Table 9.
Information on the Top 10 HUC8 Subbasins Producing the Highest Nutrient Loads
| HUC8 | PREC (mm) | SurQ (mm) | USLE_LS | Cropland Percentage (%) | TSS (t/ha) | TN (kg/ha) | TP (kg/ha) | OrgN (kg/ha) | DisNa (kg/ha) | OrgP | DisPb (kg/ha) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10240009 | 931.6 | 198.7 | 0.8 | 49.5 | 16.5 | 42.0 | 8.3 | 36.6 | 5.4 | 8.2 | 0.1 |
| 10230007 | 838.4 | 191.0 | 1.1 | 69.2 | 30.1 | 41.8 | 10.7 | 33.6 | 8.2 | 10.5 | 0.1 |
| 10240006 | 801.2 | 215.3 | 0.6 | 60.8 | 17.5 | 40.1 | 8.8 | 31.6 | 8.5 | 8.7 | 0.1 |
| 10240002 | 895.0 | 212.4 | 0.8 | 76.5 | 19.2 | 38.9 | 9.9 | 30.9 | 8.0 | 9.7 | 0.2 |
| 10300104 | 1074.2 | 279.4 | 0.5 | 40.7 | 9.8 | 36.6 | 6.6 | 30.3 | 6.3 | 6.4 | 0.2 |
| 10240008 | 836.1 | 253.6 | 0.6 | 52.1 | 16.8 | 36.2 | 7.8 | 28.6 | 7.6 | 7.6 | 0.1 |
| 10230006 | 827.8 | 177.3 | 1.0 | 48.1 | 12.4 | 35.9 | 7.4 | 28.4 | 7.5 | 7.3 | 0.2 |
| 10240003 | 923.9 | 225.8 | 0.8 | 66.0 | 16.6 | 32.6 | 8.3 | 25.3 | 7.3 | 8.2 | 0.2 |
| 10240010 | 924.8 | 181.8 | 0.7 | 48.6 | 7.5 | 31.5 | 5.8 | 25.8 | 5.7 | 10.5 | 0.1 |
| 10240012 | 986.0 | 219.1 | 0.6 | 37.9 | 8.6 | 28.0 | 5.1 | 22.7 | 5.3 | 8.7 | 0.1 |
Abbreviations: DisN, dissolved nitrogen; DisP, dissolved phosphorus; OrgN, organic N; OrgP, organic phosphorus; PREC, precipitation; SURQ, surface runoff; TN, total nitrogen; TP, total phosphorus; TSS, total suspended sediment; USLE, Universal Soil Loss Equation; USLE_LS, USLE equation slope factor.
a
Refers to nitrate and nitrite.
b
Refers to mineral P.