett, and Jacob Kalff. "Myriophyllum spicatum Pumps Essential and Nonessential Trace Elements from Sediments to Epiphytes." Canadian Journal of Fisheries and Aquatic Sciences 51, no. 8 (1994): 1769–73. http://dx.doi.org/10.1139/f94-178.

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To test the hypothesis that elements can be transferred from freshwater sediments to macrophytes and to epiphytes, we grew Myriophyllum spicatum in natural sediments containing 60Co and 54Mn (essential) and 137Cs, 152Eu, 154Eu, and 155Eu (nonessential). We found no differences between shoot or epiphyte to sediment bioaccumulation factors (BAFs) and only found differences between root and shoot to sediment BAFs for 60Co and 54Mn, probably because these elements adsorb onto root surfaces. We found no differences in BAFs for any elements between shoots and epiphytes, suggesting no differences in

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Kim, Min-Cheol, and Yong Sik Gihm. "Fluidal Peperites Recorded in the Cretaceous Lacustrine Sediments in the Southern Korean Peninsula: Syn-Magmatic Sediment Fluidization and Its Influence on the Peperite Formation." Minerals 14, no. 9 (2024): 951. http://dx.doi.org/10.3390/min14090951.

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This study assessed the influence of sediment and water redistribution in host sediments on peperite formation by examining the peperites at the boundary between Cretaceous lacustrine sedimentary successions and intruding dikes (D1 and D2). The peperite zones occur along the dike margins and consist of fluidal juvenile fragments, classified as Type A and Type B perperite zones based on lateral extent of the peperite zones. Type A peperite zone, the dominant type, exhibites a narrow distribution (<20 cm), whereas Type B peperite zone sporadically occurs along D1 with a wider width (<1 m).

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Sandaa, Ruth-Anne, Vigdis Lid Torsvik, and Jostein Goksøyr. "Transferable drug resistance in bacteria from fish-farm sediments." Canadian Journal of Microbiology 38, no. 10 (1992): 1061–65. http://dx.doi.org/10.1139/m92-174.

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Antibiotic-resistant bacteria were isolated from sediment samples collected beneath two fish farms west of Bergen (Norway). The samples were collected just after the fish had been treated with oxytetracycline. Eighty-four bacterial isolates were tested for susceptibility to antibacterial agents. Most of the isolates were resistant to oxytetracycline, kanamycin, and sulfamethoxazole. Transferable plasmid-related resistance was shown by direct cell transfer and agarose gel electrophoresis. Among 34 multiple-resistant isolates, 7 isolates were able to transfer resistance to Escherichia coli HB101

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Tasselli, Stefano, Laura Marziali, Claudio Roscioli, and Licia Guzzella. "Legacy Dichlorodiphenyltrichloroethane (DDT) Pollution in a River Ecosystem: Sediment Contamination and Bioaccumulation in Benthic Invertebrates." Sustainability 15, no. 8 (2023): 6493. http://dx.doi.org/10.3390/su15086493.

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Dichlorodiphenyltrichloroethane (DDT) contamination in the Toce River in northern Italy was studied by collecting data from 2016 to 2021 upstream and downstream of a production factory which in the past had discharged technical DDT. Analysis of sediments and of bioaccumulation in different benthic invertebrate taxa (Gammaridae, Diptera, Ephemeroptera Baetidae and Heptageniidae) was carried out to assess the transfer of DDT from sediments to benthic invertebrates and the environmental risk of this legacy pollutant for the river ecosystem. DDT and its metabolites dichlorodiphenyldichloroethylene

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Tang, Q., Y. Bao, X. He, and A. Wen. "Heavy metal enrichment in the riparian sediments and soils of the Three Gorges Reservoir, China." Proceedings of the International Association of Hydrological Sciences 367 (March 3, 2015): 244–50. http://dx.doi.org/10.5194/piahs-367-244-2015.

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Abstract. The Three Gorges Reservoir encompasses a riparian zone with a vertical height of 30 m and a total area of 349 km2 that has been subjected to alternate inundation and exposure due to regular impoundment. Sedimentation on the riparian landforms constitutes an important pathway for riverine contaminant redistribution. In an attempt to understand heavy metal enrichment since water inundation, riparian sediments and soils were sampled along five transects in a typical riparian zone composed of cultivated bench terraces in the middle reaches. Heavy metals (Cr, Ni, Cu, Zn, As, Cd and Pb) we

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Seidel, H., J. Ondruschka, P. Morgenstern, and U. Stottmeister. "Bioleaching of heavy metals from contaminated aquatic sediments using indigenous sulfur-oxidizing bacteria: a feasibility study." Water Science and Technology 37, no. 6-7 (1998): 387–94. http://dx.doi.org/10.2166/wst.1998.0776.

