EM 1110-2-1100 (Change 1)
31 Jul 03
TIDAL DELTA
See DELTA.
TIDAL FLATS
(1) Marshy or muddy areas covered and uncovered by the rise and fall of the tide. A TIDAL MARSH. (2) Marshy
or muddy areas of the seabed which are covered and uncovered by the rise and fall of tidal water.
TIDAL INLET
(1) A natural inlet maintained by tidal flow. (2) Loosely, any inlet in which the tide ebbs and flows. Also TIDAL
OUTLET.
TIDAL MARSH
Same as TIDAL FLATS.
TIDAL PERIOD
The interval of time between two consecutive, like phases of the TIDE. (See Figure II-5-16.)
TIDAL POOL
A pool of water remaining on a beach or reef after recession of the TIDE.
TIDAL PRISM
(1) The total amount of water that flows into a harbor or out again with movement of the tide, excluding any fresh
water flow. (2) The volume of water present between MEAN LOW and MEAN HIGH TIDE.
TIDAL RANGE
The difference in height between consecutive high and low (or HIGHER HIGH and LOWER LOW) waters. (See
Figure II-5-16.)
TIDAL RISE
The height of tide as referred to the datum of a chart. (See Figure II-5-16.)
TIDAL RIVER
That part of a river where the water level is influenced by the tide.
TIDAL SHOALS
Shoals that accumulate near inlets due to the transport of sediments by tidal currents associated with the INLET.
TIDAL STAND
An interval at high or low water when there is no observable change in the height of the tide. The water level is
stationary at high and low water for only an instant, but the change in level near these times is so slow that it is not usually
perceptible.
TIDAL WAVE
(1) The wave motion of the tides. (2) In popular usage, any unusually high and destructive water level along a
shore, usually referring to STORM SURGE or TSUNAMI, which are not tidal phenomena at all.
TIDALLY DRIVEN CIRCULATION
The movement of fresh water and seawater that are mixed by the sloshing back and forth of the ESTUARY in
response to ocean tides.
Appendix A Glossary of Coastal Terminology
A-81
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