summarise_h2o_bal: Monthly Water Balance
In cvoter/isoH2Obudget: Lake Water Budget Using Stable Isotopes

Description Usage Arguments Value References

Calculates the water balance of a lake based measured fluxes and isotopic signatures of precipitation, the lake, and inflowing groundwater wells. Based on equations 2 and 4 in Krabbenhoft et al. (1990).

summarise_h2o_bal(
  lake,
  weather,
  lst,
  isotopes,
  lake_levels,
  gw_levels,
  dictionary,
  threshold = 0.01,
  start_date = NULL,
  end_date = NULL,
  annual = FALSE
)

`lake`	name of lake (e.g., Pleasant, Long, or Plainfield)
`weather`	a data frame with sub-monthly weather including including date (POSIXct), atmp (air temperature, deg C), P (precipitation, mm), RH (relative humidity, percent), Rs (solar radiation, MJ), and wind (wind speed, m/s)
`lst`	a data frame with sub-monthly lake surface temperature measurements as formatted in the lst_HOBO dataset, subset for a single lake.
`isotopes`	a data frame with isotopes measurements as formatted in the isotopes dataset, subset for a single lake.
`lake_levels`	a data frame with daily water level measurements as formatted in the lake_levels dataset, subset to lake level records for the lake of interest.
`gw_levels`	a data frame with daily water level measurements as formatted in the lake_levels dataset, subset to groundwater level records at the lake of interest.
`dictionary`	a data frame with site id numbers and static isotope site classifications as formatted in the dictionary dataset, subset to records for the lake of interest.
`threshold`	minimum median difference between lake levels and groundwater levels during the month of measurement in order to classify groundwater measurement.
`start_date`	optional start date to use for analysis (first day of the month) in POSIXct. If not provided, defaults to NULL and timeseries is based on months with isotope samples.
`end_date`	optional end date to use for analysis (last day of the month) in POSIXct. If not provided, defaults to NULL and timeseries is based on months with isotope samples.
`annual`	defaults to FALSE to calculate water balance on a monthly basis. If TRUE, calculates the annual balance instead.

monthly_h2o_bal, a data frame with the following columns:

date: first of the month for each monthly observation (Date)
P: monthly precipitation (mm)
E: monthly evapotranspiration (mm)
GWin: monthly groundwater inflow to the lake (mm)
GWout: monthly groundwater outflow to the lake (mm)
dV: monthly change in lake volume (mm)

Krabbenhoft, D. P., C. J. Bowser, M. P. Anderson, and J. W. Valley. (1990). Estimating Groundwater Exchange with Lakes: 1. The Stable Isotope Mass Balance Method. Water Resources Research, 26(10):2445-2453. https://doi.org/10.1029/WR026i010p02445

cvoter/isoH2Obudget documentation built on March 29, 2020, 11:07 a.m.