Add outflows to Aeme object

Usage

add_outflows(aeme, data = NULL, elevation = NULL, factor = NULL)

aeme: aeme; object.
data: named list with data frames for each outflow. Each data frame must have columns "Date", "outflow". If NULL, no outflows are added.
elevation: named list with elevation of each outflow. If NULL, no outflows are added. If elevation is -1, the outflow is assumed to be at the same elevation as the hypsograph. If elevation is not -1, it must be within the range of the hypsograph elevation.
factor: named list with scaling factors to apply to outflows per model. If NULL, no scaling is applied.

Aeme object with outflows added