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Journal articles on the topic 'Sedimentation and deposition – Measurement'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 January 2023

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1

von der Weiden, S. L., F. Drewnick, and S. Borrmann. "Particle Loss Calculator – a new software tool for the assessment of the performance of aerosol inlet systems." Atmospheric Measurement Techniques Discussions 2, no. 2 (2009): 1099–141. http://dx.doi.org/10.5194/amtd-2-1099-2009.

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Abstract. Most aerosol measurements require an inlet system to transport aerosols from a select sampling location to a suitable measurement device through some length of tubing. Such inlet systems must be optimized to minimize aerosol sampling artifacts and maximize sampling efficiency. In this study we introduce a new multifunctional software tool (Particle Loss Calculator, PLC) that can be used to quickly determine aerosol sampling efficiency and particle transport losses due to passage through arbitrary tubing systems. The software employs relevant empirical and theoretical relationships fo

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von der Weiden, S. L., F. Drewnick, and S. Borrmann. "Particle Loss Calculator – a new software tool for the assessment of the performance of aerosol inlet systems." Atmospheric Measurement Techniques 2, no. 2 (2009): 479–94. http://dx.doi.org/10.5194/amt-2-479-2009.

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Abstract. Most aerosol measurements require an inlet system to transport aerosols from a select sampling location to a suitable measurement device through some length of tubing. Such inlet systems must be optimized to minimize aerosol sampling artifacts and maximize sampling efficiency. In this study we introduce a new multifunctional software tool (Particle Loss Calculator, PLC) that can be used to quickly determine aerosol sampling efficiency and particle transport losses due to passage through arbitrary tubing systems. The software employs relevant empirical and theoretical relationships fo

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Tosic, Radislav, Dragana Todorovic, Slavoljub Dragicevic, Istvan Bikit, Sofija Forkapic, and Branislav Blagojevic. "Radioactivity and measurements of sediment deposition rate of the Drenova reservoir (B&H)." Nuclear Technology and Radiation Protection 27, no. 1 (2012): 52–56. http://dx.doi.org/10.2298/ntrp1201052t.

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This work presents the first estimate of the radioactivity and sediment deposition rate of the Drenova reservoir. The radioactivity and sedimentation rate were computed applying the 210Pb and 137Cs methods. Samples of 210Pb and 137Cs were taken from four boreholes drilled in the Drenova reservoir in June 2010. Vertical distribution of the natural and artificial radionuclides in four boreholes was examined using a gamma spectrometry measurement with HpGe detectors, Gamma X type (10 keV-3 MeV). Activities ranging from 122-8 Bq/kg were found for 210Pb, and from 140-0.8 Bq/kg for 137Cs. The sedime

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Manh, N. V., B. Merz, and H. Apel. "Sedimentation monitoring including uncertainty analysis in complex floodplains: a case study in the Mekong Delta." Hydrology and Earth System Sciences 17, no. 8 (2013): 3039–57. http://dx.doi.org/10.5194/hess-17-3039-2013.

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Abstract. Quantity and quality of sediment deposition in complex floodplains are affected by many processes that are typically highly spatially and temporally variable and hard to quantify exactly. The main processes in this context are suspended sediment transport dynamics in rivers, floodplain channel interactions, and internal floodplain processes. In consequence, any point measurement of sedimentation in floodplains contains a high degree of uncertainty, both stemming from measurement errors and from the lack of representativeness for a larger area. However, up to now, uncertainty analyses

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Smith, D., L. Cross, J. Rivet, and S. Hall. "Design of a semi-autonomous boat for measurements of coastal sedimentation and erosion." Proceedings of the International Association of Hydrological Sciences 367 (March 3, 2015): 447–54. http://dx.doi.org/10.5194/piahs-367-447-2015.

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Abstract. Measurement of sediment deposition and erosion in coastal areas is a challenge due to soft shifting sediments, but is critical to assessing loss or restoration of coastal sediments and wetlands. The aim of this project was to design and construct a semi-autonomous boat with water depth measuring capabilities. It was intended to map the depth of coastal wetlands to determine erosion rates and assess coastal restoration effects. Depth-measuring equipment was incorporated into an autonomous pontoon boat powered by solar panels. The propulsion system consisted of two paddlewheels and two

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Göğüş, Mustafa, A. Cüneyt Gerek, and A. Burcu Altan-Sakarya. "Application of a flow-measurement structure for sediment-laden streams." Canadian Journal of Civil Engineering 36, no. 9 (2009): 1539–43. http://dx.doi.org/10.1139/l09-079.

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Generally, measurement of flow in natural streams is accomplished by measuring the flow depth. Hence, the relationship between the water level and discharge should be obtained in advance. However, in streams with high sediment load, the bottom level may change due to sediment deposition, preventing the single relation between water level and discharge. This paper summarizes the application of a flow-measurement structure for sediment-laden streams. The proposed structure is designed and built in Turkey and has been under operation since 1998 without any sedimentation problem. The agreement bet

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W. Ameen, Yousif. "Hydrologic Modeling for Sedimentation in Hemrin Reservoir Using HEC-HMS." DJES 11, no. 4 (2018): 67–72. http://dx.doi.org/10.24237/djes.2018.11410.

