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Journal articles on the topic 'Sortingl and Grain-size'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Akinmosin, A., and O.O Osinowo. "SEDIMENTOLOGICAL CHARACTERISTICS OF THE NIGERIAN TAR SAND DEPOSITS IN PARTS OF SOUTHWESTERN NIGERIA." Continental J. Earth Sciences 3 (July 7, 2008): 8–21. https://doi.org/10.5281/zenodo.824293.

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Particle size distribution of some Afowo tar sands as well as mineralogical and bitumen saturation analyses were carried out with the aim of elucidating the sedimentological properties of the deposits. Fifty samples of tar sands of the Afowo Formation in parts of south western Nigeria were subjected to granulometric and petrological analyses to determine the particle size distribution as well as other textural characteristics. Three of the samples were analyzed for phase identification using Phillips PW 1050 diffractometer equipped with Cu X-ray source and operated at 40kV and 30Ma. The result

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2

Xue, Jie, Jia Qiang Lei, Sheng Yu Li, Cui Wang, Jie Zhou, and Dong Lei Mao. "Variability of Grain Size of Surface Sand on Nebkhas at the Southern Fringe of the Taklimakan Desert, China." Advanced Materials Research 1092-1093 (March 2015): 1275–82. http://dx.doi.org/10.4028/www.scientific.net/amr.1092-1093.1275.

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Nebkha plays a major role in the ecological and environmental stabilization by accumulating wind-blown sediments around shrubs. Grain-size characteristics of different positions on nebkha reflect the sorting effect of aeolian dynamics. Based on the collected sand grains of different positions on four types of nebkhas at the southern fringe of Taklimakan Desert, China, this paper provided detailed insight into variability of the grain size of surface sand on nebkhas. The results showed that: a) Grain-size distributions on shield-shaped Karelinia caspica Nebkhas under natural condition had the l

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Jutzeler, Martin, Jocelyn McPhie, Sharon R. Allen, and A. A. Proussevitch. "Grain-size distribution of volcaniclastic rocks 2: Characterizing grain size and hydraulic sorting." Journal of Volcanology and Geothermal Research 301 (August 2015): 191–203. http://dx.doi.org/10.1016/j.jvolgeores.2015.05.019.

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4

Tejas, R. Patil, S. Gadekar Anil, and M. Jogdand Rajendra. "Grain-size variation in the River sediments: an analysis of Godavari River, India." Int. Res. Journal of Science & Engineering, 2023, Volume 11(3): 131-141. 11, no. 3 (2023): 131–41. https://doi.org/10.5281/zenodo.8292727.

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In the present study, we determined grain-size variation in bed sediments of Godavari River in order to evaluate the controlling factors on grain size variation of the River sediments. Sediment samples were collected to cover the different lithological units including Deccan Volcanic Provenance (DVP), Precambrian granites/gneisses and Gondwana sedimentary rocks traversed by the Godavari River and its tributaries. The bed sediment sample of Godavari traversing DVP at Darnasangvi shows unimodal distribution of grain size but the samples from Paithan, Rakshasbhuvan, Limba and Balegoan show bimoda

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Xiao, Yi, Hong Wang, and Xuejun Shao. "2D numerical modeling of grain-sorting processes and grain size distributions." Journal of Hydro-environment Research 8, no. 4 (2014): 452–58. http://dx.doi.org/10.1016/j.jher.2013.08.002.

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6

Spalding, Heather, Kanesa Duncan, and Zoe Norcross-Nu'u. "Sorting Out Sediment Grain Size and Plastic Pollution." Oceanography 22, no. 4 (2009): 244–50. http://dx.doi.org/10.5670/oceanog.2009.117.

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7

SHIMIZU, Tatsuya, Akio KOBAYASHI, Takaaki UDA, Takayuki KUMADA, Yasuhito NOSHI, and Masumi SERIZAWA. "Numerical Simulation of Grain Size Sorting at Beach Cusps." PROCEEDINGS OF COASTAL ENGINEERING, JSCE 54 (2007): 691–95. http://dx.doi.org/10.2208/proce1989.54.691.

