urban.urb

The urban database summarizes parameters used by the model to simulate different types of urban areas.

Field	Description	Type	Unit	Default	Range
name	Name of the urban land type	string	n/a	n/a	n/a
frac_imp	Fraction of total impervious area in urban land type	real	fraction	0.05	0.0-1.0
frac_dc_imp	Fraction of directly connected impervious area in urban land type	real	fraction	0.05	0.0-1.0
curb_den	Curb length density	real	km/ha	0.0	0.0-1.0
urb_wash	Wash-off coefficient for removal of constituents from impervious surfaces	real	1/mm	0.0	0.0-1.0
dirt_max	Maximum amount of solids allowed to build up on impervious surfaces	real	kg/curb km	1000.0	0.0-2000.0
t_halfmax	Time for amount of solids on impervious areas to build up to 1/2 of maximum level	real	days	1.0	0.0-100.0
conc_totn	Concentration of total N in suspended solid load from impervious areas	real	mg/kg	0.0	0.0-1000.0
conc_totp	Concentration of total P in suspended solid load from impervious areas	real	mg/kg	0.0	0.0-1000.0
conc_no3n	Concentration of NO3-N in suspended solid load from impervious areas	real	mg/kg	0.0	0.0-50.0
urb_cn	Moisture condition II curve number for impervious areas	real	none	0.0	30.0-100.0