EM 1110-2-1100 (Change 1)
31 Jul 03
Usage note: CAPITALIZATION within a definition indicates that the term is defined elsewhere in the
glossary. Figure numbers refer to the main text of the Coastal Engineering Manual.
The mechanical wearing away by rock material transported by wind or water
A rock or clay platform which has been worn by the processes of abrasion.
May be either natural or artificial. Natural accretion is the buildup of land, solely by the action of the forces of
nature, on a beach by deposition of water- or airborne material. Artificial accretion is a similar buildup of land by reason of
an act of man, such as the accretion formed by a GROIN, BREAKWATER, or beach fill deposited by mechanical means.
A margin of a continental plate consisting of a continental shelf and slope, and an oceanic trench or basin.
A GROIN whose permeability can be changed, usually with gates or removable sections.
ADVANCE (of a beach)
(1) A continuing seaward movement of the shoreline. (2) A net seaward movement of the shoreline over a specified
time. Also PROGRESSION.
Changes in a sea water property (salinity, temperature, oxygen content, etc.) that take place in the presence of
currents. Also, changes in atmospheric properties in the earth's atmosphere.
The ratio of wave velocity to wind velocity (in wave forecasting theory).
The course along which the center line of a channel, canal or drain is located.
Detrital material which is transported by a river and deposited usually temporarily at points along the flood plain
of a river. Commonly composed of sands and gravels.
A plain bordering a river, formed by the deposition of material eroded from areas of higher elevation.
Soil (sand, mud, or similar detrital material) deposited by streams, or the deposits formed.
Appendix A Glossary of Coastal Terminology