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8

Bartholomä, A., and B. W. Flemming. "Progressive grain-size sorting along an intertidal energy gradient." Sedimentary Geology 202, no. 3 (2007): 464–72. http://dx.doi.org/10.1016/j.sedgeo.2007.03.010.

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9

LIFFMAN, Kurt. "Chondrule and metal grain size sorting from jet flows." Meteoritics & Planetary Science 40, no. 1 (2005): 123–38. http://dx.doi.org/10.1111/j.1945-5100.2005.tb00367.x.

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10

AKPOFURE, Edirin, and Lisa Erebi JONATHAN. "Determination of Variation in Current Energy and Sediment Dispersal Patterns Using Grain Size Statistical Parameters in Ajali Sandstone." International Journal of Research and Innovation in Applied Science X, no. II (2025): 249–60. https://doi.org/10.51584/ijrias.2025.10020021.

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Grain size statistical parameters derived from Ajali Sandstone outcropping in Ayogwiri, Fugar and Orame in the Western Anambra Basin were used to determine the variation in current energy and sediment dispersal pattern. The sandstone was logged in the three locations: Ayogwiri, Fugar and Orame, and samples collected for grain size analysis. Statiscal parameters such as the mean, sorting and skewness were derived to enable the study. The average mean value for Ayogwiri is 4.29 (coarse silt), Fugar has an average of 3.63 (very fine sand) and Orame with an average of 3.78 (very fine sand). The va

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Daniels, Melinda D. "Grain-Size Sorting in Meander Bends Containing Large Woody Debris." Physical Geography 27, no. 4 (2006): 348–62. http://dx.doi.org/10.2747/0272-3646.27.4.348.

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12

Sun, Zhongqiang, Shuangyue Lin, Cheng Peng, Songying Luo, Zhihui Cheng, and Xiuli Song. "Hydrodynamic Analysis of Sediment Deposition in Mangrove Wetlands of Zhanjiang Bay-Based on the Perspective of Sediment Grain Size." International Journal of Energy and Environmental Science 9, no. 5 (2024): 86–97. http://dx.doi.org/10.11648/j.ijees.20240905.11.

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Grain size is an important parameter reflecting the characteristics of sedimentary dynamics, and mangrove wetland sediments record abundant sedimentary environmental information during transportation and deposition. To investigate the vertical characteristics of sediment grain size and sedimentary dynamic processes in the mangrove wetlands of Zhanjiang Bay, this study analyzed the grain size parameters, frequency distribution curves, and hydrodynamic characteristics of sediment cores collected from the mangrove wetlands in Nansan Island (A), the south of Techeng Island (B), Guanhai Promenade (

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13

Lin, Yongchong, Guijin Mu, and Lishuai Xu. "Grain Size and Sedimentary Sorting Characteristics of Atmospheric Dust in the Cele Oasis, Southern Margin of Taklimakan Desert." Sustainability 14, no. 13 (2022): 8093. http://dx.doi.org/10.3390/su14138093.

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Grain size is a proxy indicator of airflow intensity and also provides a scientific basis for the prevention of dust hazards. However, the variations in grain size characteristics that occur during transport and deposition processes are seldom discussed. Here, atmospheric dust samples were collected before and after deposition in a sand–dust storm for grain size analysis. The results showed that the grain size distributions of the atmospheric dust were unimodal during transportation but always became bimodal after deposition. This indicates that the bimodal grain size distribution of the aeoli

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14

Noshi, Yasuhito, Takaaki Uda, Masumi Serizawa, Takayuki Kumada, and Akio Kobayashi. "MODEL FOR PREDICTING BATHYMETRIC AND GRAIN SIZE CHANGES BASED ON BAGNOLD’S CONCEPT AND EQUILIBRIUM SLOPE CORRESPONDING TO GRAIN SIZE COMPOSITION." Coastal Engineering Proceedings 1, no. 32 (2011): 15. http://dx.doi.org/10.9753/icce.v32.sediment.15.

