readNWISdv: Daily Value USGS NWIS Data Retrieval

In dataRetrieval: Retrieval Functions for USGS and EPA Hydrology and Water Quality Data

Daily Value USGS NWIS Data Retrieval

Description

Imports data from NWIS daily web service. This function gets the data from here: https://waterservices.usgs.gov/docs/dv-service/daily-values-service-details/ Inputs to this function are just USGS site ids, USGS parameter codes, USGS statistic codes, and start and end date. For a more complex query, use readNWISdata, with an argument service = "dv". Data coming the daily web services are aggregates of the instantaneous (sensor) web services. Not all statistical codes are available for all data. Use the function whatNWISdata to discover what data is available for a USGS site. The column data_type_cd with the values "dv" returned from whatNWISdata) are available from this service.

Usage

readNWISdv(
  siteNumbers,
  parameterCd,
  startDate = "",
  endDate = "",
  statCd = "00003"
)

Arguments

siteNumbers	character USGS site number. This is usually an 8 digit number. Multiple sites can be requested with a character vector.
parameterCd	character of USGS parameter code(s). This is usually an 5 digit number.
startDate	character starting date for data retrieval in the form YYYY-MM-DD. Default is "" which indicates retrieval for the earliest possible record. Date arguments are always specified in local time.
endDate	character ending date for data retrieval in the form YYYY-MM-DD. Default is "" which indicates retrieval for the latest possible record. Date arguments are always specified in local time.
statCd	character USGS statistic code. This is usually 5 digits. Daily mean (00003) is the default.

Details

More information on the web service can be found here: https://waterservices.usgs.gov/test-tools, choosing the "Daily Value Service".

Value

A data frame with the following columns:

Name	Type	Description
agency	character	The NWIS code for the agency reporting the data
site	character	The USGS site number
Date	Date	The date of the value
code	character	Any codes that qualify the corresponding value
value	numeric	The numeric value for the parameter

Note that code and value are repeated for the parameters requested. The names are of the form X_D_P_S, where X is literal, D is an option description of the parameter, P is the parameter code, and S is the statistic code (if applicable).

There are also several useful attributes attached to the data frame:

Name	Type	Description
url	character	The url used to generate the data
siteInfo	data.frame	A data frame containing information on the requested sites
variableInfo	data.frame	A data frame containing information on the requested parameters
statisticInfo	data.frame	A data frame containing information on the requested statistics on the data
queryTime	POSIXct	The time the data was returned

See Also

renameNWISColumns, importWaterML1

Examples

site_id <- "04085427"
startDate <- "2012-01-01"
endDate <- "2012-06-30"
pCode <- "00060"

rawDailyQ <- readNWISdv(site_id, pCode, startDate, endDate)
rawDailyQAndTempMeanMax <- readNWISdv(site_id, c("00010", "00060"),
  startDate, endDate,
  statCd = c("00001", "00003")
)
rawDailyQAndTempMeanMax <- renameNWISColumns(rawDailyQAndTempMeanMax)
rawDailyMultiSites <- readNWISdv(c("01491000", "01645000"), c("00010", "00060"),
  startDate, endDate,
  statCd = c("00001", "00003")
)
# Site with no data:
x <- readNWISdv("10258500", "00060", "2014-09-08", "2014-09-14")
names(attributes(x))
attr(x, "siteInfo")
attr(x, "variableInfo")

site <- "05212700"
notActive <- readNWISdv(site, "00060", "2014-01-01", "2014-01-07")

dataRetrieval documentation built on Oct. 31, 2024, 9:07 a.m.