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Hemrin dam is an important dam in Iraq located on Diyala river which is considered as main tributary of Tigris. The sedimentation is very difficult problem and is considered the major problem affecting the utilization of the dam. HEC-HMS 4.1 software was used to made a simulation for sedimentation in Hemrin reservoir in order to estimate the amount of sediment entering and deposition in the reservoir for the period (1981-2014). The calibration processes were performed using field measurement data for flow of water from Diyala river, the result obtained from simulation process found that the av

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Oktaviani, Whindy, Ariyanti Sarwono, and I. Wayan Suryawan. "Identification of Surface Water Treatment Plan (WTP) Effluent and Distribution Water Quality in Wonogiri Regency, Central Java." Civil and Environmental Science 005, no. 01 (2022): 001–7. http://dx.doi.org/10.21776/ub.civense.2022.00501.1.

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This study analyzed the water treatment system into drinking water, and the quality of raw water and distribution results at Perumda Air Minum Giri Tirta Sari, Wonogiri Regency. The water treatment plant's (WTP) for surface water consists of intake, pre-sedimentation, coagulation, flocculation, sedimentation, filtration, reservoir storage, and distribution. The sludge resulting from the deposition process is still not managed. Further planning is needed to control environmental pollution that may occur due to dumping sludge into streams. The quality of river raw water that has not met the qual

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Hoque, Ashabul, Dipankar Kumar, Anip Kumar Paul, Masudar Rahman, Gour Chandra Paul, and Shin Ichi Aoki. "Sedimentation in Dune Forests, Mangrove Forests and CC Block System and Associated Topographic Changes." Journal of Bangladesh Academy of Sciences 43, no. 1 (2019): 67–78. http://dx.doi.org/10.3329/jbas.v43i1.42235.

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This paper is concerned with the deposition of sediment due to dune forests (Nakatajima dune, Japan) and CC block system on a riverbank (Padma, Bangladesh). Measurements of sediment deposition were carried out at Nakatajima dune, Japan and at Padma riverbank, Rajshahi, Bangladesh using Global Positioning System (GPS). 2442 m3 sediment migrates each year to the East side of Nakatajima dune by wind and the edge of the dune develops about 6-7 m/year due to the existence of forests. Sedimentation rate is also greater in shallower mangrove areas. The trapped sediment height varies from 8.0 to 10.0

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Manh, N. V., B. Merz, and H. Apel. "Sedimentation monitoring including uncertainty analysis in complex floodplains: a case study in the Mekong Delta." Hydrology and Earth System Sciences Discussions 10, no. 1 (2013): 325–73. http://dx.doi.org/10.5194/hessd-10-325-2013.

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Abstract. Quantity and quality of sediment deposition in complex floodplains are affected by many uncertain factors, ranging from suspended sediment transport dynamics in rivers and floodplain channel interactions to internal floodplain processes. In consequence, any point measurement of sedimentation in floodplains contains a high degree of uncertainty calling for a careful analysis of the measured data. However, uncertainty analyses are not documented in publications on floodplain sedimentation data. Therefore the presented work illustrates a field sampling strategy aiming at the quantificat

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Paola, Chris, Vamsi Ganti, David Mohrig, Anthony C. Runkel, and Kyle M. Straub. "Time Not Our Time: Physical Controls on the Preservation and Measurement of Geologic Time." Annual Review of Earth and Planetary Sciences 46, no. 1 (2018): 409–38. http://dx.doi.org/10.1146/annurev-earth-082517-010129.

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Sadler's (1981) analysis of how measured sedimentation rate decreases with timescale of measurement quantified the vanishingly small fractional time preservation—completeness—of the stratigraphic record. Generalized numerical models have shown that the Sadler effect can be recovered, through the action of erosional clipping and time removal (the “stratigraphic filter”), from even fairly simple topographic sequences. However, several lines of evidence suggest that most of the missing time has not been eroded out but rather represents periods of inactivity or stasis. Low temporal completeness co

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Zhang, Yunlong, Zhidong Bao, Luxing Dou, Li Jiang, Mingyang Wei, and Li Zhang. "Hydrodynamics and deposition in lacustrine shallow-water delta front: A combination of numerical simulations and modern sedimentation measurements." Interpretation 8, no. 3 (2020): SM39—SM52. http://dx.doi.org/10.1190/int-2019-0176.1.

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With the exploration of tight oil and gas, shallow-water deltaic reservoirs have been attracting more and more attention. The sedimentary architecture of a shallow-water delta shows distinctive differences with that of a deep-slope delta. These differences may be associated with the mechanism and characteristics of the deposition in the area where the sediments unloaded. Based on modern sedimentary research of the Poyang Lake in China, this paper focuses on the processes of river flow entering a lake with a low dip angle. We conducted six sets of numerical simulations with different initial se

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Wildhack, S., and Fritz Aldinger. "Electrophoretic Deposition of Nanocrystalline SiC Ceramics." Key Engineering Materials 314 (July 2006): 33–38. http://dx.doi.org/10.4028/www.scientific.net/kem.314.33.

