PugetNitrate: Groundwater Quality

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

Groundwater Quality

Description

Selected groundwater nitrate and ancillary data collected near Puget Sound, Washington.

Usage

PugetNitrate

Format

Data frame with 1967 rows and 8 columns

Name	Type	Description
wellid	integer	Well identification number
l10	numeric	Percent urban land use wthin 3.2 km of well
l20	numeric	Percent agricultural land use wthin 3.2 kilometers of well
l40	numeric	Percent Forested land wthin 3.2 kilometers of well
surfgeo	character	Description of surficial geology at well
date	Date	Sample date
nitrate	numeric	Nitrate concentration, in milligrams per liter
wellmet	numeric	Well depth, in meters

For surfgeo, "Fine" and "Coarse" refer to fine-grained and coarse-grained glacial deposits.
Some censored nitrate concentrations are recorded as 0 in nitrate but the original data had multiple reporting levels of 0.05, 0.1, an 0.2. Therefore, all values less than or equal to 0.2 should be considered potentially censored.

Source

Data provided by Jim Tesoriero.

References

Tesoriero, A.J., and Voss, F.D., 1997, Predicting the probability of elevated nitrate concentrations in the Puget Sound Basin—Implications for aquifer susceptibility and vulnerability: Groundwater, v. 35, no. 6, p. 1029–1039.

Examples

## Not run: 
data(PugetNitrate)
# Suppress plotting the high value of 732 in Coarse
with(PugetNitrate, boxplot(split(pmin(nitrate, 50), surfgeo)))

## End(Not run)

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