Science / Tides and Currents / Stilling Well: A vertical pipe with a relatively small opening (intake) in the bottom. It is used in a gauge installation to dampen short period surface waves while freely admitting the tide, other long period waves, and sea level variations; which can then be measured by a water level gauge sensor inside. See float well and protective well.
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Science / Geology / Upwelling: Movement of cold water from the floor of a lake or ocean up into a shallow area. MORE
Science / Geology / Upwelling Current: The upward movement of cold bottom water in the sea, which occurs when wind or currents displace the lighter surface water. MORE