TABLE 4.
Parameters used in sensitivity analysis and their detail descriptions (Neitsch et al. 2011).
| Parameter | Description | SWAT governing process | SWAT parametrized scale |
|---|---|---|---|
| CN2 | SCS runoff curve number for moisture condition II | Runoff | HRU |
| NDTARGR | Number of days to reach target storage from current reservoir storage | Reservoir flow | Reservoir |
| ESCO | Soil evaporation compensation coefficient | ET | HRU |
| SURLAG | Surface runoff lag coefficient | Runoff | Basin |
| SMFMN | Melt factor for snow on December 21 (mm H2O/day — °C) | Snow | Basin |
| EPCO | Plant uptake compensation factor | ET | HRU |
| SFTMP | Mean air temperature at which precipitation is equally likely to be rain as snow/freezing rain (°C) | Snow | Basin |
| SMTMP | Threshold temperature for snowmelt (°C) | Snow | Basin |
| SMFMX | Melt factor on June 21 (mm H2O/day — °C) | Snow | Basin |
| RCHRG_DP | Aquifer percolation coefficient | Groundwater | HRU |
| GW_DELAY | Delay time for aquifer recharge (days) | Groundwater | HRU |
| ALPHA_BF | Baseflow recession constant | Baseflow | HRU |
| REVAPMN | Threshold water level in the shallow aquifer for revap (mm H2O) | Groundwater | HRU |
| OV_N | Manning’s “n” value for overland flow | Runoff | HRU |
| CH_K2 | Effective hydraulic conductivity of channel (mm/h) | Channel routing | Subwatershed |
| TIMP | Snow temperature lag factor | Snow | Basin |
| GW_REVAP | Revap coefficient | Groundwater | HRU |
| CH_N2 | Manning’s “n” value for the main channel | Channel routing | Subwatershed |
| SOL_AWC | Soil available water capacity | Runoff | HRU |
| GWQMN | Threshold water level in shallow aquifer for baseflow (mm H2O) | Groundwater | HRU |
| ALPHA_BNK | Bank flow recession constant or constant of proportionality | Channel routing | Subwatershed |
Note: HRU, hydrologic response unit.