セクションアウトライン

    • ・cylindrical dredge

      　A cylindrical dredge is simply a metal cylinder and is a very simple sampler. The dredge collects sediments by scooping them up on the seafloor. Once the dredge is lowered to the seafloor, it is towed to the surface to scoop out the surface sediment. Since this is a simple dredge, the sediment layer will be agitated during collection, and some of the sample will be washed off during retrieval to the vessel. Benthic organisms can be collected even in rough sandy soil.

      円筒ドレッジ

      　　　　　　　　　　　　　Fig 12　Cylindrical dredge