GROUND WATER - Subsurface water occupying the zone of saturation. In a 

 strict sense, the term is applied only to water below the WATER TABLE. 



GULF - A large embayment in a coast; the entrance is generally wider than 

 the length. 



HABITAT - The place where an organism lives. 



HARBOR (British, HARBOUR) - Any protected water area affording a place of 

 safety for vessels. 



HEAT BONDED - The fabric web is subjected to a relatively high temperature. 

 The filaments are welded together at the contact points. 



HEAT OF HYDRATION - The heat evolved or absorbed when hydration occurs; 



specifically, when water is added to a calcium aluminate powder to produce 

 cement . 



IMPERMEABLE GROIN - A groin through which sand cannot pass. 



INTERLOCKING CONCRETE BLOCK - A cast or machine produced concrete block 

 having interengaging or overlapping edges. 



JETTY - (1) (U.S. usage) On open seacoasts, a structure extending into a 

 body of water, and designed to prevent shoaling of a channel by littoral 

 materials, and to direct and confine the stream or tidal flow. Jetties 

 are built at the mouth of a river or tidal inlet to help deepen and sta- 

 bilize a channel. (2) (British usage) Jetty is synonymous with "wharf" 

 or "pier". 



LARVA - A sexually immature form of any animal unlike its adult form and 

 requiring changes before reaching the basic adult form. 



LITTORAL - Of or pertaining to a shore, especially of the sea. 



LITTORAL DRIFT - The sedimentary material moved in the littoral zone under 

 the influence of waves and currents. 



LITTORAL TRANSPORT - The movement of littoral drift in the littoral zone by 

 waves and currents. Includes movement parallel (longshore transport) and 

 perpendicular (onshore-offshore transport) to the shore. 



LONGSHORE - Parallel to and near the shoreline. 



MONOFILAMENT - A single filament of a manmade fiber, usually of a DENIER 

 higher than 15. 



MULTIFILAMENT - A yarn consisting of many continuous filaments or strands. 



MUD - A fluid-to-plastic mixture of finely divided particles of solid 

 material and water. 



NONWOVEN FABRIC - A textile structure produced by bonding or interlocking 

 of fibers, or both, accomplished by mechanical, chemical or solvent means 

 and combinations thereof excluding woven and knitted fabrics. 



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