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The removal of heavy metals from contaminated river sediments was studied using suspension leaching under laboratory conditions and percolation leaching in a pilot plant. The leaching potential of indigenous sulfur-oxidizing bacteria was compared with acid treatment. Bioleaching with elemental sulfur as substrate was found to be better than treatment with sulfuric acid for the solubilization of all metals tested. The physical and chemical properties of the sediments used in this study did not affect leaching capacity under optimum conditions in the laboratory. Under the practical conditions in

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Wang, Yang, Yufei Wang, Xiaoming Wan, et al. "Influence of the Hanjiang River’s Inlet Sediment Decrease on Modern Sedimentation in the Underwater Delta." Applied Sciences 13, no. 14 (2023): 8039. http://dx.doi.org/10.3390/app13148039.

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The Hanjiang River is the second-largest river in Guangdong Province, China. The modern sedimentation pattern of the Hanjiang subaqueous delta has been significantly affected by changes in the sediment delivered by the Hanjiang River. Based on multiperiod charts and columnar samples from the Hanjiang subaqueous delta, the influence of a sharp decrease in the sediment flux from the Hanjiang River on the deposition of the Hanjiang subaqueous delta in the past 60 years was studied through a combination of chart-based analysis of the evolution of erosion and deposition and the analysis of sediment

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Kouhpeima, A., S. Feiznia, and H. Ahmadi. "Tracing fine sediment sources in small mountain catchment." Water Science and Technology 63, no. 10 (2011): 2324–30. http://dx.doi.org/10.2166/wst.2011.509.

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Fine sediment represents an important diffuse source pollutant in surface waters, due to its role in governing the transfer and fate of many substances, including nutrients, heavy metals, pesticides and other organic contaminants, and its influence on aquatic ecology. Therefore, catchment management strategies frequently need to include provision for the control of sediment mobilization and delivery. The sediment tracing concept provides a valuable framework for assisting the management and control of diffuse source sediment pollution by identifying the key sources and demonstrating the import

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Ivanov, Maksim M., Nadezhda Ivanova, and Valentin Golosov. "Sediment and Particulate 137Cs Budget Studies in Upa River Basin: History, Results, and Prospects." Land 12, no. 1 (2023): 175. http://dx.doi.org/10.3390/land12010175.

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The intensive pollution of vast areas after the Chernobyl accident, especially in the territories of Ukraine, Russia, and Belarus, has not only become a serious environmental issue, but also presents wide methodological opportunities for studying the functioning of natural systems. The proposed work is a generalization of the results of studies on the migration of 137Cs in the runoff of river sediments, which were carried out in the basin of the Upa River for over 30 years after the accident. This basin is one of the most radioactively contaminated and studied in Central Russia. Over the past

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Koppes, Michèle, Richard Sylwester, Andres Rivera, and Bernard Hallet. "Variations in Sediment yield Over the Advance and Retreat of a Calving Glacier, Laguna San Rafael, North Patagonian Icefield." Quaternary Research 73, no. 1 (2010): 84–95. http://dx.doi.org/10.1016/j.yqres.2009.07.006.

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Bathymetric and sub-bottom acoustic data were collected in Laguna San Rafael, Chile, to determine sediment yields during the Little Ice Age advance and subsequent retreat of San Rafael Glacier. The sediment volumes and subaqueous landforms imaged are used to interpret the proglacial dynamics and estimate erosion rates from a temperate tidewater glacier over a complete advance–retreat cycle. Sediment yields from San Rafael Glacier averaged 2.7 Ã— 10Â m/a since the end of the Little Ice Age, circa AD 1898, corresponding to average basin-wide erosion rates of 23 Â± 9Â mm/a; the highest erosion ra

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Zhou, Peng, Chunyue Zhang, Jingkun Ai, et al. "The Numerical Simulation and Experimental Study of Heat Flow in Seabed Sediments Based on COMSOL." Journal of Marine Science and Engineering 10, no. 10 (2022): 1356. http://dx.doi.org/10.3390/jmse10101356.

