No. Parameter Parameter Description Range Value Assigned
  Initial Final
1 PARM 47 RUSLE C factor coefficient 0.5 – 1.5 1.5 0.5
2 PARM 18 Sediment routing exponent 1.0 – 1.5 1.5 2.0
3 PARM 76 Standing dead fall rate 0.0001 – 0.1 0.001 0.005
4 PARM 18 Sediment routing exponent 1.0 – 1.5 1.5 2.0
5 PARM 58 P Enrichment ratio exponent for routing 0.3 – 0.9 0.24 0.35
6 PARM 57 P Enrichment ratio coefficient or routing 0.05 – 0.20 0.78 0.05
7 PARM 59 P Upward movement by evaporation coefficient 1 – 20 0.5 1.0
8 PARM 8 Soluble P adsorption coefficient 10 – 20 20 16
9 PARM 62 Manure erosion equation coefficient 0.1 – 0.5 0.1 0.3
10 LBP Soluble phosphorus runoff estimate equation 0 or 1 0 1
11 PARM 96 Soluble P leaching KD value* 1 – 15 10 1.0
*Parameter modified to calibrate soluble P in tile.
Table 1: Model recalibration for utilizing APEX0806 (February, 2014) version with new routing capabilities for SP-tile and Langmuir equation.