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In the present contribution, the electrophoretic deposition (EPD) of nanocrystalline SiC powders will be discussed. In order to avoid the electrolysis of water during deposition as well as oxygen uptake of the nanocrystalline SiC by hydrolysis reactions, nonaqueous solvents were tested including ethanol and diethyl formamide. The solvents were compared regarding their effect on particle size distributions and sedimentation tests. Auxiliary information on the surface conditions as a function of the acidity of the suspension was drawn from aqueous zeta-potential measurements. The influence of di

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Pisarska-Jamroży, Małgorzata, Katarzyna Machowiak, and Dariusz Krzyszkowski. "Sedimentation style of a Pleistocene kame terrace from the Western Sudety Mountains, S Poland." Geologos 16, no. 2 (2010): 101–10. http://dx.doi.org/10.2478/v10118-009-0008-8.

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Sedimentation style of a Pleistocene kame terrace from the Western Sudety Mountains, S PolandThe depositional conditions of kame terraces in a mountain valley were analysed sedimentologically and petrologically through a series of kame terraces in the Rudawy Janowickie mountains. The kame terraces comprise five lithofacies associations. Lithofacies association GRt, Sp originates from deposition in the high-energy, deep gravel-bed channel of a braided river. Lithofacies association GC represents a washed out glacial till. Probably a thin layer of till was washed out by sandy braided rivers (Sp)

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Currle, Ulrike. "Determination of the Stability of Low Viscous Particle Inks." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (2012): 000035–46. http://dx.doi.org/10.4071/cicmt-2012-ta21.

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Inkjet printing is a flexible contactless deposition method for a variety of materials and applications in microelectronics. For a reliable printing process the stability of the ink is essential and verification of the stability of a suspension remains a demanding task. After presenting some fundamentals of ink preparation, several methods of determining the stability of inks considering different particles are discussed. In a stable suspension no sedimentation occurs i.e. the solid content remains constant over a long period. The simplest way of evaluating the stability is supposed to be visu

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Ehrbar, Daniel, Lukas Schmocker, Michael Doering, et al. "Continuous Seasonal and Large-Scale Periglacial Reservoir Sedimentation." Sustainability 10, no. 9 (2018): 3265. http://dx.doi.org/10.3390/su10093265.

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Sustainable reservoir use is globally threatened by sedimentation. It has been generally recognized that inadequate consideration of reservoir sedimentation has caused the worldwide decline of net storage. Numerical models are useful tools to simulate sedimentation processes and can be used to derive efficient counter-measures and sediment management strategies. They can be applied to both existing and potential future reservoirs to predict long-term sedimentation. In this study, an application of a simple, robust, and stable numerical 1D model to Gebidem reservoir in Switzerland accompanied b

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Lovell, CJ, and CW Rose. "Measurement of soil aggregate settling velocities. 1. A modified bottom withdrawal tube method." Soil Research 26, no. 1 (1988): 55. http://dx.doi.org/10.1071/sr9880055.

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Sediment eroded by water consists largely of soil aggregates. The settling velocity of such aggregates and primary soil particles is of fundamental importance to the processes of sediment transport and deposition in water. A modified bottom withdrawal tube method is presented for the direct measurement of the settling velocity distribution of soil aggregates or particles of different sizes that settle together in a polydisperse suspension. The modified method overcomes experimental error and analytical deficiencies present in the initial method and is suitable for measuring settling velocities

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Begy, Robert-Csaba, Codrin F. Savin, Szabolcs Kelemen, et al. "Investigation of the effect of anthropogenic land use on the Pănăzii Lake (Romania) catchment area using Cs-137 and Pb-210 radionuclides." PLOS ONE 16, no. 6 (2021): e0251603. http://dx.doi.org/10.1371/journal.pone.0251603.

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The problem of soil degradation has accentuated over recent decades. Aspects related to soil erosion and its relation to changes in land use as well as anthropogenic influence constitute a topic of great interest. The current study is focused on a soil erosion assessment in relation to land use activities in the Pănăzii Lake catchment area. Fallout radionuclides were used to provide information on soil erosion as well as redistribution rates and patterns. Variations in the sedimentation rate of the lake were also investigated as these reflect periods in which massive erosion events occurred in

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Missiaen, L., L. Wacker, B. C. Lougheed, et al. "Radiocarbon Dating of Small-sized Foraminifer Samples: Insights into Marine sediment Mixing." Radiocarbon 62, no. 2 (2020): 313–33. http://dx.doi.org/10.1017/rdc.2020.13.

