plot_GRDCflags: Plot all GRDC time series with data quality flags
In NaiaraLopezRojo/globalIRmap: What the Package Does (One Line, Title Case)

Description Usage Arguments Details Value

Creates pngs of streamflow time series plots of daily discharge (m^3/s; with flags for 0-flow values and potential outlier) for all GRDC gauges with at least 10 years of data, excluding years with more than 20 days of missing data.

plot_GRDCflags(
  in_GRDCgaugestats,
  yearthresh,
  inp_resdir,
  maxgap,
  showmissing = FALSE
)

`in_GRDCgaugestats`	data.table (or list of data.tables) with time series and intermittency statistics for all GRDC gauging stations.
`yearthresh`	(integer) minimum year from which to plot discharge record.
`inp_resdir`	(character) path to the results directory in which to create folder and write output plots
`maxgap`	(integer) threshold number of missing daily records to consider a calendar year unfit for analysis.
`showmissing`	(logical) whether to show records in years with number of missing daily records beyond `maxgap`.

the output graphs are written into two separate newly created directories in inp_resdir called GRDCir_rawplots_yearthresh_YYYYMMDD and GRDCper_rawplots_yearthresh_YYYYMMDD (e.g., GRDCir_rawplots_1800_20200512 and GRDCper_rawplots_1800_20200512). The first contains plots for non-perennial gauging stations and the second contains plots for perennial gauging stations.

Each plot is generated by plotGRDCtimeseries and shows the time series of daily streamflow values for a station. For the flagging criteria, see documentation for flagGRDCoutliers.

The y-axis is square-root transformed.
Individual points show daily discharge values (in m^3/s).
blue lines link daily values (which may result in unusual patterns due to missing years).
red points are zero-flow flow values.
green points are non-zero flow daily values statistically flagged as potential outliers .
black points are zero-flow values flagged as potential outliers.