| Name |
Description |
Units |
Possible range |
Default |
Calibrated value |
| Coos Bay |
Coquille River |
Willapa Bay |
Yaquina Bay |
| carea_max |
Maximum possible area contributing to surface
runoff expressed as a portion of the HRU area |
Decimal fraction |
0 to 1 |
0.6 |
0.6 |
0.6 |
0.3 |
0.3 |
| crad_coef |
Coefficient(B) in Thompson(1976) equation |
None |
0.1 to 0.7 |
0.4 |
0.7 |
0.7 |
0.7 |
0.7 |
| fastcoef_lin |
Coefficient to route preferential-flow storage
down slope |
1 per day |
0 to 1 |
0.1 |
0.1 |
0.5 |
0.7 |
0.7 |
| fastcoef_sq |
Coefficient to route preferential-flow storage
down slope |
None |
0 to 1 |
0.8 |
1 |
1 |
1 |
1 |
| gwflow_coef |
Groundwater routing coefficient |
1 per day |
0 to 1 |
0.015 |
0.025 |
0.017 |
0.017 |
0.017 |
| gwstor_init |
Storage in each groundwater reservoir at the
beginning of a simulation |
Inches |
0 to 20 |
0.1 |
0.1 |
0.1 |
3 |
3 |
| imperv_stor_max |
Maximum impervious area retention storage for
each HRU |
Inches |
0 to 10 |
0 |
0 |
0.1 |
0 |
0.1 |
| jh_coef |
Monthly air temperature coefficient used in
Jensen-Haise PET computations |
Per degrees |
0.005 to 0.06 |
0.014 |
0.025 to 0.05 |
0.006 to 0.02 |
.009 to .013 |
0.007 to 0.036 |
| jh_coef_hru |
Air temperature coefficient used in Jensen-Haise
potential evapotranspiration computations for each HRU. |
Per degrees |
5 to 20 |
13 |
GIS value * 0.8 |
GIS value |
GIS value |
GIS value |
| melt_look |
Julian date to start looking for spring snowmelt
stage |
Julian day |
1 to 366 |
90 |
1 |
1 |
1 |
1 |
| pref_flow_den |
Preferential-flow pore density |
Decimal fraction |
0 to 1 |
0.2 |
0.2 |
0.2 |
0.2 |
0.1 |
| sat_threshold |
Soil saturation threshold, above field-capacity
threshold |
Inches |
1 to 999 |
999 |
999 |
999 |
999 |
15 |
| slowcoef_lin |
Coefficient to route gravity-flow storage down
slope |
1 per day |
0 to 1 |
0.1 |
0.015 |
0.1 |
0.003 |
0.003 |
| smidx_coef |
Coefficient in non-linear contributing area
algorithm |
Decimal fraction |
0.0001 to 1 |
0.01 |
0.001 |
0.001 |
0.001 |
0.001 |
| snarea_curve |
Snow area depletion curve values, 11 values
for each curve (0.0 to 1.0 in 0.1 increments) |
Decimal fraction |
0 to 1 |
1 |
0.05 to 1 |
0.05 to 1 |
0.05 to 1 |
0.05 to 1 |
| soil_moist_init |
Initial value of available water in soil profile |
Inches |
0 to 20 |
3 |
3 |
3 |
0.1 |
0.1 |
| soil_moist_max |
Maximum available water holding capacity of
soil profile for each HRU |
Inches |
0 to 20 |
6 |
GIS value * 0.8 |
GIS value |
GIS value |
GIS value * 1.5 |
| soil_rechr_max |
Maximum value for soil recharge zone (upper
portion of soil_moist where losses occur as both evaporation and
transpiration). |
Inches |
0 to 10 |
2 |
GIS value * 0.8 |
GIS value |
GIS value |
GIS value |
| soil2gw_max |
The maximum amount of the soil water excess
for an HRU that is routed directly to the associated groundwater
reservoir each day |
Inches |
0 to 5 |
0 |
0.05 |
0.6 |
0.1 |
0.1 |
| ssr2gw_exp |
Coefficient in equation used to route water
from the subsurface reservoirs to the groundwater reservoirs |
None |
0 to 3 |
1 |
1 |
0.5 |
0.5 |
0.5 |
| ssr2gw_rate |
Coefficient in equation used to route water
from the subsurface reservoirs to the groundwater reservoirs |
1 per day |
0 to 1 |
0.1 |
0.15 |
0.001 |
0.001 |
0.001 |
| tmax_allrain |
If maximum temperature of an HRU is greater
than or equal to this value (for each month, January to December),
precipitation is assumed to be rain, in deg C or F, depending on
units of data |
Degrees |
0 to 90 |
40 |
41 to 74 |
41 to 74 |
41 to 74 |
41 to 74 |
| tmax_lapse |
Change in min. temp. per 1000 elev_units of
elevation change for each month |
Degrees |
-10 to 10 |
3 |
-2.0 to -0.6 |
-9.2 to 10 |
-2.0 to -0.6 |
-4.0 to -1.3 |
| tmin_lapse |
Change in min. temp. per 1000 elev_units of
elevation change for each month |
Degrees |
-10 to 10 |
3 |
-1.3 to -0.2 |
-4.7 to 0 |
-1.3 to -0.2 |
-2.57 to -0.47 |
| transp_beg |
Month to begin summing tmaxf for each HRU; when
sum is >= to transp_tmax, transpiration begins |
Month |
1 to 12 |
4 |
4 |
4 |
1 |
1 |
| transp_end |
Month to stop transpiration computations; transpiration
is computed thru end of previous month |
Month |
1 to 12 |
10 |
10 |
10 |
12 |
12 |
U.S. Department of the Interior |
U.S. Geological Survey
