Showing 201 - 220 results of 240 for search '"silt"', query time: 0.05s Refine Results
  1. 201

    Source distribution, ecological risks, and controlling factors of heavy metals in river sediments: Receptor model-based study in a transboundary river basin by Abu Reza Md Towfiqul Islam, Abu Hena Md Fazla Rabbi, Amit Hasan Anik, Rahat Khan, Md Abdullah Al Masud, Grara Nedjoud, Abubakr M. Idris, Md Naimur Rahman, Venkatramanan Senapathi

    Published 2025-02-01
    “…In this study, ecotoxicological hazards, governing factors, and the distribution of nine HMs (uranium (U), lead (Pb), cadmium (Cd), nickel (Ni), chromium (Cr), manganese (Mn), iron (Fe), zinc (Zn), and copper (Cu)), as well as sediment characteristics (sand, silt, clay, organic matter, and pH) are assessed within the sediment. …”
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  2. 202

    Les aqueducs de Rome : les activités de la Surintendance capitoline, une contribution essentielle à la recherche by Marina Marcelli, Massimiliano Munzi

    Published 2023-12-01
    “…For both the main channel and the adductions, on the other hand, operations were limited to clearing accumulated silt from the abandoned channels along with small restoration activities.…”
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    Article
  3. 203

    Effect of filling materials on reclaimed soil potassium adsorption and desorption in mining area by Kexin JING, Zhoubin DONG, Huaizhi BO, Zhiliang WANG, Shaohao HU, Xinju LI, Xiangyu MIN

    Published 2024-12-01
    “…The adsorption parameters, including maximum adsorption capacity and equilibrium adsorption capacity, of the reclaimed minesoils showed significant correlations with water content, soil texture (silt, sand), cation exchange, and surface characteristics (specific surface area, pore volume, and average pore size). …”
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  4. 204

    Multifractal characteristics of pore structure in the terrestrial shale reservoirs of the Lianggaoshan formation in northeast sichuan basin and its geological significance by Jiping Wang, Jiping Wang, Hongmei Shao, Hongmei Shao, Yuanhao Zhang, Yuanhao Zhang, Zhenxue Jiang, Zhenxue Jiang, Bo Gao, Bo Gao, Lingling Li, Lingling Li, Huifang Pan, Huifang Pan, Haonan Wang, Haonan Wang, Xi Lu, Xi Lu, Hengyuan Qiu, Hengyuan Qiu, Xiaobiao He, Xiaobiao He, Chengju Zhang, Chengju Zhang

    Published 2025-02-01
    “…Lastly, the pore structure of massive fine-silt sandstone exhibits a high degree of complexity and heterogeneity, revealing the significant influence of quartz and clay mineral interactions on pore development. …”
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  5. 205

    Hameaux et villages paysans de la période romaine en plaine d’Alsace by Antonin Nüsslein, Pascal Flotté, Mathias Higelin, Muriel Roth-Zehner

    Published 2020-12-01
    “…Transition sectors were preferred, between very fertile soils (loess and silt) and more alluvial areas, favouring multiple agropastoral activities. …”
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  6. 206

    Improvement and Experimental Study of Loading Mode of Vacuum Preloading Method by WEI Yanbing, LI Zhenxin, LI Yao

    Published 2021-01-01
    “…For the phenomenon of “soil column” occurred in the reinforcement of mud by vacuum preloading method,in order to improve the reinforcement effect of vacuum preloading this paper summarizes and analyzes the formation mechanism of “soil column” for coming to the conclusion that the main reason for the formation of “soil column” is the silting of drainage board,proposes the method of step vacuum loading,concludes that the strength of reinforced soil increases largely under the step vacuum loading method after analysis of the theory of soil mechanics,and verifies it through the indoor model test.The results show that the permeability coefficient of the plastic drainage board decreases slightly and the consolidation settlement value of the reinforced mud is larger under the step vacuum loading,indicating that the step vacuum loading method can reduce the silting of drainage boards,delay the occurrence of “soil column” phenomenon,and improve the overall reinforcement effect of mud.…”
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  7. 207

    Study on the Solution of Sand Slabbing in the Tailing Sand Bin of Huanggang Iron Ore Mine by Xin Zhu, Bokun Zheng, Liang Peng, Fengfeng Wu, Xuyan Yin, Yang Liu, Xin Yang

