✍ Scribed by Prof. Dr. Lars Håkanson
No coin nor oath required. For personal study only.
Comparison of the shear strength a t the surface of underwater sediments provides a simple means of characterizing areas of erosion, transportation and accumulation. A triple cone penetrometer has been developed to obtain relative sediment penetration data, in situ. Following calibration of the instrument on selected samples from lakes and coastal areas,relative data are used to characterize R wide range of bottom types. The cone data are useful in, e.g., contexts of coastal planning and aquatic pollution control, i. e., in matters where sediment distribution maps for entire lakes and coastal areas are requested rather than detailed information from specific sites. The instrument provides rough but objective data on sediment type without samples being taken and laboratory analysis being done. The total weight of the instrument is 7.6 kg, which makes i t easy to operate by hand from a small boat.
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