Before calibrating the model, the sensitivity analysis was performed to identify the sensitive parameters with a global sensitivity analysis method using the SUFI-2 algorithm (part of the SWAT-CUP tool). Out of several parameters, 18 were selected (shown in Table 7) for streamflow simulation based on other literature for the study region (Setti *et al.* 2020a, 2020b). The model was calibrated at daily and monthly time scales; at each scale, 18 parameters were used for model calibration.

Table 7

Sl.No . | Parameters . | Description . |
---|---|---|

1 | RCHRG_DP | Deep aquifer percolation fraction |

2 | ESCO | Soil evaporation compensation factor |

3 | SOL_K | Soil hydraulic conductivity (mm/hr) |

4 | SOL_AWC | Available water capacity of the soil layer (mm) |

5 | CN2 | Curve number |

6 | LAT_TTIME | Lateral flow travel time (days) |

7 | GW_DELAY | Groundwater delay (days) |

8 | CH_N2 | Manning's ‘n’ value for the main channel |

9 | SLSUBBSN | Average slope length (m) |

10 | HRU_SLP | Average slope steepness (m/m) |

11 | EPCO | Plant evaporation compensation factor |

12 | CH_K2 | Hydraulic conductivity of main channel (mm/hr) |

13 | GW_REVAP | Groundwater recap coefficient |

14 | GWQMN | Threshold depth of water in the shallow aquifer (mm) |

15 | ALPHA_BF | Baseflow alpha factor (days) |

16 | REVAPMN | Threshold depth of water in the shallow aquifer for recap to occur (mm) |

17 | OV_N | Manning's ‘n’ value for overland flow |

18 | SURLAG | Surface runoff lag time |

Sl.No . | Parameters . | Description . |
---|---|---|

1 | RCHRG_DP | Deep aquifer percolation fraction |

2 | ESCO | Soil evaporation compensation factor |

3 | SOL_K | Soil hydraulic conductivity (mm/hr) |

4 | SOL_AWC | Available water capacity of the soil layer (mm) |

5 | CN2 | Curve number |

6 | LAT_TTIME | Lateral flow travel time (days) |

7 | GW_DELAY | Groundwater delay (days) |

8 | CH_N2 | Manning's ‘n’ value for the main channel |

9 | SLSUBBSN | Average slope length (m) |

10 | HRU_SLP | Average slope steepness (m/m) |

11 | EPCO | Plant evaporation compensation factor |

12 | CH_K2 | Hydraulic conductivity of main channel (mm/hr) |

13 | GW_REVAP | Groundwater recap coefficient |

14 | GWQMN | Threshold depth of water in the shallow aquifer (mm) |

15 | ALPHA_BF | Baseflow alpha factor (days) |

16 | REVAPMN | Threshold depth of water in the shallow aquifer for recap to occur (mm) |

17 | OV_N | Manning's ‘n’ value for overland flow |

18 | SURLAG | Surface runoff lag time |

This site uses cookies. By continuing to use our website, you are agreeing to our privacy policy.