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A model for predicting bathymetric and grain size changes considering the equilibrium slopes corresponding to each grain size and its composition was incorporated into the BG model proposed by Serizawa et al. (2007). The model was applied to predict the beach changes at Kemigawa Beach. The cross-shore sorting of sand, in which the grain size gradually decreases with increasing depth, and the formation of a gradually changing longitudinal slope were accurately reproduced. The model was also applied to predict the selective accumulation of fine sand in a navigation channel after dredging and its

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15

Benny, LA, NM Kennedy, JH Kirkman, and RB Stewart. "Mineralogical and textural discrimination of loess derived from a tephra near Rotorua, New Zealand." Soil Research 26, no. 2 (1988): 301. http://dx.doi.org/10.1071/sr9880301.

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Grain size parameters and clay mineralogical analyses were used to characterize and compare Okareka Ash and post-Okareka tephric loess sampled at eight sites on a transect in Rotorua district, North Island, New Zealand. Grain size distribution analyses show consistently lower mean size and better sorting of the tephric loess compared with the Okareka Ash. The mean grain size of the loess is strongly influenced by the mean grain size of the tephra. Trends in the distribution of biotite and halloysite support the grain size distribution analyses. Taken with field observations, the analytical evi

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KLEINHANS, MAARTEN G. "Grain-size sorting in grainflows at the lee side of deltas." Sedimentology 52, no. 2 (2005): 291–311. http://dx.doi.org/10.1111/j.1365-3091.2005.00698.x.

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17

LANZONI, STEFANO, and MARCO TUBINO. "Grain sorting and bar instability." Journal of Fluid Mechanics 393 (August 25, 1999): 149–74. http://dx.doi.org/10.1017/s0022112099005583.

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A two-dimensional model of flow and bed topography is proposed to investigate the effect of sediment heterogeneity on the development of alternate bars. Within the context of a linear stability theory the flow field, the bed topography and the grain size distribution function are perturbed leading to an integro-differential linear eigenvalue problem. It is shown that the selective transport of different grain size fractions and the resulting spatial pattern of sorting may appreciably affect the balance between stabilizing and destabilizing actions which govern bar instability. Theoretical resu

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Katre, Shreya, and Archana M. Nair. "Modelling the effect of grain anisotropy on inter-granular porosity." Journal of Petroleum Exploration and Production Technology 12, no. 3 (2021): 763–81. http://dx.doi.org/10.1007/s13202-021-01332-w.

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AbstractPorosity is the dominant factor that determines the exploitable capacity of sedimentary reservoir rocks. Generally, pore heterogeneity is poorly represented in subsurface geological models due to the complexity. Granular mixtures produce complex pore space controlled by grain size, grain shape, and grain sorting. Heterogeneities in pore space volume are present at micro- and nanoscales in granular mixtures due to packing conditions resulting from deposition and diagenesis. In the present study, three-dimensional packing models were generated to provide a realistic description of granul

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19

Nasution, Muhammad Arif, Rudi Hermi, Heriansyah Heriansyah, Friyuanita Lubis, and Mira Mauliza Rahmi. "Grain size properties of estuary sediment from Aceh Jaya, Aceh." Depik 13, no. 1 (2024): 54–63. http://dx.doi.org/10.13170/depik.13.1.36454.

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This study aimed to determine the sediment grain size distribution in four estuary locations in Aceh Jaya (Kuta Tuha, Lhok Geulumpang, Krueng No, Keude Unga). These findings will contribute to our understanding of sediment dynamics in estuarine environments and inform management strategies for these critical coastal habitats. The methods used in this study, such as mean, sorting, skewness, and kurtosis, and determination of sediment textural with ternary plot, were used to determine the sediment grain size distribution. In Addition, it will examine the relationship between sediment grain size

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20

Clark, Jennifer M., Mark W. Kershner, and Joseph R. Holomuzki. "Grain size and sorting effects on size-dependent responses by lotic crayfish to high flows." Hydrobiologia 610, no. 1 (2008): 55–66. http://dx.doi.org/10.1007/s10750-008-9422-0.

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21

Tan, Mai Thanh, Dinh Van Thuan, Nguyen Dich Dy, et al. "Environments of upper miocene sediments in the Hanoi depression interpreted from grain-size parameters." VIETNAM JOURNAL OF EARTH SCIENCES 41, no. 2 (2019): 182–99. http://dx.doi.org/10.15625/0866-7187/41/2/13798.

