RT - Journal Article
T1 - Developing a Regression Relation for Erosion Rate of Cohesive Sediments Using Experimental Data and Numerical Modeling
JF - JSTNAR
YR - 2015
JO - JSTNAR
VO - 18
IS - 70
UR - http://jstnar.iut.ac.ir/article-1-2945-en.html
SP - 351
EP - 361
K1 - Concentration
K1 - Yielding shear stress
K1 - Non-dimensional parameters
K1 - Flow and sediment parameters
K1 - Exponential formula
AB - Cohesive sediments have large specific surfaces which enable them to absorb other cohesive sediments and polar particles such as mud and sodium. Floccules form by joining these particles. The behavior of cohesive sediments in aquatic environments is completely different from that of granular sediments. Under certain value of shear stress, the structure formed from cohesive sediments is divided into smaller particles, which can be eroded easily. Up to now, researchers have proposed empirical formulas which correlate the rate of erosion to the bed shear stress and the rheological characteristics of cohesive sediments. In this study, the calibration and verification tests are performed on Mike21 software to attain the results more adjusted with the experimental data. Afterwards, the data are developed by the model and converted to the dimensionless form. Finally, an exponential function is proposed for the erosion rate in cohesive sediments. It is found that the coefficient of determination is 0.99
LA eng
UL http://jstnar.iut.ac.ir/article-1-2945-en.html
M3
ER -