Erosion rate of sand and mud mixtures |
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| Institution: | 1. Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY, 13699, USA;2. Coastal and Hydraulics Laboratory, US Army Corps of Engineers, Vicksburg, MS, 39180, USA;1. Department of Dams and Water Resources, College of Engineering, University of Mosul, Mosul, Iraq;2. Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang, Selangor, 43400, Malaysia;3. Department of Water Resources Engineering, University of Baghdad, Baghdad, Iraq;1. Department of Water Engineering, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran;2. Agricultural Engineering Research Institute (AERI), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran;3. Department of Water Engineering, College of Agriculture, Isfahan University of Technology, Isfahan, Iran;1. Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;3. School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;4. Tsinghua University, Beijing 100084, China;1. Department of Civil & Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bandar Baru Bangi, 43600, Malaysia;2. School of Civil and Environmental Engineering, College of Engineering, Nanyang Technical University, 50 Nanyang Avenue, 639798, Singapore;1. Faculty of Agriculture, University of Novi Sad, Trg D.Obradovica 8, 21000 Novi Sad, Serbia;2. Faculty of Agriculture, University of Zagreb, Svetosimunska cesta 25, 10000 Zagreb, Croatia;3. Faculty of Forestry, University of Belgrade, Kneza Viseslava 1, 11000 Belgrade, Serbia;4. Faculty of Agricultural Sciences and Food, Ss. Cyril and Methodius University in Skopje, Blvd. Aleksandar Makedonski bb, 1000 Skopje, Macedonia |
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| Abstract: | Erosion of mixed cohesive and noncohesive sediments is studied using the erosion test instrument SEDFlume. The sediment mixtures are composed of well-sorted quartz sand (0.25–0.5 mm) and one of the three used muds: kaolinite, kaolinite-bentonite and Mississippi River muds. The mud contents cover from 0 to 100%. The measured data of erosion rate and bed shear stress are used to examine the segmented linear, nonlinear, and exponential erosion models. The parameters of each erosion model are related to the physical properties of sediment mixtures, including clay fraction, mud fraction, mixture dry density, and mud dry density. It is found that the three models can fit well with the data, and their parameters have strong relations with the mud fraction and mud dry density, to a less extent with the clay fraction, but not with the mixture dry density. |
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| Keywords: | Cohesive sediments Noncohesive sediments Sand and mud mixtures Segmented linear model Nonlinear model Exponential model |
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