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The grain-size analysis is carried out for 49 samples of Upper Miocene sediments taken from three boreholes in the Hanoi depression. The statistic parameters of the grain size distributions such as percentiles, median, graphic mean, sorting or inclusive graphic standard deviation, inclusive graphic skewness, and graphic kurtosis are used to decipher the depositional environments and transportation mechanisms of sediments. Bivariate plotting of these parameters, the discriminant functions with four basic parameters of graphics mean, sorting, inclusive graphic skewness and graphic kurtosis, and

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22

Tang, Liang, Shuwei Zheng, Haijun Wang, and Wentong Zhang. "Comparative Grain Size Analysis of Modern Flood Sediments Based on Graphic and Moment Methods in the Lower Yellow River (Huang He), China." Applied Sciences 13, no. 15 (2023): 8934. http://dx.doi.org/10.3390/app13158934.

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Grain size analysis of flood sediments is a key method for understanding the sedimentary environments of rivers worldwide; however, there is limited knowledge of how to effectively reflect the sedimentary environment of lower Yellow River (Huang He) flood events using grain size parameters. In this study, two widely used grain size analysis methods, the graphic method (GM) and moment method (MM), were compared, and their applicability to flood sediment analysis in the lower Yellow River was evaluated. Modern flood sediments (n = 143) in the lower Yellow River featured a fine-grained texture an

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23

Barndorff-Nielsen, O. E. "Sorting, texture and structure." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 96 (1989): 167–79. http://dx.doi.org/10.1017/s0269727000010915.

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SynopsisSands are sorted by the actions of air and water. A mathematical–physical model for the ensuing spatial and temporal variations in the size distributions of the sand grains is outlined. A crucial element in aeolian sorting and transport of sand is the process that takes place when a saltating grain impinges on the sand surface. This raises the problem of describing the texture of sand surfaces. Some initial empirical and mathematical findings concerning this problem are discussed. A closely connected question is that of how the grains in a sand deposit are packed and how this relates t

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Guerit, L., L. Barrier, C. Narteau, et al. "The Grain-size Patchiness of Braided Gravel-Bed Streams – example of the Urumqi River (northeast Tian Shan, China)." Advances in Geosciences 37 (February 11, 2014): 27–39. http://dx.doi.org/10.5194/adgeo-37-27-2014.

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Abstract. In gravel-bed rivers, sediments are often sorted into patches of different grain-sizes, but in braided streams, the link between this sorting and the channel morpho-sedimentary elements is still unclear. In this study, the size of the bed sediment in the shallow braided gravel-bed Urumqi River is characterized by surface-count and volumetric sampling methods. Three morpho-sedimentary elements are identified in the active threads of the river: chutes at flow constrictions, which pass downstream to anabranches and bars at flow expansions. The surface and surface-layer grain-size distri

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Nguyễn, Văn Hiếu, Hồng Minh Nguyễn, Ngọc Quốc Phan, and Huy Giao Phạm. "Development of HFU-based permeability prediction models using core data for characterisation of a heterogeneous Oligocene sand in the Nam Con Son basin." Petrovietnam Journal 10 (November 30, 2021): 33–39. http://dx.doi.org/10.47800/pvj.2021.10-03.

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Core data by both routine and special core analysis are required to understand and predict reservoir petrophysical characteristics. In this research, a total number of 50 core plugs taken from an Oligocene sand (T30) in the Nam Con Son basin, offshore southern Vietnam, were tested in the core laboratory of the Vietnam Petroleum Institute (VPI). The results of routine core analysis (RCA) including porosity and permeability measurements were employed to divide the study reservoir into hydraulic flow units (HFUs) using the global hydraulic elements (GHEs) approach. Based on five classified

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Salawati, Salawati, Yoga Satria Putra, Muhardi Muhardi, Nurhasanah Nurhasanah, and Riza Adriat. "The statistical parameters analysis of bed load grains in Sungai Kakap Waters, Kubu Raya Regency." Acta Aquatica: Aquatic Sciences Journal 9, no. 3 (2022): 170. http://dx.doi.org/10.29103/aa.v9i3.9512.