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ABSTRACTRadiocarbon (14C) can be used to build absolute chronologies and reconstruct ocean ventilation over the last 40 ka. Sample size requirements have restricted 14C measurements in marine cores with low foraminifer content, impeding 14C-based studies focused on abrupt climate events. Recent developments have demonstrated that small-sized foraminifer samples can now be dated using a gas introduction system at the cost of a small decrease in precision. We explore the potential of gas measurements on benthic and planktonic foraminifers from core SU90-08 (43°03′1″N, 30°02′5″W, 3080 m). Gas mea

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Mathlouthi, Majid, and Fethi Lebdi. "Estimation of sediment deposits in the Ghézala reservoir in northern Tunisia." Proceedings of the International Association of Hydrological Sciences 377 (April 16, 2018): 35–40. http://dx.doi.org/10.5194/piahs-377-35-2018.

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Abstract. The control of sedimentation in a reservoir provides a global evaluation of the process of erosion and transportation of sediment. Knowledge of sedimentation is useful for reservoir management. Bathymetric surveys can be used to assess the silting volume of dams. The results of two surveys of the Ghézala dam reservoir in northern Tunisia are available. The measurements provide initial information about the quantity and variability of silting and the mechanism of sediment deposition. According to the results of measurements, the average annual specific sediment yield of the Ghézala da

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Salama, Tedy Harianto, Sri Maryati, and Intan Noviantari Manyoe. "Studi Mekanisme Sedimentasi Formasi Dolokapa, Gorontalo." Jambura Geoscience Review 3, no. 2 (2021): 97–111. http://dx.doi.org/10.34312/jgeosrev.v3i2.8475.

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The Dolokapa Formation is a sedimentary rock formation formed in a deep-sea depositional environment with a fairly complex level of deformation and tectonic arrangement. Analysis of the sedimentation mechanism is carried out to determine how much tectonic influence on the mechanisms that occur in a depositional environment and the variations in the sedimentation mechanism formed. Research on the sedimentation mechanism needs to be carried out to determine the history of the formation of Gorontalo sedimentary rocks, especially in the Dolokapa Formation which was formed during the Miocene. The p

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Pazdur, Anna, Mieczyslaw F. Pazdur, Leszek Starkel, and Joachim Szulc. "Stable Isotopes of Holocene Calcareous Tufa in Southern Poland as Paleoclimatic Indicators." Quaternary Research 30, no. 2 (1988): 177–89. http://dx.doi.org/10.1016/0033-5894(88)90022-1.

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The isotopic composition of oxygen in freshwater calcareous tufa seems to be a sensitive indicator of past climatic changes. Results of measurements of δc18O and δc13C in tufa samples dated with the 14C method are used to reconstruct Holocene climatic changes in southern Poland. Values of δc18O obtained on tufa samples from four sites (Raclawka, Rzerzuŝnia, Trzebienice, Sieradowice) representing different hydrodynamic conditions of tufa sedimentation seem to form a selfconsistent series. These values, with some simplifying assumptions concerning the course of tufa sedimentation, were therefore

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Saenab, Sarti, Rahmat Zarkasyi Ramadhani, Usman, Makhrajani Majid, and Iradhatullah Rahim. "Decrease levels of total suspended solid in tofu liquid waste using biocoagulant charcoal." IOP Conference Series: Earth and Environmental Science 886, no. 1 (2021): 012080. http://dx.doi.org/10.1088/1755-1315/886/1/012080.

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Abstract A coagulant is a chemical needed by water to help settle small particles that cannot settle on their own. Meanwhile, total suspended solids (TSS) result from filter dissolved solids by gravity deposition, usually in chloride particles, and indicate the sedimentation rate. This study aimed to determine the effectiveness of bio coagulants to reduce levels of total suspended solids (TSS) in liquid tofu waste to find out which one is more effective as a bio coagulant in liquid tofu waste. This research is experimental, consisting of 2 stages: the manufacture of charcoal from bio coagulant

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Vaikasas, Saulius, and Alfonsas Rimkus. "Hydraulic Modelling of Suspended Sediment Deposition in an Inundated Floodplain of the Nemunas Delta." Hydrology Research 34, no. 5 (2003): 519–30. http://dx.doi.org/10.2166/nh.2003.0022.

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Floods of meadows in the delta of the river Nemunas contribute to the deposition and retention of sediments and nutrient that would otherwise deposit in the Curonian Lagoon. In grassland area of the Nemunas delta the formation of alluvial soil occurs according to the flood dynamic rules: water discharging into the valley leaves suspended sediments on the soil surface. By mathematical modelling it was established that about 35% of suspended sediments inflow deposited there. Due to sand particles deposited during the study period (1950-1991), the natural river bank levee rose by 0.3 m. Fine clay

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Kawakita, Mamiko, Tetsuo Uchikoshi, Laxmidhar Besra, Tohru Suzuki, Jin Kawakita, and Yoshio Sakka. "Formation of Crystalline-Oriented Titania Thin Films on ITO Glass Electrodes by EPD in a Strong Magnetic Field." Key Engineering Materials 412 (June 2009): 143–48. http://dx.doi.org/10.4028/www.scientific.net/kem.412.143.

