R/ChoptankFlow.Rd.R

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

#' Daily Streamflow
#' 
#' Selected daily flow data for Choptank River near Greensboro, Maryland, USGS
#' station number 01491000.
#' 
#' 
#' @name ChoptankFlow
#' @docType data
#' @usage ChoptankFlow
#' @format Data frame with 8035 rows and 5 columns\cr
#' \tabular{lll}{ Name \tab Type \tab Description\cr\cr
#' agency_cd \tab character \tab Agency code\cr
#' site_no \tab character \tab USGS station number\cr
#' datetime \tab Date \tab Day\cr
#' Flow \tab numeric \tab Daily mean streamflow\cr
#' Flow_cd \tab character \tab Daily mean streamflow code\cr
#' } Note: the daily mean
#' streamflow rates are in cubic feet per second.
#' @source Data retrieved from NWISWeb
#' (\url{https://nwis.waterdata.usgs.gov/md/nwis/sw}) on 2012-06-19.
#' @keywords datasets
#' @examples
#' 
#' data(ChoptankFlow)
#' # The hydrograph for the entire record retrieved
#' par(mfrow=c(2,1), mar=c(4.1, 4.1, 1.1, 1.1))
#' with(ChoptankFlow, plot(datetime, Flow, type='l'))
#' # The hydrograph for a "typical water year"
#' with(subset(ChoptankFlow, datetime >= "2003-10-01" & datetime <= "2004-09-30"), 
#'   plot(datetime, Flow, type='l'))
#' 
NULL