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data.R
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#' Dissolved oxygen measurements from the Tres Palacios rivers
#'
#' Data from the Texas Commission on Environmental Quality Surface Water Quality
#' Monitoring Information System. The `AverageDO`` field is the mean of dissolved oxygen
#' concentrations (mg/L) measured at a field site at that day. The MinDO is the minimum
#' dissolved oxygen concentration measured at that site on that day.
#'
#' @docType data
#'
#' @usage data(Dissolved_Oxygen)
#'
#' @format A data frame with 236 rows and 6 variables:
#' \describe{
#' \item{Station_ID}{unique water quality monitoring station identifier}
#' \item{Date}{sampling date in yyyy-mm-dd format}
#' \item{Param_Code}{unique parameter code}
#' \item{Param_Desc}{parameter description with units}
#' \item{Average_DO}{mean of dissolved oxygen measurement, in mg/L}
#' \item{Min_DO}{minimum of dissolved oxygen measurement, in mg/L}
#' }
#' @source https://www80.tceq.texas.gov/SwqmisPublic/public/default.htm
#'
"Dissolved_Oxygen"