Process | APEX | SWAT | SWAT+ |
Runoff | Runoff CN initial abstraction (PARM20) CN retention coefficient (PARM92) | Initial SCS curve number II (CN2) Runoff lag coefficient (SURLAG) | Initial SCS curve number II (CN2) Runoff lag coefficient (SURLAG) |
ET | Soil evaporation coefficient (PARM12) Evaporation plant cover factor (PARM17) | Soil evaporation factor (ESCO) Plant uptake factor (EPCO) | Plant uptake factor (EPCO) |
Plant uptake factor (EPCO) | |||
Baseflow/ Drainage | Return flow ratio (RFPO) Subsurface flow factor (PARM90) GW storage threshold for return flow (PARM40 Saturated conductivity factor (SATO) Groundwater residence time (RFTO) | Baseflow alpha-factor (ALPHA_BF) Groundwater “revap” coefficient (REVAP) GW storage threshold for return flow (GWQMN) Hydraulic conductivity (SOL_K) GW delay (GW DELAY) | Baseflow alpha-factor (ALPHA_BF) Groundwater “revap” coefficient (REVAP) GW storage threshold for return flow to occur (FLOMIN) Hydraulic conductivity (SOL_K) Percolation coefficient (PERCO) |
Erosion/ Sediment | Peak runoff rate-rainfall energy factor (APM) Support practice factor (PEC) Sediment routing exponent (PARM18) | Peak rate adjustment factor for sediment routing (AJ_PKR) Support practice factor (USLE P) Soil erodibility factor (USLE K) | Peak rate adjustment factor for sediment routing (AJ_PKR) Support practice factor (USLE P) Soil erodibility factor (USLE K) |
Phosphorous loss | Soluble P runoff coefficient (PARM8) P upward movement factor (PARM59) | P percolation factor (PPERCO) P soil partitioning factor (PHOSKD) Phosphorous availability index (PSP) | P percolation factor (PPERCO) P soil partitioning factor (PHOSKD) Phosphorous availability index (PSP) |