Table 1 Calibrated model parameter values for flow rate and sediment, POC and DOC loads in the study watershed
Variable | Parameter* | Explanation | Calibrated value |
|---|---|---|---|
|  | V_SFTMP | Snowfall temperature (°C) | − 0.375 |
R_CN2 | Curve number | −9% | |
V_SURLAG | Surface runoff lag coefficient | 0.28 | |
Flow rate | V_ESCO | Soil evaporation compensation factor | 0.77 |
V_SLSOIL | Slope length for lateral flow (m) | 13.5 | |
V_ALPHA_BF | Baseflow alpha factor (1/days) | 0.0565 | |
V_GW_DELAY | Groundwater delay (day) | 13.5 | |
Sediment | R_USLE_K | USLE soil erosivity factor | 0 |
V_USLE_P | USLE support practice factor | 1 | |
V_ADJ_PKR | Peak rate adjustment factor in tributary channels | 1 | |
V_PRF | Peak rate adjustment factor in main channels | 0.022 | |
V_SPCON | Linear parameter for sediment routing in main channels | 0.003238 | |
V_SPEXP | Exponent parameter for sediment routing in main channels | 1.1975 | |
V_ERPOC | POC enrichment ratio | 2.98 | |
POC | V_Vlpoc | LPOC settling velocity (m day−1) | 0.12 |
V_Vrpoc | RPOC settling velocity (m day−1) | 0.36 | |
DOC | V_kOC | Organic C partition coefficient | 4185 |
V_βDOC | DOC percolation coefficient for top soil | 0.83 |