| Watershed : Watonwan River | |||
| Watershed Characteristics | Area (ac)* | Percentage | |
| Agroecoregions | Wetter Blue Earth Till | 302,894 | 55.9 |
| Wetter Clays and Silts | 86,262 | 15.9 | |
| Dryer Blue Earth Till | 82,219 | 15.2 | |
| Alluvium and Outwash | 67,742 | 12.5 | |
| Steep Stream Banks | 2,490 | 0.5 | |
| Counties | Watonwan | 275,015 | 50.8 |
| Cottonwood | 124,834 | 23.1 | |
| Blue Earth | 59,369 | 11.0 | |
| Martin | 50,754 | 9.4 | |
| Brown | 26,172 | 4.8 | |
| Jackson | 5,464 | 1.0 | |
| Slope Steepness | 0-2 Percent | 236,428 | 43.7 |
| 2-6 Percent | 255,225 | 47.1 | |
| 2-12 Percent | 49,415 | 9.1 | |
| Water | 538 | 0.1 | |
| Internal Drainage | Poorly drained | 196,412 | 36.3 |
| Poor/Improved by tiling | 33,454 | 6.2 | |
| Well drained | 311,203 | 57.5 | |
| Water | 538 | 0.1 | |
| Proximity to Water | Lake Shoreline | 19,481 | 3.6 |
| Permanent River | 46,708 | 8.6 | |
| Intermittent River | 68,046 | 12.6 | |
| Drainage Ditches | 41,931 | 7.7 | |
| Landlocked | 364,903 | 67.4 | |
| Geomorphology | Blue Earth Till Plain (066) | 389,823 | 72.0 |
| Minnesota Valley Outwash (032) | 69,074 | 12.8 | |
| Blue Earth-Garden City Ground Moraine (044) | 65,052 | 12.0 | |
| Wells-Rush River Ground Moraine (042) | 12,446 | 2.3 | |
| Minnesota Lake Plain (046) | 5,212 | 1.0 | |
| Water Erosion | Moderate | 89,421 | 16.5 |
| High | 222,853 | 41.2 | |
| Severe | 211,113 | 39.0 | |
| Extreme | 18,219 | 3.4 | |
| Wind Erosion Group | Severe | 259,565 | 47.9 |
| Moderate | 282,042 | 52.1 | |
| Crop Productivity | Low productivity | 25,053 | 4.6 |
| Medium productivity | 205,220 | 37.9 | |
| High productivity | 311,334 | 57.5 | |
| Precipitation | Between 26-28 inches | 223,920 | 41.3 |
| Between 28-30 inches | 300,848 | 55.6 | |
| Between 30-32 inches | 16,838 | 3.1 | |
| Growing Degree Days | 2000-2250 Degree Days | 566 | 0.1 |
| 2250-2500 Degree Days | 134,793 | 24.9 | |
| 2500-2750 Degree Days | 406,248 | 75.0 | |
| * Expressed as acres or percent for major watershed area in the Minnesota River Basin | |||