parameters.bsn

This file contains basin-level parameters.

Field	Description	Type	Unit	Default	Range
lai_noevap	Currently not used	real
sw_init	Initial soil water storage expressed as a fraction of field capacity water content	real		0	0-1
surq_lag	Surface runoff lag coefficient	real		4	1-24
adj_pkrt	Peak rate adjustment factor for sediment routing in the subbasin (tributary channels)	real		1	0.5-2
prf	Peak rate adjustment factor for sediment routing in the main channel	real		1	0-2
lin_sed	Currently not used	real
exp_sed	Currently not used	real
orgn_min	Rate factor for humus mineralization of active organic nutrients (N and P)	real		0.0003	0.001-0.003
n_uptake	Nitrogen uptake distribution parameter	real		20	0-100
p_uptake	Phosphorus uptake distribution parameter	real		20	0-100
n_perc	Nitrate percolation coefficient	real		0.2	0-1
p_perc	Phosphorus percolation coefficient	real	10m^3/M	10	10-17.5
p_soil	Phosphorus soil partitioning coefficient	real	m^3/Mg	175	100-200
p_avail	Phosphorus availability index	real		0.4	0.01-0.7
rsd_decomp	Residue decomposition coefficient	real		0.05	0.02-0.1
pest_perc	Pesticide percolation coefficient	real		0.5	0-1
msk_co1	Coefficient to control the impact of the storage time constant for normal flow on the overall storage time constant for the channel	real		0.75	0-10
msk_co2	Coefficient to control the impact of the storage time constant for low flow on the overall storage time constant for the channel	real		0.25	0-10
msk_x	Weighting factor control relative importance of inflow rate and outflow rate in determining storage on reach	real		0.2	0-0.3
nperco_lchtile	Nitrogen concentration coefficient for tile flow and leaching from bottom layer	real		0	0-1
evap_adj	Reach evaporation adjustment factor	real		0.6	0.5-1
scoef	Currently not used	real
denit_exp	Denitrification exponential rate coefficient	real		1.4	0-3
denit_frac	Denitrification threshold water content	real		1.3	0-1
man_bact	Currently not used	real
adj_uhyd	Adjustment factor for subdaily unit hydrograph basetime	real		0	0-1
cn_froz	Parameter for frozen soil adjustment on infiltration/runoff	real		0.000862	0-0
dorm_hr	Time threshold used to define dormancy	real	hrs	0	0-24
plaps	Precipitation lapse rate	real	mm/km
tlaps	Temperature lapse rate	real	deg C/km
n_fix_max	Maximum daily nitrogen fixation	real	kg/ha	20	1-20
rsd_decay	Minimum daily residue decay	real	fraction	0.01	0-0.05
rsd_cover	Currently not used	real
urb_init_abst	Maximum initial abstraction for urban areas	real		5	0-10
petco_pmpt	Currently not used	real
uhyd_alpha	Alpha coefficient for gamma function unit hydrograph	real		5	0.5-10
splash	Splash erosion coefficient	real		1	0.9-3.1
rill	Rill erosion coefficient	real		0.7	0.5-2
surq_exp	Exponential coefficient for overland flow	real		1.2	1-3
cov_mgt	Scaling parameter for cover and management factor for overland flow erosion	real		0.03	0.001-0.45
cha_d50	Currently not used	real
co2	CO2 concentration at start of simulation	real	ppm	1.57	1-5
day_lag_max	Currently not used	real
igen	Currently not used	integer