EA: SOUNDING_DATUM_TYPE
EE: LOW_WATER
Status:
STD 2005/06/07
Code:
19
EA label:
SOUNDING_DATUM_TYPE
Concept definition:
An approximation of <<<
MEAN_LOW_WATER
>>> adopted as the reference level for a limited <
REGION
>, irrespective of better determinations later. Used mostly in <
HARBOUR
> and river engineering. Used in <
INLAND_WATER
>s. It is generally defined as a level which the daily mean water level would fall below less than 5 percent of the time and by no more than 0,2 metres during the navigation season. A single level <
SURFACE
> is usually chosen as the low water <
DATUM
> for a whole <
LAKE
>. On a <
RIVER
>, low water <
DATUM
> is a sloping <
SURFACE
>, which approximates the <
WATERBODY_SURFACE
> of the <
RIVER
> at a low state.
Reference type:
PR
Reference:
[
S57A
, Attribute, VERDAT:13]
Supplemental references:
[
TCG
, "low water datum (LWD)", (2)]
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