    Published 2022-01-01
    “…In order to improve the tailings utilization rate and realize full tailings’ filling in Huanggang iron mine in Inner Mongolia, a flocculation settlement system was added, which resulted in silting and consolidation of tailings in sand silts. …”
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  8. 208

    Numerical Simulation of the Effect of Long-Term Reclamation on the Flow and Sediment Concentration in Binhai Port,Yancheng by ZHU Siyu, LU Dan

    Published 2021-01-01
    “…Binhai Port is located at the most obvious corrosive coastline of the abandoned Yellow River delta in the north of Jiangsu Province,where the near-shore wave and flow dynamic is strong,the sediment movement is relatively active,the underwater terrain is complex and the slope erosion is obvious.Based on the measured hydrological and sediment data and a two-dimensional mathematical model for wave,tidal current and sediment,this paper quantitatively analyzes the influence of the long-term reclamation project on the flow and sediment concentration in the study area and the surrounding estuary,and emphatically discusses the back silting characteristics and deposition causes of the 300 000-ton channel during normal and rough weather.The results show that:After the implementation of the reclamation project,the flow and sediment characteristics of the study area don't change in a large scale,and mainly the flow and sediment near the project site is affected.The sediment is deposited after the channel dredging and a sediment deposit centered at the area with peak sediment concentration is formed in the channel,with decreasing deposition thickness to the port and outer sea channel.During rough weather,the maximum deposition thickness can reach 8~24 times of that in normal weather,but it is less than 0.2 m/d and there is no sudden silting and navigation blocking.…”
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  9. 209

    Une approche d’ingénierie cognitive pour la gestion intégrée de zones côtières : le cas d’un barrage sur un estuaire. by Caroline Blanche, Evelyne Goubert, Thierry Morineau

    Published 2006-12-01
    “…Since the building of a dam, this territory decreases as the function of the silting up, increasing the risk of use conflicts. …”
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  10. 210

    When are the classes of Gorenstein modules (co)tilting? by Wang, Junpeng, Liu, Zhongkui, Zhao, Renyu

    Published 2024-11-01
    “…The first is to obtain the coincidence between the 1-tilting and silting property, as well as the 1-cotilting and cosilting property of such classes respectively. …”
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  11. 211

    Numerical Simulation of Hydrodynamic Characteristics of YuanyangIsland in Liao River Estuary Based on FVCOM by LI Jin, XU Tianping, ZHANG Mingliang

    Published 2020-01-01
    “…The simulated flow fields reveal the complex flow conditions of Yuanyang Island in Liao River Estuary, which provides a reference for further study of salinity distribution, sediment scouring and silting, and pollutant transport in estuarine wetland.…”
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  12. 212

    Climate Change and Rural Development in the Middle Atlas Mountains and Fringe Areas (Morocco) by Moulay-Driss El Jihad

    Published 2016-10-01
    “…Until the 1990s, rural development policies were based on the fight against forest degradation and soil erosion, first and foremost with a view to reducing dam silting. Since the early 2000s, efforts have focused on direct contact with the population in order to meet their needs. …”
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  13. 213

    An EVP Double-Yield Nonstationary Flow Surface Model for Soft Clay by Liucheng Chang, Hongyu Wang, Ya Wang

    Published 2022-01-01
    “…Different types of soft clay, such as Tianjin Coastal clay, Shantou dredger fill, and silted soil in front of dam, were tested to verify the accuracy of the constructed model. …”
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  14. 214

    Study of structural stability of a concrete gravity dam using a reliability approach� by Mohamed Essaddik Kerkar, Mustapha Kamel Mihoubi

    Published 2022-07-01
    “…This investigation is to establish a methodology in order to optimize the safety of a concrete gravity dam in operation by carrying out a risk analysis which includes the identification of the sources of danger in terms of scenarios that can occur due to a failure on the dam-reservoir system on an implication of natural hazards (floods, earthquakes) and technical accidents such as malfunction of a spillway gate, drain valve, drainage system or important silting. Reliability methods provide a basis for the probabilistic assessment of the structural safety of a dam. …”
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  15. 215

    Changement climatique et développement rural dans les montagnes du Moyen-Atlas et leurs bordures (Maroc) by Moulay-Driss El Jihad

    Published 2016-10-01
    “…Until the 1990s, rural development policies were based on the fight against forest degradation and soil erosion, first and foremost with a view to reducing dam silting. Since the early 2000s, efforts have focused on direct contact with the population in order to meet their needs. …”
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    Article
  16. 216

