EM 1110-2-1100 (Change 1)
31 Jul 03
TIDELANDS
The zone between the MEAN HIGH WATER line and the MEAN LOW WATER line, commonly referred to as the
BEACH. Waters above the tidelands are inland, being landward of the COAST LINE.
TIDES, RIP
See RIP.
TOE
Lowest part of sea- and portside BREAKWATER slope, generally forming the transition to the seabed..
TOMBOLO
A bar or spit that connects an island to the mainland or to another island. See CUSPATE SPIT. (See Figure IV-1-
6.). Also applied to sand accumulation between land and a DETACHED BREAKWATER.
TONGUE
A long narrow strip of land, projecting into a body of water.
TOPOGRAPHIC MAP
A map on which elevations are shown by means of contour lines.
TOPOGRAPHY
The configuration of a surface, including its relief and the positions of its streams, roads, building, etc.
TRAINING WALL
A wall or jetty to direct current flow.
TRANSGRESSION, MARINE
The invasion of a large area of land by the sea in a relatively short space of time (geologically speaking). Although
the observable result of a marine transgression may suggest an almost `instantaneous' process, it is probable that the time
taken is in reality is thousands or millions of years. The plane of marine transgression is a plane of UNCONFORMITY.
TRANSITIONAL ZONE (TRANSITIONAL WATER)
In regard to progressive gravity waves, water whose depth is less than but more than 1/25 the wavelength. Often
called shallow water.
TRANSLATORY WAVE
See WAVE OF TRANSLATION.
TRANSPOSED HURRICANE
See HYPOTHETICAL HURRICANE.
TRANSVERSE BAR
A bar which extends approximately right angles to shorelines.
TRANSVERSE WAVE
Waves that propagate along a sailing line of a vessel. (See Figure II-7-40)
TRENCH
A long narrow submarine depression with relatively steep sides.
Appendix A Glossary of Coastal Terminology
A-83
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