Calculate connectable area to a river based on pollutant input within a heavy rain event

Usage

maxArea_event(
  Q_river,
  Ci_river,
  Ci_threshold,
  Ci_storm,
  coeff_runoff,
  q_rain,
  t_rain,
  river_length,
  river_cross_section,
  catchment_area = 100
)

Arguments

Q_river: Average River flow in m3/s
Ci_river: Background concentration for substance i. Concentration unit must fit to Ci_threshold and Ci_storm.
Ci_threshold: Threshold value for substance i. Concentration unit must fit to Ci_river and Ci_storm.
Ci_storm: Concentration in stormwater run-off for substance i. Concentration unit must fit to Ci_threshold and Ci_river.
coeff_runoff: runoff coefficient of connected impervious area
q_rain: rain amount in mm/(ha*s)
t_rain: duration of rain in s
river_length: length of impacted urban river stretch in m
river_cross_section: average cross section of river in m2
catchment_area: Catchment area in ha.

Value

maximal connectable area in ha

Details

The catchment_area is used as initial value for the optimisation algorithm. The default 100 ha should be sufficient for most problems. In that case the optimal solution between 0 and 1 000 km²