A New Video Controlled,Hydraulically Damped Corer for Sediment/Water Interaction Studies |
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| Authors: | Lars Chresten Lund-Hansen Christian Christiansen Mario J C Laima |
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| Institution: | 1. Department of Marine Ecology , Institute of Biological Sciences ?arhus University , ?rhus, Denmark;2. Institute of Geography University of Copenhagen , Copenhagen, Denmark;3. Department of Earth Sciences , Aarhus University , ?rhus, Denmark |
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| Abstract: | Abstract A new box-corer is described. Placement and penetration of the box-corer is video-assisted to secure a sample representative of the bottom. The box itself is constructed of fully transparent polycarbonate which allows for video control observation of the sediment/water interface during sampling. The box is open during the descent towards the seabed but closes when the release is triggered. The box-corer is hydraulically damped so that the box after landing is very gently pushed into the seabed to a predetermined depth. A sediment sample with a total length of about 35 cm and with a surface area of 400 cm2 (20.0x20.0 cm) is collected in the box together with the near bottom water to a height of about 10 cm above the bed. The box-corer height is 180 cm and the total weight about 200 kg. The legs can be dismounted which makes transportation easy. The box-corer has been operated with success both in coarse sand and in soft silt and clay dominated sediments. |
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| Keywords: | sediment sampling fluff-layer box-corer video control |
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