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Crystal-oriented and crack-free thin TiO2 films with a good interfacial adhesion on indium-tin oxide (ITO) glass substrates for photoelectrodes were fabricated by the electrophoretic deposition (EPD) method in a 12 T strong magnetic field. A binder-free suspension for the EPD was prepared by dispersing TiO2 in the mixture of 2-propanol and 2,4-pentanedione. The electrophoretic mobility and the sedimentation rate were measured at various ratios of the mixed solution. The optimized state of the suspension exhibiting the highest surface charge potential and producing deposits with the highest gre

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Eberling-Fux, N., R. Pailler, A. Guette, Sebastien Bertrand, and Eric Philippe. "Impregnation of 3D Woven Carbon Fibre Preforms by Electrophoretic Deposition of Single and Mix of Non Oxide Ceramic Nanoscale Powders, and Densification of the Composite Material." Advances in Science and Technology 50 (October 2006): 91–96. http://dx.doi.org/10.4028/www.scientific.net/ast.50.91.

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3D woven carbon fibre preforms (~ 2 mm thickness) were impregnated with single or mixture of non oxide ceramic nanoscale powders in ethanolic suspensions using electrophoretic deposition (EPD). The measurement of the ζ potential of the suspension compared with its behaviour in sedimentation permits to conclude about the optimal concentration of surfactant necessary to get the most stable suspension. The experimental results were in agreement with the theoretical ones obtained using DLVO (Derjaguin, Landau, Verwey and Overbeek) theory. EPDs were carried out by applying a constant voltage betwee

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Pakshyn, Maksym, Ivan Lyaska, Kostyantyn Burak, et al. "ESTIMATION OF EARTH’S SURFACE MOVES AND DEFORMATION OF THE TERRITORY OF MINE “KHOTIN” OF KALUSH-GOLINSKYY FIELD BY METHOD OF RADAR INTERFEROMETRY." Geodesy and cartography 45, no. 5 (2019): 37–42. http://dx.doi.org/10.3846/gac.2019.6300.

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The article present processing techniques of radar data for calculating the deformations of the earth’s surface on the example of minefield, that is situated under the exogenous influence of underground workings of the “Khotin” minery Kalush-Golinskyy deposit. The estimation of accuracy of radar image processing methods, namely, the interferometry of the permanent radar scatterers and the interferometry of a series of small baseline lines, is made, by comparison with the results of processional geometric levelling with a short beam of deformation soil rappers of the profile lines of the mine f

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Cossu, R., A. L. Forrest, H. A. Roop, et al. "Seasonal variability in turbidity currents in Lake Ohau, New Zealand, and their influence on sedimentation." Marine and Freshwater Research 67, no. 11 (2016): 1725. http://dx.doi.org/10.1071/mf15043.

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Layers of sediment that are deposited on the floor of Lake Ohau, New Zealand, offer a means to reconstruct past climate conditions in the Southern Hemisphere at subdecadal and annual resolution. A robust understanding of the modern physical processes that control the influx and dispersal of sediment in the lake is required to reconstruct climate from these sedimentary archives. In this study, water temperature and velocity measurements collected during 2012–13 were analysed to determine the primary physical processes that influence sediment transport in the lake. Sediment input from river infl

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Berger, Glenn W., Sara Ante, and Eugene W. Domack. "Seasonal and water-depth variations in sediment luminescence and in sedimentation from sediment trap samples at Gerlache Strait, Antarctic Peninsula." Antarctic Science 21, no. 5 (2009): 483–99. http://dx.doi.org/10.1017/s0954102009990186.

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AbstractSediment trap arrays were deployed in Brialmont Cove and Andvord Bay, eastern Gerlache Strait, from December 2001–March 2003. The recovered sediments (representing instantaneous deposition from the viewpoint of luminescence dating) encompass all the annual and local glaciomarine depositional processes. Magnetic susceptibility profiles were used to infer seasonality in the trap cores, and thus to select subsamples for luminescence measurements. Multi-aliquot infrared stimulated luminescence (IRSL) apparent ages were used to assess the effectiveness of ‘clock zeroing’ (by daylight) of li

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Bufalini, Margherita, Marco Materazzi, Chiara Martinello, et al. "Soil Erosion and Deposition Rate Inside an Artificial Reservoir in Central Italy: Bathymetry versus RUSLE and Morphometry." Land 11, no. 11 (2022): 1924. http://dx.doi.org/10.3390/land11111924.

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This study, using different direct and indirect methodologies, evaluated the sedimentation rate in an artificial reservoir in central Italy. This reservoir is regionally representative and was built in the 1960s for hydroelectric purposes; it has experienced a strong decrease in trap efficiency and a loss of over 70% of the stored water volume. Direct measurements of the lake bottom bathymetry, carried out in 2006 and 2015, and 3D reconstructions performed in a GIS environment, made it possible to calculate the volume of filling material and to verify an increasing trend in the sedimentation r

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Amelia, Fatihaturrizky, Owen Jacob Notonugroho, Satyanto Krido Saptomo, and Allen Kurniawan. "Estimasi Nilai Hydraulic dan Solid Loading Rate Tipe Pengendapan Diskrit dan Flok Pada Proses Lumpur Aktif Untuk Pengolahan Limbah Cair Industri Kertas." Jurnal Ilmu Lingkungan 20, no. 3 (2022): 445–56. http://dx.doi.org/10.14710/jil.20.3.445-456.

