Author(s): J. Aberle; V. Nikora; R. Walters
Linked Author(s):
Keywords: Cohesive sediments; Critical bed shear stresses; Bed erosion; In situ flume
Abstract: A straight benthic in situ flume was used to measure erosion rates of cohesive sediments in different aquatic environments in New Zealand. The data show an exponential decay of erosion rate with time, which is indicative of depth-limited erosion. Two approaches for the calibration of a linear erosion formula are used both leading to similar results. The data show the dependency of erosion rate on sand content and highlight differences of erosion processes in freshwater and saltwater environments. Also shown is a requirement for direct measurements of bed density profiles and bed load transport during in situ investigations.
Year: 2003