Instrument package to monitor sedimentwater interaction on the continental shelf

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Abstract
A need far detailed data on times, rates, and dynamies of sediment transport on the continental shelf has led to development of an instrument paekage (SWISH) whieh monitors sediment—water interaetion for periods of up to 30 days, and at depths to 200 m. The instrument has four sensing units: (a) a current meter to measure eurrent velocity 1 m above the seabed; (b) apressure transdueer to deteet variations in pressure that aecompany the passage of surface waves; (c) an echo sounder which, by directing its transdueer to the sea surfaee, provides arecord of the height and period of tides, swell, and loeal wind waves; and (d) a 16-mm movie camera to record the movement of bedload.

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