Table 6 Regression of water quality parameters in different seasons at different scales.
Scale | Season | Para | Regression | Moderate R2 |
|---|---|---|---|---|
500 | flood | NH3-N | 0.146*AREA_MN_OR + 0.055*NP_ WA − 0.001*TE_BU + 0.323 | 0.74 |
500 | flood | CODMn | 0.036*IJI_OR − 0.214*PD_FA − 4.333*FRAC_ AM_FO + 7.868 | 0.73 |
500 | low water | CODMn | −15.273*FRAC_AM_BU − 0.024*ENN_MN_ BU + 0.126NP_FA + 0.558*SHAPE_AM_ OR + 0.021*IJI_BU + 20.303 | 0.70 |
500 | low water | DTP | 0.001*ENN_MN_WA − 0.037*LSI_ OR + 0.004CA_WA + 0.078 | 0.69 |
500 | low water | TN | −0.101*IJI_FO | 0.64 |
Local | flood | Petro | 0.001*ENN_MN_FO − 0.002*ED_ BU + 0.001*ENN_MN_FA − 0.001*CA_ WA + 0.002*SHAPE_AM_WA + 0.001*LPI_ FO + 0.198 | 0.64 |
Local | normal water | Petro | −0.005*SHAPE_AM_BU + 0.001*ENN_MN_BU + 0.001*COHESION_FO + 0.001*ED_BU + 0.100 | 0.61 |
Local | low water | Petro | 0.001*ENN_MN_BU − 0.014*COHESION_ BU + 0.031*LPI_OR − 1.087*FRAC_AM_ OR + 0.011*PD_FA + 2.573 | 0.57 |
2000 | low water | NH3-N | 0.001*CA_BU + 0.010*IJI_FO − 0.001*TE_ ED − 0.015*IJI_BU + 0.010*IJI_ WA + 0.009*ENN_MN_WA + 0.026*SHAPE_ AM_WA − 0.329 | 0.55 |
500 | normal water | NH3-N | 0.122*AREA_MN_OR + 0.424 | 0.55 |
2000 | flood | Petro | −0.002*ED_BU − 0.001*TE_WA + 0.005*LSI_ FA + 0.006*PD_FA + 0.003*PD_OR + 0.117 | 0.53 |
2000 | normal water | NH3-N | −0.021*PLAND_WA + 0.005*IJI_ FO + 0.046*SHAPE_AM_WA − 0.006*ED_ BU + 0.009*COHESION_FO − 0.238*SHAPE_AM_FO + 0.411 | 0.53 |
500 | low water | BOD | −15.897*FRAC_AM_BU − 0.010*ENN_ MN_FO + 21.611 | 0.52 |
Local | low water | NH3-N | 27.497*FRAC_AM_OR + 0.001*CA_WA + 0.001*ENN_ MN_FO − 28.687 | 0.49 |
2000 | normal water | Petro | −0.001*ED_BU + 0.003*PLAND_OR + 0.001*CA_ FA-0.014*SHAPE_AM_OR + 0.101 | 0.45 |
1000 | flood | BOD | −16.944*FRAC_AM_FO − 0.045*ENN_ MN_WA + 24.792 | 0.43 |
