Uses the site data to calculate a natural stormwater run-off for a yearly rain event
Usage
calculate_tolerable_discharge(
area_catch = 10,
area_urban = 1,
area_plan = 0,
area_urban_upstream = area_catch/4,
slope_catch = 0.1,
Hq1pnat_catch = NULL,
Hq2pnat_catch = NULL,
verbose = TRUE
)Arguments
- area_catch
catchment area in km2
- area_urban
urban area around the planning area in km2
- area_plan
planning area in km2 (default is 0 -> no planning area)
- area_urban_upstream
urbanised area further upstream of the planning area in km2 (Default is 1/4 of the catchment area)
- slope_catch
average slope of the catchment area in % (Defalut is 0.1)
- Hq1pnat_catch
natural average catchment discharge for a yearly rain event in L/(s*km²) (Defautl is NULL)
- Hq2pnat_catch
natural average catchment discharge for a bienneal rain event in L/(s*km²) (Defautl is NULL)
- verbose
if TRUE returns results as informative messages, If FALSE only return numeric value for planning area.
Value
Table with tolerable discharge for the whole Catchment and planning area in L/s. Furthermore, x is given which is a factor for allowed discharge increase compared to the natural status and is included in the calculation for the tolerable discharges. The definition of x can be found in guideline DWA-A 102-3