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This study aims to analyze the statistical parameters of bed load grains in Sungai Kakap Waters, Kubu Raya Regency, West Kalimantan Province. Bed load sampling was carried out at seven stations, with five sampling points each. The hydrometer test on the sample was carried out to determine the grain type and size of the bed load, and statistical parameter analysis to determine the mean size, sorting, skewness, and kurtosis. The results showed that the fraction of bed load in the form of sand was 38.54%, silt was 42.11%, and clay was 19.28%. The bed load was dominated by three types, clayey clay

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Salawati, Salawati, Yoga Satria Putra, Muhardi Muhardi, Nurhasanah Nurhasanah, and Riza Adriat. "The statistical parameters analysis of bed load grains in Sungai Kakap Waters, Kubu Raya Regency." Acta Aquatica: Aquatic Sciences Journal 9, no. 3 (2022): 170. http://dx.doi.org/10.29103/aa.v9i3.8686.

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This study aims to analyze the statistical parameters of bed load grains in Sungai Kakap Waters, Kubu Raya Regency, West Kalimantan Province. Bed load sampling was carried out at seven stations, with five sampling points each. The hydrometer test on the sample was carried out to determine the grain type and size of the bed load, and statistical parameter analysis to determine the mean size, sorting, skewness, and kurtosis. The results showed that the fraction of bed load in the form of sand was 38.54%, silt was 42.11%, and clay was 19.28%. The bed load was dominated by three types namely clay

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Sun, Zhilin, Haolei Zheng, and Lixia Sun. "Analysis on the Characteristics of Bed Materials in the Jinghong Reservoir on the Lancang River." Sustainability 13, no. 12 (2021): 6874. http://dx.doi.org/10.3390/su13126874.

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Nine samples of bed materials along the Jinghong reservoir on the Lancang River were obtained using a gravity sampler. The grain size characteristics of the samples were analyzed by the laser diffraction particle size analyzer. The results show that the median grain size of bed materials is in the range of 6.7 to 18.9 µm. From the upstream to the front of the dam, the overall grain size of the bed materials tends to decrease significantly; the sorting is poor but becomes better along the way; the skewness gradually changes from negative to near symmetrical; the kurtosis is platykurtic and meso

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Brodal, Guro, Heidi Udnes Aamot, Marit Almvik, and Ingerd Skow Hofgaard. "Removal of Small Kernels Reduces the Content of Fusarium Mycotoxins in Oat Grain." Toxins 12, no. 5 (2020): 346. http://dx.doi.org/10.3390/toxins12050346.

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Cereal grain contaminated by Fusarium mycotoxins is undesirable in food and feed because of the harmful health effects of the mycotoxins in humans and animals. Reduction of mycotoxin content in grain by cleaning and size sorting has mainly been studied in wheat. We investigated whether the removal of small kernels by size sorting could be a method to reduce the content of mycotoxins in oat grain. Samples from 24 Norwegian mycotoxin-contaminated grain lots (14 from 2015 and 10 from 2018) were sorted by a laboratory sieve (sieve size 2.2 mm) into large and small kernel fractions and, in addition

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UDA, Takaaki, Hiroshi MIZUGAKI, Koichi UNO, Yasuhiro OOKI, and Kazuya SAKAI. "LONGSHORE SORTING OF GRAIN SIZE OF FORESHORE MATERIAL ALONG NORTHERN KUJUKURI BEACH." Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 70, no. 2 (2014): I_726—I_731. http://dx.doi.org/10.2208/jscejoe.70.i_726.

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Neill, Simon P. "A numerical study of lateral grain size sorting by an estuarine front." Estuarine, Coastal and Shelf Science 81, no. 3 (2009): 345–52. http://dx.doi.org/10.1016/j.ecss.2008.11.009.

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32

Vegt, Helena, Joep E. A. Storms, Dirk‐Jan R. Walstra, Kjetil Nordahl, Nick C. Howes, and Allard W. Martinius. "Grain size fractionation by process‐driven sorting in sandy to muddy deltas." Depositional Record 6, no. 1 (2019): 217–35. http://dx.doi.org/10.1002/dep2.85.

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Leduc, P., P. Ashmore, and J. T. Gardner. "Grain sorting in the morphological active layer of a braided river physical model." Earth Surface Dynamics 3, no. 4 (2015): 577–85. http://dx.doi.org/10.5194/esurf-3-577-2015.