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Beban limbah cair industri kertas meningkat seiring dengan peningkatan produksi kertas di Indonesia. Konsentrasi COD berkisar antara 8.300–45.384 mg/L O2 dan TSS sebesar 41.000 mg/L. Salah satu upaya untuk mengurangi beban COD dan TSS di dalam limbah cair industri kertas adalah dengan memanfaatkan proses lumpur aktif. Penelitian ini difokuskan pada pengaruh proses sedimentasi di dalam unit lumpur aktif untuk mereduksi COD dan TSS. Penelitian ini juga mencakup analisis dua tipe pengendapan, yaitu pengendapan partikel diskrit dan pengendapan flok. Tujuan utama penelitian ini untuk mengestimasi n

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Baljyan, Pargev, Sedrak Sedrakyan, and Ani Manukyan. "Determination of Sediment Accumulation Volume and its Deposition in the Khachen Reservoir." Advanced Materials Research 1020 (October 2014): 756–59. http://dx.doi.org/10.4028/www.scientific.net/amr.1020.756.

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The study of silts settling nature in reservoirs and assessment of their accumulation volume are of significant importence and have direct relation to the water balance, evaluation of the actual volume for the reservoir regulation, and effective use of water resources. The purpose of this work is determination of accumulated amount of sediments and their settling pattern along the Khachen reservoir in the Republic of Nagorno Karabagh on the basis of analytic and field study. During 2012-2013 a number of field studies have been carried out designed to elucidate conditions under which mud and si

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Kontakiotis, George, Leonidas Moforis, Vasileios Karakitsios, and Assimina Antonarakou. "Sedimentary Facies Analysis, Reservoir Characteristics and Paleogeography Significance of the Early Jurassic to Eocene Carbonates in Epirus (Ionian Zone, Western Greece)." Journal of Marine Science and Engineering 8, no. 9 (2020): 706. http://dx.doi.org/10.3390/jmse8090706.

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Sedimentological, micropalaeontological, and marine geological results from the Early Jurassic to Eocene carbonate formations of the Ionian zone, from six localities of Epirus, provide new insights into the basin palaeogeographic evolution and better correlation with coeval analogous tectono-stratigraphic successions along the southern margin of the Neo-Tethys Ocean. Facies analysis allowed the recognition of several microfacies types and their depositional characteristics. During the Early Jurassic, autochthonous carbonates (Pantokrator Limestones) were deposited in shallow-water environment.

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Marelle, Louis, Jean-Christophe Raut, Kathy S. Law, et al. "Improvements to the WRF-Chem 3.5.1 model for quasi-hemispheric simulations of aerosols and ozone in the Arctic." Geoscientific Model Development 10, no. 10 (2017): 3661–77. http://dx.doi.org/10.5194/gmd-10-3661-2017.

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Abstract. In this study, the WRF-Chem regional model is updated to improve simulated short-lived pollutants (e.g., aerosols, ozone) in the Arctic. Specifically, we include in WRF-Chem 3.5.1 (with SAPRC-99 gas-phase chemistry and MOSAIC aerosols) (1) a correction to the sedimentation of aerosols, (2) dimethyl sulfide (DMS) oceanic emissions and gas-phase chemistry, (3) an improved representation of the dry deposition of trace gases over seasonal snow, and (4) an UV-albedo dependence on snow and ice cover for photolysis calculations. We also (5) correct the representation of surface temperatures

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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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Chalov, Sergey, and Kristina Prokopeva. "Sedimentation and Erosion Patterns of the Lena River Anabranching Channel." Water 14, no. 23 (2022): 3845. http://dx.doi.org/10.3390/w14233845.

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Lena River is one of the largest “pristine” undammed river systems in the World. In the middle and low (including delta) 1500 km course of the Lena main stem river forms complex anabranching patterns which are affected by continuous permafrost, degradation of the frozen ground and changes in vegetation (taiga and tundra). This study provides a high-resolution assessment of sediment behavior along this reach. Comprehensive hydrological field studies along the anabranching channel located in the middle, low and delta courses of the Lena River were performed from 2016 to 2022 including acoustic D

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Kubinský, Daniel, Karol Weis, Milan Lehotský, and Jakub Fuska. "Changes to the Bakomi Reservoir." Acta Regionalia et Environmentalica 11, no. 1 (2014): 1–4. http://dx.doi.org/10.2478/aree-2014-0001.

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Abstract This article is focused on the analysis and evaluation of the changes of the bottom of the Bakomi reservoir, the total volume of the reservoir, ecosystems, as well as changes in the riparian zone of the Bakomi reservoir (situated in the central Slovakia). Changes of the water component of the reservoir were subject to the deposition by erosion-sedimentation processes, and were identifed on the basis of a comparison of the present relief of the bottom of reservoir obtained from feld measurements (in 2011) with the relief measurements of the bottom obtained from the 1971 historical maps

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Provenzano, Giuseppe, Antonis Zervos, Mark E. Vardy, and Timothy J. Henstock. "Characterization of shallow overpressure in consolidating submarine slopes via seismic full waveform inversion." Quarterly Journal of Engineering Geology and Hydrogeology 53, no. 3 (2020): 366–77. http://dx.doi.org/10.1144/qjegh2019-019.

