Explanations

left top: value of characteristic number for a single event.
left bottom: mean value of the characteristic number within the period of data analysis.
right top: maximum value of the characteristic number within the period of data analysis.
right bottom: minimum value of the characteristic number within the period of data analysis.

Examples

maximum flood current:maximum ebb current	maximum flood current:maximum ebb current (maximum)

maximum flood current:maximum ebb current (mean value)	maximum flood current:maximum ebb current (minimum)