Characteristic Numbers of Current Velocity (independent of tides)
From BAWiki
Motivation
Calculation and graphic display of several tide-independent characteristic numbers of current velocity can yield additional insight into velocity related phenomena of natural coastal and/or inland waters. In contrast to the computation of the tidal characteristic numbers of salinity the tide-independent numbers can be preferable used for
- natural waters which are not dominated by the tides, e.g. like the coastal waters and estuaries along the Baltic Sea coast of Germany, or in
- determination of characteristic values of current velocity for an arbitrary long (or short) period of time.
In particular there are several useful applications possible for this type of data analysis, for example:
- From the computed times for the duration of high current velocity and the duration of low current velocity one can draw conclusions with respect to the impact of current velocity on organisms living in the water or along the beaches.
An automatic analysis of all Characteristic Numbers of Current Velocity Data is carried through by the computer program LZKVF.
Definitions for the Characteristic Numbers
Maximum Current Velocity
highest value of current velocity within the period of data analysis
Example: Maximum Current Velocity in the Greifswalder Bodden
Duration of Low Current Velocity
period of the time during which local current velocity lies below a given thershold
Example: Duration of Low Current Velocity in the Greifswalder Bodden
Duration of High Current Velocity
period of the time during which local current velocity lies above a given thershold
Example: Duration of High Current Velocity in the Greifswalder Bodden
Frequency Distribution of Current Velocity
frequency distribution of local current velocity within arbitrary given intervals and sectors of current direction
Example: Frequency Distribution of Current Velocity in the Greifswalder Bodden
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