runSeries: Annual series of flow-normalized concentration and...

In USGS-R/EGRET: Exploration and Graphics for RivEr Trends

Annual series of flow-normalized concentration and flow-normalized flux

Description

runSeries provides annual series of flow-normalized concentration and flow-normalized flux for the water quality record. Computations could involve the use of the "wall" and/or use of "generalized flow normalization". These two concepts are described in detail in the vignette: vignette("Enhancements", package = "EGRET").

Usage

runSeries(eList, windowSide, surfaceStart = NA, surfaceEnd = NA,
  flowBreak = FALSE, Q1EndDate = NA, QStartDate = NA, QEndDate = NA,
  wall = FALSE, oldSurface = FALSE, sample1EndDate = NA,
  sampleStartDate = NA, sampleEndDate = NA, paStart = NA, paLong = NA,
  fractMin = 0.75, minNumObs = 100, minNumUncen = 50, windowY = 7,
  windowQ = 2, windowS = 0.5, edgeAdjust = TRUE, verbose = TRUE)

Arguments

eList	named list with at least the Daily, Sample, and INFO dataframes
windowSide	integer. The width of the flow normalization window on each side of the year being estimated. A common value is 11, but no default is specified. If stationary flow normalization is to be used, then windowSide = 0 (this means that flow-normalization period for all years is the same).
surfaceStart	The Date (or character in YYYY-MM-DD) that is the start of the WRTDS model to be estimated and the first of the daily outputs to be generated. Default is NA, which means that the surfaceStart is based on the date of the first sample.
surfaceEnd	The Date (or character in YYYY-MM-DD) that is the end of the WRTDS model to be estimated and the last of the daily outputs to be generated. Default is NA, which means that the surfaceEnd is based on the date of the last sample.
flowBreak	logical, is there an abrupt break in the discharge record, default is FALSE.
Q1EndDate	The Date (as character in YYYY-MM-DD format) which is the last day, just before the flowBreak. Required if flowBreak = TRUE.
QStartDate	The first Date (as character in YYYY-MM-DD format) used in the flow normalization. Default is NA, which makes the QStartDate become the first Date in eList$Daily.
QEndDate	The last Date (as character in YYYY-MM-DD format) used in the flow normalization. Default is NA, which makes the QEndDate become the last Date in eList$Daily.
wall	logical. Whether there is an abrupt break in the concentration versus discharge relationship due to some major change in pollution control or water management. Default is FALSE.
oldSurface	logical, if TRUE, use surface previously estimated using modelEstimation. Default is FALSE.
sample1EndDate	The Date (as character in YYYY-MM-DD format) of the last day just before the wall. Default = NA. A date must be specified if wall = TRUE.
sampleStartDate	The Date (as character in YYYY-MM-DD format) of the first sample to be used. Default is NA which sets it to the first Date in eList$Sample.
sampleEndDate	The Date (as character in YYYY-MM-DD format) of the last sample to be used. Default is NA which sets it to the last Date in eList$Sample.
paStart	numeric integer specifying the starting month for the period of analysis, 1<=paStart<=12. Default is NA, which will use the paStart in the eList$INFO data frame. See also setPA.
paLong	numeric integer specifying the length of the period of analysis, in months, 1<=paLong<=12. Default is NA, which will use the paLong in the eList$INFO data frame. See also setPA.
fractMin	numeric specifying the minimum fraction of the observations required to run the weighted regression, default is 0.75. The minimum number will be the maximum of minNumObs and fractMin multiplied by total number of observations.
minNumObs	numeric specifying the miniumum number of observations required to run the weighted regression, default is 100
minNumUncen	numeric specifying the minimum number of uncensored observations to run the weighted regression, default is 50
windowY	numeric specifying the half-window width in the time dimension, in units of years, default is 7
windowQ	numeric specifying the half-window width in the discharge dimension, units are natural log units, default is 2
windowS	numeric specifying the half-window with in the seasonal dimension, in units of years, default is 0.5
edgeAdjust	logical specifying whether to use the modified method for calculating the windows at the edge of the record. The edgeAdjust method tends to reduce curvature near the start and end of record. Default is TRUE.
verbose	logical specifying whether to output status messages.

Details

When using generalized flow-normalization, it is best to have the Daily data frame extend well beyond the years that are in the Sample data frame. Ideally, the Daily data frame would start windowSide years before the start of the Sample data set, if the data exist to provide for that. Generally that isn't possible for the end of the record because the Sample data may end very close to the present. To the extent that is possible therefore, it is better to include more discharge data after the end of the Sample record. Also note that in the case run in the examples don't do that, because the data set needs to be appropriate for stationary flow normalization as well (and package size considerations make it difficult to include specialized examples).

Value

eList named list with INFO, Daily, and Sample dataframes, along with the surfaces matrix.

Examples

eList <- Choptank_eList


# Automatic calculations based on windowSide = 11
# four possible ways to do generalized flow normalization

#Option 1:  Use all years for flow normalization.
seriesOut_1 <- runSeries(eList,  windowSide = 0)
plotConcHist(seriesOut_1)
plotFluxHist(seriesOut_1)

# Option 2: Use sliding window throughout the whole flow normalization process.
#                In each case it is a 15 year window (23 = 1 + 2*11)
seriesOut_2 <- runSeries(eList, windowSide = 11)

plotConcHist(seriesOut_2)
plotFluxHist(seriesOut_2)

# Option 3: Flow normalization is based on splitting the flow record at 1990-09-30
#                But in years before the break it uses all flow data from before the break, 
#                and years after the break uses all flow data after the break
seriesOut_3 <- runSeries(eList,
                       windowSide = 0, 
                       flowBreak = TRUE,
                       Q1EndDate = "1990-09-30")
                       
plotConcHist(seriesOut_3)
plotFluxHist(seriesOut_3)

# Option 4: Flow normalization is based on splitting the flow record at 1990-09-30
#                but before the break uses a 23 year window of years before the break
#                after the break uses a 23 year window of years after the break
seriesOut_4 <- runSeries(eList, 
                      windowSide = 11, flowBreak = TRUE,
                      Q1EndDate = "1990-09-30")
                      
plotConcHist(seriesOut_4)
plotFluxHist(seriesOut_4)

USGS-R/EGRET documentation built on Nov. 20, 2024, 7:45 p.m.