    Aplicação do Processo Hierárquico Analítico (AHP) para o Mapeamento de Suscetibilidade ao Voçorocamento no município de Capão do Cipó – RS/Brasil by Antônio Von Ende Dotto, Marinéli Moraes Gaberti, Luís Eduardo de Souza Robaina

    Published 2023-10-01
    “…Erosion has been highlighted in scientific works due to growing concerns about the loss of arable land, soil degradation and silting up of river channels. The present work presents the Mapping of Susceptibility to gullies in the municipality of Capão do Cipó from multicriteria analysis with the Analytical Hierarchical Process (AHP) technique and support of geotechnologies. …”
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  17. 217

    Geological Modeling of the Senonian Aquifer in the Oued Guir Watershed (Southeast Morocco) by Messaoudi Badre, Kabiri Lahcen, El Ouali Mohamed, Ait Lahssaine Ismail, Kadiri Abdelhakim, Essafraoui Badre

    Published 2025-01-01
    “…The facies change between clays, silts, and sands, while the thickness exceeds 650 meters. …”
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    Article
  18. 218

    Introduction of a siphon pump for large-scale irrigation in East Belesa district, Ethiopia by Atikilt Abera Alemayehu, Melkie Desalegn, Melaku Hunie

    Published 2024-12-01
    “…However, the dam was not functional for a long time due to the silting of the bottom sediment and water outlets. …”
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  19. 219

    Hydrodynamic Characteristics and Riverbed Evolution Analysis of the Bazizui Straight Branching Channel in Xinjiang River Based on MIKE21 by HU Kelong, JI Yong, CEN Yixing, ZHONG Heye, ZHANG Yue, ZHANG Lichen, WANG Yin, ZHANG Jie

    Published 2023-01-01
    “…To clarify the hydrodynamic characteristics and riverbed evolution trend of the branching channel bank in the Bazizui shipping section of Xinjiang River,this paper builds the two-dimensional mathematical model of the research water area by MIKE21 hydrodynamic module.It employs the hydrological data of Meigang Station to calibrate the model and verify the accuracy.On this basis,the hydrodynamic characteristics in different hydrological periods of the straight branching channel of Xinjiang River are analyzed,and the evolution trend of the branching channel section is clarified.The results show that the left branch is the main water branch,and the diversion ratio of the diversion channel decreases with the increase in flow.The velocity of flow is irregularly distributed and varies significantly between regions.The main stream appears in the left branch of the diversion section,and the maximum flow velocity is confirmed in the narrow part.The water level decreases uniformly from the diverging area to the confluence area.The overall stability of river pattern development and evolution is good,and the evolution of the water channel is mainly reflected in the local changes of riverbed scouring and silting in branching channels.The model can effectively simulate the diversion ratio and water level variation of the branching channel,which can provide a scientific basis for the study of river safety protection and navigation stability.…”
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  20. 220

    Analysis of Channel Evolution and Its Influence of Xunwu River in Source Area of Dongjiang River Based on GIS Technology by CHEN Chuan, ZENG Jinfeng

    Published 2021-01-01
    “…Based on the measured data of large fixed sections at Shuibei Hydrological Station from 2010 to 2020 and the underwater topographic survey data near Shuibei Hydrological Station,this paper constructs a topographic database of underwater sections and a three-dimensional underwater topographic model near Shuibei Hydrological Station for riverbed change analysis by using GIS technology,analyzes the channel scouring and silting in single Shuibei Station section of the main stream of Xunwu River in terms of temporal and spatial change,and discusses the influencing factors and the influence of the changes.The results show that:GIS technology is an effective method to study the changes of river topography.The average annual river-bed elevation of Shuibei Station section of the main stream of Xunwu River decreased by 0.75 m from 2010 to 2015,and by 0.52 m from 2015 to 2020.With the scouring of the main channel terrain during 2010—2020,the average undercut depth is 1.27 m.The main factors for the topographic change of the river channel in this section are the sand restraining of power plants,the sand mining of river channels and the comprehensive treatment of abandoned mines.The annual undercut of river channels will increase the storage capacity of river channels and increase the reverberation time of pollutants in the downstream channels,thus worsening the water quality.In a worse case,the severe evolution of riverbed may cause the dangerous situation of the bridge across the river and even the hollowing out or collapse of embankment.…”
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