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Abstract. A physical scale model of a gravel-bed braided river was used to measure vertical grain size sorting in the morphological active layer aggregated over the width of the river. This vertical sorting is important for analyzing braided river sedimentology, for numerical modeling of braided river morphodynamics, and for measuring and predicting bedload transport rate. We define the morphological active layer as the bed material between the maximum and minimum bed elevations at a point over extended time periods sufficient for braiding processes to rework the river bed. The vertical extent

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Leduc, P., P. Ashmore, and J. T. Gardner. "Grain sorting in the morphological active layer of a braided river physical model." Earth Surface Dynamics Discussions 3, no. 3 (2015): 577–600. http://dx.doi.org/10.5194/esurfd-3-577-2015.

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Abstract. A physical scale model of a gravel-bed braided river was used to measure vertical grain size sorting in the morphological active layer aggregated over the width of the river. This vertical sorting is important for analyzing braided river sedimentology, for numerical modeling of braided river morpho-dynamics and for measuring and predicting bed load transport rate. We define the morphological active layer as the bed material between the maximum and minimum bed elevations at a point over extended time periods sufficient for braiding processes to re-work the river bed. The vertical exte

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Cui, Kahlil Fredrick, Gordon G. D. Zhou, Lu Jing, Yunxu Xie, and Xueqiang Lu. "Particle size segregation and diffusion in saturated granular flows: Implications for grain sorting in debris flows." E3S Web of Conferences 415 (2023): 01003. http://dx.doi.org/10.1051/e3sconf/202341501003.

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Sorting of rocks, boulders, and silt/sand-sized particles according to their size is a characteristic feature of debris flow deposits and is an active process during flow which significantly affects the mobility. The degree at which size sorting occurs in debris flows depends on the relative magnitudes of granular processes such as particle size segregation and diffusion. Since debris flows are fluid-saturated phenomena, accurate modelling of size sorting requires the understanding of the influence of fluids on these processes, which have not been systematically studied. Here, we present simul

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Seminara, Giovanni. "Effect of Grain Sorting on the Formation of Bedforms." Applied Mechanics Reviews 48, no. 9 (1995): 549–63. http://dx.doi.org/10.1115/1.3023144.

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Grain sorting is a process observed in fluvial, coastal, and estuarian environments whereby the selective transport of different fractions of a sediment mixture gives rise to a non-uniform spatial distribution of the grain size probability density function. The formation of some fluvial bedforms (bedloadsheets and sand ridges) is shown to be generated or dominantly controlled by grain sorting. However, most bedforms (river dunes, free and forced fluvial bars, coastal ripples) are moderately affected by the sorting mechanism which is invariably found to lead to a damping effect on bedform growt

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Yuan, Rui, Bo Yang, Yingfei Liu, and Lingyu Huang. "Modified Gompertz sigmoidal model removing fine-ending of grain-size distribution." Open Geosciences 11, no. 1 (2019): 29–36. http://dx.doi.org/10.1515/geo-2019-0003.

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Abstract Because of the laboratory operating, the fineending of grain-size distribution (GSD) are simply combined as one point, which results in the information loss of the fine and very-fine clastic particles, and affects the geological parameters calculation of GSD. To remove the fine-endings, a modified Gompertz sigmoidal model is proposed in this paper. The first stage is establishing and solving the modified Gompertz sigmoidal model; the second stage is fitting and evaluating the cumulative probability and frequency of GSD; the third stage is calculating the geological parameters. Taking

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Benaafi, Mohammed, Sherif M. Hanafy, Abdullatif Al-Shuhail, Ammar El-Husseiny, and Jack Dvorkin. "Integrated Geological, Hydrogeological, and Geophysical Investigations of a Barchan Sand Dune in the Eastern Region of Saudi Arabia." Water 12, no. 3 (2020): 682. http://dx.doi.org/10.3390/w12030682.