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In situ electrothermal conduction heating technology refers to the setting up of a heat source directly within the sediments, using the heat conductivity of the sediments and the heat radiation of the heat source for heat transfer to achieve the in situ heating of the sediments. The in situ electrothermal conduction heating of sediments has the disadvantage of the heating equipment being easily damaged and difficult to operate, and requires the equipment to be able to withstand seawater pressure and marine corrosion. In this paper, based on the combination of numerical simulations (using COMSO

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Ward, Melissa A., Tessa M. Hill, Chelsey Souza, et al. "Blue carbon stocks and exchanges along the California coast." Biogeosciences 18, no. 16 (2021): 4717–32. http://dx.doi.org/10.5194/bg-18-4717-2021.

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Abstract. Salt marshes and seagrass meadows can sequester and store high quantities of organic carbon (OC) in their sediments relative to other marine and terrestrial habitats. Assessing carbon stocks, carbon sources, and the transfer of carbon between habitats within coastal seascapes are each integral in identifying the role of blue carbon habitats in coastal carbon cycling. Here, we quantified carbon stocks, sources, and exchanges in seagrass meadows, salt marshes, and unvegetated sediments in six bays along the California coast. In the top 20 cm of sediment, the salt marshes contained appr

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Gray, Derek K., and Hugh J. MacIsaac. "Diapausing zooplankton eggs remain viable despite exposure to open-ocean ballast water exchange: evidence from in situ exposure experiments." Canadian Journal of Fisheries and Aquatic Sciences 67, no. 2 (2010): 417–26. http://dx.doi.org/10.1139/f09-192.

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To reduce the transfer of nonindigenous species, regulations require transoceanic ships to exchange ballast with ocean water before discharging into the Great Lakes. Although ballast water exchange (BWE) is effective for live freshwater animals, laboratory experiments provide mixed results with regards to its impact on diapausing zooplankton eggs. We conducted an in situ test of the effectiveness of BWE for treating diapausing eggs in ballast sediments. Incubation chambers containing ballast sediment were placed in ballast tanks of cargo vessels transiting from North America to Europe. Each ve

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Bentley, Samuel J., and Elisabeth Kahlmeyer. "Patterns and mechanisms of fluvial sediment flux and accumulation in two subarctic fjords: Nachvak and Saglek Fjords, Nunatsiavut, Canada." Canadian Journal of Earth Sciences 49, no. 10 (2012): 1200–1215. http://dx.doi.org/10.1139/e2012-052.

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Recent marine sedimentary deposits and river discharge in two subarctic fjords in Nunatsiavut (Northern Labrador, Canada) have been studied to elucidate patterns and mechanisms of fluvial sediment transfer and accumulation in the fjords, to further our understanding of the longer-term sedimentary record. Multibeam and sub-bottom acoustic data and sediment cores were collected in Nachvak and Saglek fjords, within Canada’s Torngat Mountains National Park, as part of the most extensive study of the park’s marine resources to date. Cores were subsampled for X-radiography, grain size, and 210Pb/137

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Michaelovitch de Mahiques, Michel, Roberto Violante, Paula Franco-Fraguas, et al. "Control of oceanic circulation on sediment distribution in the southwestern Atlantic margin (23 to 55° S)." Ocean Science 17, no. 5 (2021): 1213–29. http://dx.doi.org/10.5194/os-17-1213-2021.

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Abstract. In this study, we interpret the role played by ocean circulation in sediment distribution on the southwestern Atlantic margin using radiogenic Nd and Pb isotopes. The latitudinal trends for Pb and Nd isotopes reflect the different current systems acting on the margin. The utilization of the sediment fingerprinting method allowed us to associate the isotopic signatures with the main oceanographic features in the area. We recognized differences between Nd and Pb sources to the Argentinean shelf (carried by the flow of Subantarctic Shelf Water) and slopes (transported by deeper flows).

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Hahn, Jens, Thanh Bui, Mathias Kessler, et al. "Catchment Soil Properties Affect Metal(loid) Enrichment in Reservoir Sediments of German Low Mountain Regions." Applied Sciences 12, no. 5 (2022): 2277. http://dx.doi.org/10.3390/app12052277.

