TNLoads: Stream Water Quality

In USGS-R/smwrData: Example hydrologic data to support statistical methods in water resources

Stream Water Quality

Description

Total nitrogen loads and basin characteristics for urban runoff.

Usage

TNLoads

Format

Data frame with 42 rows and 9 columns

Name	Type	Description
LOGTN	numeric	Log10 of (total nitrogen load, in pounds)
LOGDA	numeric	Log10 of (drainage area, in square miles)
LOGIMP	numeric	Log10 of (percentage impervious surface area [unitless])
MJTEMP	numeric	Mean minimum January temperature, in degrees Fahrenheit
MSRAIN	numeric	Mean seasonal rainfall, in inches
PRES	integer	Percentage of basin that is residential [unitless]
PNON	integer	Percentage of basin that is non-urban [unitless]
PCOMM	integer	Percentage of basin that is commercial [unitless]
PIND	integer	Percentage of basin that is industrial [unitless]

Source

Appendix C15 in Helsel and Hirsch (2002), from Mustard and others (1987).

References

Helsel, D.R., and Hirsch, R.M., 2002, Statistical methods in water resources: U.S. Geological Survey Techniques of Water-Resources Investigations, book 4, chap. A3, 522 p.

Mustard, D.C., Driver, N.E., Chyr, J., and Hansen, B.G., 1987, U.S. Geological Survey urban stormwater data base of constituent storm loads: U.S. Geological Survey Water-Resources Investigations Report 87-4036, 328 p.

Examples

data(TNLoads)
# Create a scatter plot matrix of the first 5 columns
# Shows the correlation amongst those variables.
# The remaining variables are even more discretized than MSRAIN
pairs(TNLoads[,1:5])

USGS-R/smwrData documentation built on Oct. 18, 2022, 9:56 a.m.