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In arid countries such as Saudi Arabia, aeolian sand often covers a large area of the country. Understanding the variations of sand properties in dunes, including grain size, sorting, mineral composition and water content, can be important for groundwater recharge, environmental, and construction applications. Earlier studies examined properties of sand dunes by collecting samples from the surface. This study aims to investigate variations of sand properties within a Barchan sand dune in the coastal area of Saudi Arabia, by collecting samples and measurements from two vertically drilled boreho

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Grude, Sissel, Jack Dvorkin, and Martin Landrø. "Permeability variation with porosity, pore space geometry, and cement type: A case history from the Snøhvit field, the Barents Sea." GEOPHYSICS 80, no. 1 (2015): D43—D49. http://dx.doi.org/10.1190/geo2014-0064.1.

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Laboratory permeability data from the brine-filled Tubåen Formation in the Snøhvit field show an order of magnitude permeability variation for approximately the same porosity. This variation in permeability is explained by a modified Kozeny-Carman equation that exploits the relationships among permeability, porosity, cementation, and pore geometry. The expression correlates the slope in a logarithmic plot of porosity versus permeability with the amount of contact cement and sorting, and the intercept with the grain size. Additional information about sorting and/or cementation can be used to be

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Viparelli, E., A. Blom, C. Ferrer-Boix, and R. Kuprenas. "Comparison between experimental and numerical stratigraphy emplaced by prograding bedforms with a downstream slip face." Earth Surface Dynamics Discussions 1, no. 1 (2013): 1151–86. http://dx.doi.org/10.5194/esurfd-1-1151-2013.

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Abstract. A one-dimensional model that is able to store the stratigraphy emplaced by prograding bedforms with a downstream slip face is validated against experimental results. The laboratory experiment describes the migration of a Gilbert delta on a sloping basement into standing water, i.e. a condition in which the stratigraphy emplaced by the delta front (the lee face) is entirely stored in the deposit. The migration of the delta front and the deposition on the delta top are modeled with a total and a grain size based mass conservation models. The vertical sorting on the delta front is model

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Viparelli, E., A. Blom, C. Ferrer-Boix, and R. Kuprenas. "Comparison between experimental and numerical stratigraphy emplaced by a prograding delta." Earth Surface Dynamics 2, no. 1 (2014): 323–38. http://dx.doi.org/10.5194/esurf-2-323-2014.

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Abstract. A one-dimensional model that is able to store the stratigraphy emplaced by a prograding delta is validated against experimental results. The laboratory experiment describes the migration of a Gilbert delta on a sloping basement into standing water, i.e., a condition in which the stratigraphy emplaced by the delta front is entirely stored in the deposit. The migration of the delta front and the deposition on the delta top are modeled with total and grain-size-based mass conservation models. The vertical sorting on the delta front is modeled with a lee-face-sorting model as a function

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Jan, Chyan-Deng, Le-Trang Nguyen, and Litan Dey. "Effects of grain size distribution on the movement and deposition of granular materials flowing down an inclined channel." Journal of Mechanics 41 (2025): 157–72. https://doi.org/10.1093/jom/ufaf012.

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Abstract Understanding the movement and deposition patterns of granular materials is important for understanding the landslides and dry granular flow hazards in mountainous regions. This study investigates the influence of grain size distribution, characterized by median grain size (D50) and sorting coefficient (Sc), on the moving and deposit characteristics of dry granular materials using an inclined channel coupled with a horizontal tank. The experiments involved measuring the entry speed (V0), runout distance (LR), maximum width (W) and the final deposit shape profiles under varying channel

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Kakinoki, Tetsuya, Gozo Tsujimoto, and Kohji Uno. "GRAIN-SIZE SORTING IN THE SWASH ZONE ON UNEQUILIBRIUM BEACHES AT THE TIMESCALE OF INDIVIDUAL WAVES." Coastal Engineering Proceedings 1, no. 32 (2011): 27. http://dx.doi.org/10.9753/icce.v32.sediment.27.

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In comparison with hydrodynamics of the swash motion, measurements of sediment load using conventional method can be highly problematic, due to the difficulties, particularly wets and dries, very small water depths, aerated and high velocity, in measurements. For this reason, it is not clear that the sediment transport for each size of particle and sediment sorting in the swash zone. The purpose of this study is to investigate process of grain-size sorting in the swash zone at the time scale of individual waves in laboratory.

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Yang, Jia. "Design and Analysis on Powder Sorting Machine." Advanced Materials Research 479-481 (February 2012): 1041–44. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.1041.

