Measuring Bed Exchange Properties of Cohesive Sediments Using Tripod Data

Measuring Bed Exchange Properties of Cohesive Sediments Using Tripod Data

Zhou, Z. (TU Delft Coastal Engineering; East China Normal University)
Ge, Jianzhong (Shanghai Estuarine and Coastal Science Research Center; Institute of Eco-Chongming (IEC); East China Normal University)
van Maren, D.S. (TU Delft Environmental Fluid Mechanics; East China Normal University; Deltares)
Gu, Jinghua (East China Normal University)
Ding, Pingxing (East China Normal University)
Wang, Zhengbing (TU Delft Coastal Engineering; Deltares)

2022

The Krone–Partheniades (K-P) framework has been used for decades to quantify and analyze the sediment exchange at a water–bed interface. Measuring the erosion and deposition parameters that are part of this framework requires time-consuming field observations. Additionally, the erosion parameters are measured independently of deposition parameters, while in reality they are coupled. In numerical models applying the K-P framework these parameters are often assumed to be constant in time and mutually independent. In this study, we develop a relatively simple methodology to determine the erosion and deposition parameters, using conventional near-bed observations of bed level, sediment concentration and flow velocity. This methodology is subsequently applied to tripod observations collected in the Changjiang estuary, China, to compute continuous time-varying erosion and settling parameters. We propose a diagram to visualize the interdependency and accuracy of erosion and deposition parameters, which is the input for K-P framework models requiring this interdependency

Krone–Partheniades equations
observations techniques
settling velocity
critical shear stress

http://resolver.tudelft.nl/uuid:17487f41-b96a-4063-a64f-9760ff465c17

10.3390/ jmse10111713

2077-1312

Journal of Marine Science and Engineering, 10 (11)

Institutional Repository

journal article

© 2022 Z. Zhou, Jianzhong Ge, D.S. van Maren, Jinghua Gu, Pingxing Ding, Zhengbing Wang