IN-SITU DETERMINATION OF THE CRITICAL BED-SHEAR STRESS FOR EROSION OF COHESIVE SEDIMENTS

Proceedings of the International Conference on Coastal Engineering

Erik-Jan Houwing¹  Leo C. van Rijn¹ 

[1] Institute for Marine and Atmospheric Research Utrecht, Utrecht University

关键词: cohesive sediment;    in situ;    bed;    bed stress;    shear stress;    erosion;   

DOI  :  10.9753/icce.v24.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A new in-situ erosion meter has been developed to measure the in-situ bedshear strength of cohesive beds. It is assumed that the current velocity, at initiation of motion of the toplayer of the bed, can be used to compute the critical bed-shear stress. This critical shear stress is the characteristic parameter which can define different types of sediment beds. The in-situ measurements show that the test results are determined by the prevailing hydrodynamic conditions in the field (wave activity) and recent depositions rather than by physical and biological parameters.

【 授权许可】

Unknown