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EGRET (version 2.3.0)

Exploration and Graphics for RivEr Trends (EGRET)

Description

Statistics and graphics for streamflow history, water quality trends, and the statistical modeling algorithm: Weighted Regressions on Time, Discharge, and Season (WRTDS).

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Install

install.packages('EGRET')

Monthly Downloads

815

Version

2.3.0

License

CC0

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Repository

https://github.com/USGS-R/EGRET/wiki

Homepage

http://pubs.usgs.gov/tm/04/a10/

Maintainer

Laura DeCicco

Last Published

July 7th, 2015

Functions in EGRET (2.3.0)

Plot of Observed Concentration versus Discharge

Sets up tick marks for an axis with a log scale, where the graph is small

Deletes the computed values during periods of time when there is no sample data

Compute the flux bias statistic: (mean of estimated flux - mean of observed flux) / mean of observed flux

Graph of annual flux and flow normalized flux versus year

modelEstimation

Estimation process for the WRTDS (Weighted Regressions on Time, Discharge, and Season)

Import user daily data for EGRET analysis

Makes 15 graphs of streamflow statistics on a single page

plotConcTimeSmooth

Plot up to three curves representing the concentration versus time relationship, each curve representing a different flow.

Populate Daily data frame

Compute the 6 parameters needed to lay out the grid for the surfaces computed in estSurfaces

Creates a subset data frame that only contains data for the specified period of analysis

Create named list for EGRET analysis

formatCheckDate

formatCheckDate

censoredSegments

Generic plotting function to create censored line segments

Get INFO dataframe from EGRET object

makeAnnualSeries

Produces annual series of 8 streamflow statistics (and a lowess smooth of them) from daily streamflow data

Axis generation for log discharge

Jack-Knife cross validation of the WRTDS (Weighted Regressions on Time, Discharge, and Season)

Graph of observed versus estimated flux

calculateMonthlyResults

Calculates monthly values of Q, Conc, Flux, FNConc, and FNFlux for the entire record

formatCheckParameterCd

formatCheckParameterCd

plotConcTimeDaily

Plot of the time series of daily concentration estimates and the sample values for the days that were sampled

Sets up tick marks for an axis with a log scale

multiPlotDataOverview

Produces a 4 panel plot that gives an overview of the data set prior to any processing

EGRET package includes WRTDS and flowHistory

plotConcQSmooth

Plot up to three curves representing the concentration versus discharge relationship. Each curve is a different point in time.

Makes four graphs of streamflow statistics on a single page

populateDateColumns

Populate Date Columns

Box plot of the water quality data by month

Flexible Flow Normalization

Import metadata to create INFO data frame

dateFormatCheck

Check date format

Constants included with EGRET

Print annual results for a given streamflow statistic

Update Sample dataframe

Color contour plot of the estimated surfaces as a function of discharge and time (surfaces include log concentration, standard error, and concentration)

printqUnitCheatSheet

Available Flow Unit properties

populateSiteINFO

Populate Site Information Columns

removeDuplicates

Remove Duplicates

tableChangeSingle

Create a table of the changes in flow-normalized concentration or flux values between various points in time in the record

Creates a plot of a time series of a particular flow statistic and a lowess smooth of that flow statistic

populateSampleColumns

Populate Sample Columns

Plot of the residuals from WRTDS (in log concentration units) versus the discharge

Creates the AnnualResults data frame from the Daily data frame

Prints EGRET object

Import NWIS Sample Data for EGRET analysis

Three box plots side-by-side

plotDiffContours

Plots the difference between two years from a contour plot created by plotContours

setUpEstimation

setUpEstimation

Compress sample data frame

estDailyFromSurfaces

Estimates all daily values of Concentration, Flux, Flow-Normalized Concentration, and Flow Normalized Flux

checkStartEndDate

checkStartEndDate

Graph of annual concentration and flow normalized concentration versus year

Estimate the three surfaces (for yHat, SE and ConcHat) as a function of DecYear and logQ and store in the three-dimensional object called surfaces

A box plot of WRTDS residuals by month

tableFlowChange

Prints table of change metrics for a given streamflow statistic

Produces 8-panel plot that is useful for determining if there is a flux bias problem

plotFluxTimeDaily

Plot of the time series of daily flux estimates and the sample values for the days that were sampled

populateConcentrations

Populate Concentration Columns

Data Overview for WRTDS

Create a character character that describes the period of analysis, when period of analysis has already been set in AnnualResults

Plot of the residuals from WRTDS versus the estimated values (all in log concentration units)

Table of annual results for discharge, concentration and flux

Processing of USGS NWIS Water Quality Data

A utility program for saving the contents of the workspace

Two box plots side-by-side, discharge on sample days, and discharge on all days

Create a table of the changes in flow-normalized values between various points in time in the record

Import NWIS Daily Data for EGRET analysis

Get Sample dataframe from EGRET object

Plot of the residuals from WRTDS (in log concentration units) versus time

Import Sample Data for WRTDS

Merge Sample and Daily Data into EGRET object

Makes four graphs of annual streamflow statistics on a single page

Sets up tick marks for an axis for a graph with an arithmetic scale which starts at zero

Get surfaces matrix from EGRET object

populateParameterINFO

Populate Parameter Information Columns

Plot of the discharge time series

Check for EGRET object

printFluxUnitCheatSheet

Available Flux Unit properties

Run the weighted survival regression for a set of estimation points (defined by DecYear and Log(Q))

Sample data plot: observed log flux vs log discharge

Segment estimates

readDataFromFile

Basic Data Import for Water Flow Data

Get Daily dataframe from EGRET object

plots 1 of the 15 graphs of streamflow statistics on a single page

setSeasonLabelByUser

Creates a character character that describes the period of analysis, when the period of analysis is being set by the user and not from AnnualResults

Graph of the standard deviation of the log of daily discharge versus year

Computes several values of the flow duration curve for streamflow centered on a specific date of the year

genericEGRETDotPlot

Generic EGRET plotting function

Plot of Observed Concentration versus Estimated Concentration

monthLabel-class

monthLabel class

Plot of Observed Concentration versus Time

Import user sample data for EGRET analysis

Sets up the period of analysis

Tricube weight function