The rate of the yearly rain event depends on the prescribed duration. In this function the duration is either calculated using the natural catchment discharge, using the average river flow or entered manually.
Usage
get_rain(
area_catch,
river_cross_section,
river_length,
x_coordinate,
y_coordinate,
Hq_pnat1_catch = NULL,
slope = 0.1,
use_p1nat = TRUE,
river_mean_flow = NULL,
mins = NULL
)Arguments
- area_catch
The catchment area in km2
- river_cross_section
The average river cross section in the catchment in m2
- river_length
The length of the affected urban river stretch in m
- x_coordinate, y_coordinate
coordinates in ETRS89. See Datails for more information.
- Hq_pnat1_catch
the natural catchment discharge for a yearly rain event in L/(s*km2). If NULL it will be estimated by slope and area of the catchment
- slope
Average slope of the catchment in % (Default is 0.1)
- use_p1nat
If TRUE, the natural catchment discharge is used (see get_Hq1_pnat) is used to define the precipitation duration. If FALSE the average river flow is used. Exception: If mins is defined, this value is used.
- river_mean_flow
The average river flow in m³/s (only needed if use_p1nat = FALSE and min = NULL)
- mins
The Default is NULL. In this case either natural catchment discharge or average river flow is used for precipitation duration. If not Null, mins is used and overwrites the parameter "use_p1nat".