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The powder of different mixed with crushed the grain size. The grading of the rubber powder processing of screening is a process. Plane in the screening of the sieve powder in the process of main problems is sticky sieve. Can not reach the powder screening requirements. The drum sieve first screening fine powder to reduce the adhesion of vibrating sieve plane phenomenon.

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do Prado, Ariel Henrique, David Mair, Philippos Garefalakis, Beatriz C. Silveira, Alexander C. Whittaker, and Fritz Schlunegger. "The influence of grain size sorting on the roughness parametrization of gravel riverbeds." Geomorphology 471 (February 2025): 109565. https://doi.org/10.1016/j.geomorph.2024.109565.

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Jerram, Dougal A. "Visual comparators for degree of grain-size sorting in two and three-dimensions." Computers & Geosciences 27, no. 4 (2001): 485–92. http://dx.doi.org/10.1016/s0098-3004(00)00077-7.

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Mitra, Sachinath, and Syed Samsuddin Ahmed. "Distribution and Textural Characteristics of the Heavy Minerals in the Beach and Dune Sands of Cox's Bazar, Bangladesh." Journal Geological Society of India 36, no. 1 (1990): 54–66. http://dx.doi.org/10.17491/jgsi/1990/360107.

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Abstract The beach and coastal dune sands of Cox's Bazar constitute the most important source of metallic minerals in Bangladesh. The sands are fine, well-sorted, negatively skewed and leptokurtic in their grain-size distributions. Plots of different size parameters suggest that (a) the finer the grain-size the better is the sorting; (b) the sediments are more negatively skewed as the grain-size decreases; and (c) sorting improves as the skewness changes from nearly symmetrical to negative. The dune sands are finer, better sorted and more negatively skewed than beach sands. The percentage of h

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Agusta, V. C., and M. R. Putri. "Grain size trend analysis for sediment characteristic of Cirebon Waters." IOP Conference Series: Earth and Environmental Science 1163, no. 1 (2023): 012016. http://dx.doi.org/10.1088/1755-1315/1163/1/012016.

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Abstract This research aims to understand the sediment characteristic of Cirebon waters using a grain size trend analysis (GSTA). The GSTA can be used to determine sediment physical characteristics and demonstrate the sedimentary processes. A total of 32 seabed surface sediments were analyzed by measuring the size of sedimentary grains using the Mastersizer 2000 instrument and calculating grain size parameters such as mean grain size, sorting, skewness, and kurtosis using geometric methods in the Gradistat program. Analysis of grain size showed that sediments in the Cirebon Waters are dominate

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Ananiadis, G., I. Vakalas, N. Kontopoulos, and A. Zelilidis. "HYDRAULIC AND STATISTICAL GRAIN-SIZE PARAMETERS OF PINDOS TURBIDITE DEPOSITS." Bulletin of the Geological Society of Greece 36, no. 2 (2018): 689. http://dx.doi.org/10.12681/bgsg.16799.

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Final closure of the Pindos ocean, resulted in collision of Apulia with Pelagonian microplates, produced voluminous clastic sediments that flowed southwards as turbidity currents in the form of submarine fans, giving rise to Pindos flysch during early Tertiary. Samples coming from thinbedded sandstones were collected from five cross-sections throughout Pindos flysch in order to determine the characteristics of the turbidity current between different areas. The hydraulic and grainsize statistical parameters showed that low energy turbidity currents deposited the analyzed sediments. Almost all s

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Karditsa, A., and S. E. Poulos. "The application of grain size trend analysis in the fine grained seabed sediment of Alexandroupolis Gulf." Bulletin of the Geological Society of Greece 47, no. 1 (2016): 157. http://dx.doi.org/10.12681/bgsg.10917.

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Grain size trend analysis is a method that determines sediment transport direction, based on the relationship of grain size parameters (mean size, sorting, skewness). The application of the method in the seabed sediments of Alexandroupolis Gulf showed that there are three different sub areas of distinctive sediment movement of bottom sediments (water depths <40 m):(i) the eastern part, which is mainly influenced by the Evros river water/sediment influxes; (ii) the central part that is primarily controlled by the wave activity; and, (iii) the western part that is mainly influenced by the win

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