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Pore pressures higher than hydrostatic correspond to localized reductions of the level of shear stress required to induce lateral mass movement in a slope, and therefore play a key role in preconditioning submarine landsliding. In this paper, we investigate whether multi-channel seismic reflection data can be used to infer potentially destabilizing pore-pressure levels at a resolution and sensitivity useful for in-situ slope stability characterization. We simulate the continuous deposition of sediment on consolidating slopes in two scenarios, with combinations of sedimentation rate and permeab

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Rothacker, Leo, Alexander Dreves, Frank Sirocko, Pieter M. Grootes, and Marie-Josée Nadeau. "Dating Bulk Sediments from Limnic Deposits Using a Grain-Size Approach." Radiocarbon 55, no. 2 (2013): 943–50. http://dx.doi.org/10.1017/s0033822200058094.

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Radiocarbon measurements on bulk subaqueous sediments typically provide ages significantly older than actual time of deposition. This is generally caused by the presence of reworked organic compounds, which are depleted in 14C. To explore this issue of age heterogeneity, we collected 4 organic-rich samples from varying depths in a lake sediment core at the Gemündener Maar (Eifel, Germany), a lake of volcanic origin. We divided each sample into 5 standard grain-size fractions: gravel, sand, silt, clay, and 1 fraction smaller than 0.45 μm. These were cleaned separately using a standard acid-alka

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Fetrow, Anne C., Kathryn E. Snell, Russell V. Di Fiori, Sean P. Long, and Joshua W. Bonde. "Early Sevier orogenic deformation exerted principal control on changes in depositional environment recorded by the Cretaceous Newark Canyon Formation." Journal of Sedimentary Research 90, no. 9 (2020): 1175–97. http://dx.doi.org/10.2110/jsr.2020.52.

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ABSTRACT Terrestrial sedimentary archives record critical information about environment and climate of the past, as well as provide insights into the style, timing, and magnitude of structural deformation in a region. The Cretaceous Newark Canyon Formation, located in central Nevada, USA, was deposited in the hinterland of the Sevier fold–thrust belt during the North American Cordilleran orogeny. While previous research has focused on the coarser-grained, fluvial components of the Newark Canyon Formation, the carbonate and finer-grained facies of this formation remain comparatively understudie

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Ghrabi, A., and M. Ferchichi. "Sediment accumulation in a series of four pilot-scale stabilization ponds." Water Science and Technology 30, no. 8 (1994): 281–84. http://dx.doi.org/10.2166/wst.1994.0425.

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Settling and accumulation of sediments have been measured on the bottom of the facultative and three maturation ponds of a series of pilot-scale stabilization ponds. The mean deposition rate in the facultative pond showed that the attempt to establish a short-term sedimentation by in situ measurements failed. The rates were largely overestimated and the values calculated from the sediment accumulated in a long-term are closer to the reality. The sediment depth increase rates are 5 cm/year for the facultative pond and 1.3 cm/year for second and third maturation ponds. In the last maturation pon

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Lashgari, Mohsen, and Farzaneh Hosseini. "Lead-Silver Anode Degradation during Zinc Electrorecovery Process: Chloride Effect and Localized Damage." Journal of Chemistry 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/538462.

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Using mass-loss, potentiodynamic polarization, and electrochemical impedance measurements under anodic regime, the corrosion behaviour of lead-silver (0.55%) electrode in zinc electrowinning solution containing different concentration of chloride anions was studied. The results revealed that the rate of corrosion does not monotonically increase with concentration. Moreover, the maximum degradation occurs at the concentration where the anodic process (oxygen evolution) proceeds hardly. According to polarization curves, the electrode exhibited obvious electrocatalytic activity (for anode reactio

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Vogel, J. S., Madeleine Briskin, D. E. Nelson, and J. R. Southon. "Ultra-Small Carbon Samples and the Dating of Sediments." Radiocarbon 31, no. 03 (1989): 601–9. http://dx.doi.org/10.1017/s0033822200012194.

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Radiocarbon dates from sediment core samples are usually obtained on the whole organic carbon portion in order to use as little of the valuable sediment as possible. Such measurements may not result in an accurate chronology of the sediment because the material may include carbon from different reservoirs at the time of deposition. The development of AMS techniques for dating ultra-small (20–500μg) carbon samples permits dating various components of cored sediments. We give examples of physical and chemical fractions of sediments which illustrate the large differences in ages obtainable from m

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Poulos, S. E., and P. G. Drakopoulos. "CURRENT ACTIVITY IN THE THERMAIKOS GULF CONTINENTAL MARGIN , IN RELAÏJON TO MODERN SEDIMENTATION PROCESSES." Bulletin of the Geological Society of Greece 36, no. 2 (2018): 1103. http://dx.doi.org/10.12681/bgsg.16915.

