TidalCharacteristics: Calculate tidal characteristics

In Tides: Quasi-Periodic Time Series Characteristics

Calculate tidal characteristics

Description

Calculates the characteristics of observed tidal water levels. Wrapper of the functions extrema, IT and IF. Also works on time series with gaps.

Usage

TidalCharacteristics(
  h,
  h0 = h$h0,
  T2 = 5 * 60 * 60,
  hoffset = 0,
  filtconst = 1,
  dtMax = 15,
  unit = "mins",
  Tavg = 12.4 * 60,
  removegaps = c("All", "Split", "None")
)

Arguments

h	Water level time series. data frame with time and h column
h0	Reference level, either single valued or vector with dimension corresponding to h
T2	'Lower' bound on half the quasi period, but higher than expected stagnant phase; default = 5h
hoffset	Offset level, to prevent spurious maxima generation due to small fluctuations
filtconst	Filtering constant for smoothing the time series
dtMax	Maximum accepted time interval in a continuous series. Bigger time intervals are considered to be gaps
unit	Unit of dtMax, Tavg
Tavg	Average period of time series
removegaps	Method to remove gaps in time series from inundation times and dry times. See RemoveGaps

Value

An object of class Tides, i.e. a list containing:

HL	Data frame with extrema
h	original water level data frame with additional attributes
gaps	a data frame containing start and end times of gaps in the series
IF	inundation frequency of the reference level
ITs	inundation times at the reference level
DTs	dry times at the reference level
h0	reference level
N	Total number of cycles in time span

Author(s)

Tom Cox <[e-mail]>, Lennert Schepers <[e-mail]>

See Also

extrema, IT, plot.Tides

Examples

TC <- TidalCharacteristics(waterlevels, filtconst=10,hoffset=1)
 TC
 plot(TC)
 summary(TC)

Tides documentation built on July 21, 2026, 9:08 a.m.