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Sediment management is a fundamental part of reservoir operation, but it is often complicated by metal(loid) enrichment in sediments. Knowledge concerning the sources of potential contaminants is therefore of important significance. To address this issue, the concentrations and the mobile fractions of metal(loid)s were determined in the sediments and the respective catchment areas of six reservoirs. The results indicate that reservoirs generally have a high potential for contaminated sediment accumulation due to preferential deposition of fine particles. The median values of the element-specif

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Khalilivavdareh, Sohrab, Ali Shahnazari, and Amirpouya Sarraf. "Spatio-Temporal Variations of Discharge and Sediment in Rivers Flowing into the Anzali Lagoon." Sustainability 14, no. 1 (2022): 507. http://dx.doi.org/10.3390/su14010507.

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In the last few years, trend identification has become an important issue in hydrological time-series analyses; it is also a difficult task, due to the variety of models and the impact of climate change on the river flow regime. Due to the vital importance of the Anzali Lagoon to the environment of the region, and the threat to its health caused by the volume or amount of inlet sediments, we decided to study the changes in flow and sediment in the rivers flowing into the Anzali Lagoon. For the present study, the long-term monthly, seasonal, and annual sediment and discharge data of seven stati

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Wakeham, S. G., and A. P. McNichol. "Transfer of organic carbon through marine water columns to sediments – insights from stable and radiocarbon isotopes of lipid biomarkers." Biogeosciences 11, no. 23 (2014): 6895–914. http://dx.doi.org/10.5194/bg-11-6895-2014.

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Abstract. Compound-specific 13C and 14C compositions of diverse lipid biomarkers (fatty acids, alkenones, hydrocarbons, sterols and fatty alcohols) were measured in sinking particulate matter collected in sediment traps and from underlying surface sediments in the Black Sea, the Arabian Sea and the Ross Sea. The goal was to develop a multiparameter approach to constrain relative inputs of organic carbon (OC) from marine biomass, terrigenous vascular-plant and relict-kerogen sources. Using an isotope mass balance, we calculate that marine biomass in sediment trap material from the Black Sea and

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Kummert, Mario, and Reynald Delaloye. "Regional-scale inventory of periglacial moving landforms connected to the torrential network system." Geographica Helvetica 73, no. 4 (2018): 357–71. http://dx.doi.org/10.5194/gh-73-357-2018.

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Abstract. When connected to torrential channels, periglacial moving landforms (including rock glaciers, push moraines and high-altitude landsliding masses) may constitute important active sediment sources for gravitational and torrential transfer processes such as debris flows. However, still very little is known about the location and the number of such types of sedimentary connection in given regions, as well as about the typical sediment transfer rates that can be expected. Therefore, this contribution aims at (i) describing a new methodology developed to identify and characterize moving la

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De La Fuente, Maria, Jean Vaunat, and Héctor Marín-Moreno. "Modelling Methane Hydrate Saturation in Pores: Capillary Inhibition Effects." Energies 14, no. 18 (2021): 5627. http://dx.doi.org/10.3390/en14185627.

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Experimental and field observations evidence the effects of capillarity in narrow pores on inhibiting the thermodynamic stability of gas hydrates and controlling their saturation. Thus, precise estimates of the gas hydrate global inventory require models that accurately describe gas hydrate stability in sediments. Here, an equilibrium model for hydrate formation in sediments that accounts for capillary inhibition effects is developed and validated against experimental data. Analogous to water freezing in pores, the model assumes that hydrate formation is controlled by the sediment pore size di

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Darricau, Louise, Abdellatif Elghali, Patrick Martel, and Mostafa Benzaazoua. "Evaluation of the Anthropogenic Metal Pollution at Osisko Lake: Sediments Characterization for Reclamation Purposes." Applied Sciences 11, no. 5 (2021): 2298. http://dx.doi.org/10.3390/app11052298.

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The anthropogenic pollution of lake ecosystems by human activities (e.g., mining industries) is recognized as a serious issue. The Osisko urban lake located in Rouyn-Noranda (Quebec, Canada) was used partially as a waste disposal facility for many decades, causing a heavy pollution. The main undertakings of this study are (i) assessing the mineralogical and geochemical properties of lake Osisko sediments, and (ii) studying the pollution that occurred within lake water due to the sediments’ reactivity. Water and sediments across the lake were collected in different sensitive locations. Within t

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