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A novel shear vane used to determine the evolution of hydraulic dredge tracks in sub-tidal marine sediments
Hauton, C.; Paterson, D.M. (2003). A novel shear vane used to determine the evolution of hydraulic dredge tracks in sub-tidal marine sediments. Est., Coast. and Shelf Sci. 56(1): 1-8
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, meer
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  • Hauton, C.
  • Paterson, D.M., meer
Abstract
    A novel shear vane is described which can be used to record the shear strength of discrete depth horizons of a variety of marinesediment types in situ. This vane, or modifications of it, has great potential in allowing measurement of in situ shear strength withoutrequiring any samples to be removed from the sea bed, a process which can often destroy th.e fine structure of the sediment. The vanewas used to monitor the change in sediment shear strength caused by a hydraulic dredge, which was used to fish razor clams (Ensisarcuatus) in a sheltered bay within the Clyde Sea area, Scotland. Data collected using this apparatus provided valuable andimmediate information on the stratification of the sea bed post-dredging and allowed the evolution of the dredge track to beregularly monitored by divers over a period of 100 d.
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