QWstacked: Stream Water Quality

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

Stream Water Quality

Description

Selected water-quality data for Judicial Ditch 64 near Mentor, Minnesota (SW4), USGS station number 05078470 for calendar year 2003.

Usage

QWstacked

Format

Data frame with 46 rows and 22 columns

Name	Type	Description
agency_cd	character	Agency code
site_no	character	USGS station number
sample_dt	Date	Sample date
sample_tm	character	Sample time
sample_end_dt	Date	Sample end date
sample_end_tm	character	Sample end time
sample_start_time_datum_cd	character	Time zone datum
tm_datum_rlbty_cd	character	Time datum reliability code
coll_ent_cd	character	Collecting agency code
medium_cd	character	Sample medium code
tu_id	character	Taxonomic unit code
body_part_id	character	Body part code
parm_cd	character	Analyte parameter code
remark_cd	character	Remark code for the result
result_va	character	Numeric value of the result
val_qual_tx	character	Result value qualifier code
meth_cd	character	Lab method code
dqi_cd	character	Data-quality indicator code
rpt_lev_va	character	Reporting level
rpt_lev_cd	character	Reporting level type
lab_std_va	character	Lab standard deviation
anl_ent_cd	character	Analyzing agency code

Note: all concentrations in the column result_va are in milligrams per liter as phosphorus.

Source

Data retrieved from NWISWeb (http://nwis.waterdata.usgs.gov/mn/nwis/qwdata) on 2012-04-06. The format of water-quality data is often retrieved by result–each row represents the data for a single analyte. Note that many columns are part of the generic data retrieval and do not pertain specifically to these data.

Examples

data(QWstacked)
# Plot the data for whole-water phosphorus
with(subset(QWstacked, parm_cd == "00665"), plot(sample_dt, result_va))
# Overlay the data for dissolved phosphorus (should be smaller values)
with(subset(QWstacked, parm_cd == "00666"), points(sample_dt, result_va, col='red'))

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