TNLoads | R Documentation |
Total nitrogen loads and basin characteristics for urban runoff.
TNLoads
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] |
Appendix C15 in Helsel and Hirsch (2002), from Mustard and others (1987).
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.
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])
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