Selected 1985-2016 data for eight (8) stations from the Chesapeake Bay Monitoring Program. Water quality variables are stored as either class 'num' for variables with no censoring or class 'Surv' (see survival::Surv) that allows for left- and interval-censored data.
dataCensoredA data frame with 13,062 rows and 17 variables:
station identifier
sample date
sample layer
Secchi depth [m]
Salinity [ppt]
Dissolved Oxygen [mg/L]
Water Temperature [deg C]
Corrected Chlorophyll-a [ug/L]
Total Nitrogen [mg/L]
Total Phosphorus [mg/L]
Total Suspended Solids [mg/L]
Dissolved Inorganic Nitrogen [mg/L]
Orthophosphorus [mg/L]
Total Dissolved Nitrogen [mg/L]
Total Dissolved Phosphorus [mg/L]
Ammonium [mg/L]
Nitrite + Nitrate [mg/L]