beale.period: Load estimation with Beale ratio estimator based on monthly...

In RiverLoad: Load Estimation of River Compounds with Different Methods

Description

Estimate the load using the Beale ratio methods (Quilbe' et al., 2006). The bias correction factor and the subsequent load estimation are calculated monthly or annually based on the user's specification in the 'period' argument.

Usage

beale.period(db, ncomp, period)

Arguments

db	An input data frame with at least three column. A column with DateTime in standard format (yyyy-mm-dd HH:MM:SS) labeled "datetime", a column with continuous flow records in cubic meter per second labeled "flow", and columns with scattered concentration data in milligram per litre. Alternatively, it can be used the output matrix of the function db.union.
ncomp	Number of compounds in the input data frame for which the load must be estimated.
period	A mandatory argument that specify the time period in which the regression relationship must be calculated. It can be "month" for a monthly estimation of load, or it can be "year" for annual estimation of load.

Value

A matrix with the estimated load for the different compounds. If the optional argument is equal to "month", the load values are reported by month in different rows. If the optional argument is equal to "year", the load values are reported by year in different rows. The load is expressed in gram per period of estimation.

Author(s)

Veronica Nava

References

Quilbe', R., Rousseau, A. N., Duchemin, M., Poulin, A., Gangbazo, G., & Villeneuve, J. P. (2006). Selecting a calculation method to estimate sediment and nutrient loads in streams: Application to the Beaurivage River (Quebec, Canada). Journal of Hydrology, 326(1-4), 295-310. https://doi.org/10.1016/j.jhydrol.2005.11.008

See Also

db.union beale.ratio

Examples

data("flow.data1","conc.data1")
union<-db.union(flow.data1, conc.data1)
beale.periodM<-beale.period(union, 2, "month")
beale.periodY<-beale.period(union, 2, "year")

Example output

Registered S3 method overwritten by 'quantmod':
  method            from
  as.zoo.data.frame zoo 

RiverLoad documentation built on Jan. 4, 2022, 5:07 p.m.