EM 1110-2-1100 (Change 1)
31 Jul 03
The parts of a waterway that are open and unobstructed for navigation. The main traveled part of a waterway; a
The frequency band (nominally 0.001 - 0.02 Hz) occupied by SHEAR INSTABILITIES of the longshore current.
This band falls both below and in the lower part of the Infragravity band occupied by Infragravity waves.
A unit of measurement used for soundings equal to 1.83 meters (6 feet).
The copyrighted trademark for a type of ECHO SOUNDER.
A fracture in rock along which there has been an observable amount of displacement. Faults are rarely single planar
units; normally they occur as parallel to sub-parallel sets of planes along which movement has taken place to a greater or
lesser extent. Such sets are called fault or fracture-zones.
The entire group of animals found in an area.
An artificially widened beach serving to nourish downdrift beaches by natural littoral currents or forces.
The currents which flow parallel to shore before converging and forming the neck of a RIP CURRENT.
See CURRENT, FEEDER.
The initial action of a deepwater wave, in response to the bottom, upon running into shoal water.
The area in which SEAS are generated by a wind having a fairly constant direction and speed. Sometimes used
synonymously with FETCH LENGTH. Also GENERATING AREA.
The horizontal distance (in the direction of the wind) over which a wind generates seas or creates a WIND SETUP.
Situation in which wave energy (or wave height) is limited by the size of the wave generation area (fetch).
Intermediate layer, preventing fine materials of an underlayer from being washed through the voids of an upper
A narrow, deep, steep-walled inlet of the sea, usually formed by entrance of the sea into a deep glacial trough.
Appendix A Glossary of Coastal Terminology