readNWISdv {dataRetrieval}

Daily Value USGS NWIS Data Retrieval

Description

Imports data from NWIS web service. This function gets the data from here: https://waterservices.usgs.gov/

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.

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")