ecy.wa.gov

Website:https://ecology.wa.gov/
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Definitions (259)

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orthophoto map


A map made by assembling a number of ORTHOPHOTOGRAPHS into a single, composite picture.
Source: ecy.wa.gov

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bedding plane


A surface parallel to the surface of deposition, which may or may not have a physical expression. The original attitude of a bedding plane should not be assumed to have been horizontal. See also CROSS-BEDDING.
Source: ecy.wa.gov

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nearshore current


The current system caused by WAVE action in and near the BREAKER ZONE, and which consists of four parts: the SHOREWARD MASS TRANSPORT of water; LONGSHORE CURRENTS; RIP CURRENTS; and the LONGSHORE movement of the expanding heads of RIP CURRENTS.
Source: ecy.wa.gov

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ness


Roughly triangular PROMONTORY of land jutting into the SEA, often consisting of mobile material, i.e. a beach form.
Source: ecy.wa.gov

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onshore current


Any current flowing towards the SHORE.
Source: ecy.wa.gov

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allochtonous


A term applied to shelves that presently experience deposition of river-derived SEDIMENTS. See also DETRITUS.
Source: ecy.wa.gov

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controlling depth


The least DEPTH in the navigable parts of a waterway, governing the maximum draft of vessels that can enter.
Source: ecy.wa.gov

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national tidal datum epoch


A period of 19 years adopted by the National Ocean Service as the period over which observations of TIDES are to be taken and reduced to average values for TIDAL DATUMS.
Source: ecy.wa.gov

9

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nautical mile


Also known as geographical mile, its length is 1852 meters (6076.115 feet), approximately 1.15 times as long as the statute mile of 5280 feet.
Source: ecy.wa.gov

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neap high water


See NEAP TIDE.
Source: ecy.wa.gov


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