KlamathTP | R Documentation |
Total phosphorus concentrations and streamflow data from the Klamath River near Klamath, California, USGS station number 11530500.
KlamathTP
Data frame with 80 rows and 6 columns
Name | Type | Description |
site_no | character | USGS station number |
sample_dt | Date | Sample date |
TP_rmk | character | Remark code for total phosphorus concentration |
TP | numeric | Total phosphorus concetration |
Flow | numeric | Streamflow, may be either daily mean or measured |
TP_ss | numeric | Total phosphorus concetration, modified for censoring |
Note: all concentrations are in milligrams per liter as phosphorus, the streamflow rates are in cubic feet per second.
Data retrieved from NWISWeb (http://nwis.waterdata.usgs.gov/ca/nwis/qw) on 2012-07-13. The data were retrieved and modified to replicate the results in Smith and others (1982).
Smith, R.A., Hirsch, R.M, and Slack, J.R., 1982, A study of trends in total phosphorus measurements at NASQAN stations: U.S. Geological Circular 2190, 34 p. Also available at http://pubs.usgs.gov/wsp/2190/report.pdf.
data(KlamathTP) par(mfrow=c(2,1), mar=c(5.1, 4.1, .5, .5)) # TP concentration over time (figure 11A in Smith and others (1982)) with(KlamathTP, plot(sample_dt, TP_ss)) abline(.15, -0.0000137) # Coefficients modified for actual graph units # Flow (or discharge) and TP concentration (figure 3A in Smith and others, 1982) with(KlamathTP, plot(Flow, TP_ss)) abline(0.014, 0.0000054) # Note difference in intercept
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