atrazine.spk: Atrazine Spike Data A dataset of atrazine environmental and...

In USGS-R/smwrQW: Tools for censored data analysis

Atrazine Spike Data A dataset of atrazine environmental and spike samples collected by the U.S. Geological Survey from October 1, 2001 through September 30, 2012.

Description

Atrazine Spike Data A dataset of atrazine environmental and spike samples collected by the U.S. Geological Survey from October 1, 2001 through September 30, 2012.

Usage

atrazine.spk

Format

Data frame with 596 rows and 22 columns

Name	Type	Description
pstaid	character	Not sure why we need this
suid	character	Study Unit Identifier, see Details
Date	Date	Date of sample
PARAMETER_CD	character	Parameter code
PARAMETER_NM	character	Parameter name
spkTime	character	Time of spike sample
spkMEDIUM_CD	character	Spike sample medium code
spkREMARK_CD	character	Spike sample remark code for value
spkRESULT_VA	numeric	Spike sample result value
spkSched	character	Spike sample schedule code
envTime	character	Time of environmental sample
envMEDIUM_CD	character	Environmental sample medium code
envREMARK_CD	character	Environmental sample remark code for value
envRESULT_VA	numeric	Environmental sample result value
envSched	character	Environmental sample schedule code
spkLotNo	numeric	Spike sample lot number
spkConc	numeric	Spike sample concentration
spkVol	numeric	Spike sample volume
envVol	numeric	Environmental sample volume
Recovery	numeric	Spike recovery, in percent
sname	character	USGS station name
staid	character	USGS station number

Details

A map of the study units can be found at https://water.usgs.gov/nawqa/nawqamap.html. Some of the study unit codes represent combined study units from that map.

Source

Data retreived from the national water information system and processed by Jeffery Martin of the U.S. Geological Survey.

Examples

data(atrazine.spk)
# The mean spike recovery
mean(atrazine.spk$Recovery)

USGS-R/smwrQW documentation built on Oct. 11, 2022, 6:13 a.m.