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The area under investigation represents the NW continental margin of the Aegean Sea i.e. the Thermaikos Gulf and the associated NW Sporades Basin. Surficial seabed sediments are of terrigenous origin whilst in terms of grain size, offshore sediments maybe distinguished into silty sediments that cover the northern and western part of the Gulf; clayey that cover the floor of the Sporades basin and relict sands that cover mainly the central and eastern part of the self. Current meter measurements from different water depths were obtained from 10 stations on the shelf, shelf/break, within canyons

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Kaitna, R., M. Chiari, M. Kerschbaumer, et al. "Physical and numerical modelling of a bedload deposition area for an Alpine torrent." Natural Hazards and Earth System Sciences 11, no. 6 (2011): 1589–97. http://dx.doi.org/10.5194/nhess-11-1589-2011.

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Abstract. Floods including intensive bedload transport represent a severe hazard to the often densely populated alluvial fans of small Alpine watersheds. In order to minimize the risk of future inundation, an existing bedload deposition area on the fan upstream of the village Vorderberg in southern Austria is planned for reconstruction. The suggested concept for protection measures includes dividing the area into three similar sections of reduced slope. The three sections are to be separated by a block ramp. To test this concept and to optimize the sedimentation process, an analysis was perfor

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Sicard, Michaël, Oriol Jorba, Jiang Ji Ho, et al. "Measurement report: Characterization of the vertical distribution of airborne <i>Pinus</i> pollen in the atmosphere with lidar-derived profiles – a modeling case study in the region of Barcelona, NE Spain." Atmospheric Chemistry and Physics 21, no. 23 (2021): 17807–32. http://dx.doi.org/10.5194/acp-21-17807-2021.

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Abstract. This paper investigates the mechanisms involved in the dispersion, structure, and mixing in the vertical column of atmospheric pollen. The methodology used employs observations of pollen concentration obtained from Hirst samplers (we will refer to this as surface pollen) and vertical distribution (polarization-sensitive lidar), as well as nested numerical simulations with an atmospheric transport model and a simplified pollen module developed especially for this study. The study focuses on the predominant pollen type, Pinus, of the intense pollination event which occurred in the regi

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van der Deijl, Eveline Christien, Marcel van der Perk, and Hans Middelkoop. "Establishing a sediment budget in the newly created “Kleine Noordwaard” wetland area in the Rhine–Meuse delta." Earth Surface Dynamics 6, no. 1 (2018): 187–201. http://dx.doi.org/10.5194/esurf-6-187-2018.

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Abstract. Many deltas are threatened by accelerated soil subsidence, sea-level rise, increasing river discharge, and sediment starvation. Effective delta restoration and effective river management require a thorough understanding of the mechanisms of sediment deposition, erosion, and their controls. Sediment dynamics has been studied at floodplains and marshes, but little is known about the sediment dynamics and budget of newly created wetlands. Here we take advantage of a recently opened tidal freshwater system to study both the mechanisms and controls of sediment deposition and erosion in ne

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Aalto, Rolf, and Charles A. Nittrouer. "210 Pb geochronology of flood events in large tropical river systems." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, no. 1966 (2012): 2040–74. http://dx.doi.org/10.1098/rsta.2011.0607.

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Floodplain sedimentation removes particles from fluvial transport and constructs stratigraphic records of flooding, biogeochemical sequestration and other aspects of the environmental history of river basins—insight that is enhanced by accurate geochronology. The natural fallout radionuclide 210 Pb, often employed to date lacustrine and marine sediments, has previously been used to determine floodplain accumulation rates over decadal-to-century time scales using the assumption that both input concentration and sediment accumulation rates are constant. We test this model in approximately 110 co

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Nelson, W. A. "Calcified macroalgae - critical to coastal ecosystems and vulnerable to change: a review." Marine and Freshwater Research 60, no. 8 (2009): 787. http://dx.doi.org/10.1071/mf08335.

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Calcified macroalgae are distributed in marine habitats from polar to tropical latitudes and from intertidal shores to the deepest reaches of the euphotic zone. These algae play critical ecological roles including being key to a range of invertebrate recruitment processes, functioning as autogenic ecosystem engineers through provision of three-dimensional habitat structure, as well as contributing critical structural strength in coral reef ecosystems. Calcified macroalgae contribute significantly to the deposition of carbonates in coastal environments. These organisms are vulnerable to human-i

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Ahn, J. H., and S. B. Grant. "Characteristics of storm runoff and sediment dispersal in the San Pedro Channel, southern California." Water Science and Technology 55, no. 1-2 (2007): 519–26. http://dx.doi.org/10.2166/wst.2007.032.

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In-site measurements of particle size spectra were obtained from three offshore cruises to evaluate the physical consequences of increased sediment transport and deposition offshore which was caused by episodic storm runoff water from the Santa Ana River watershed, a highly urbanised coastal watershed in southern California. Of the total annual runoff discharge to the coastal ocean, 89.2% occurred in the 2003/2004 winter season, and 0.22 Mt of sediment mass was transported during the storm events. The runoff plume at surface taken offshore by cross-shore currents progressed rapid aggregation a

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