| County : Watonwan | |||
| County Characteristics | Area (ac)* | Percentage | |
| Major Watersheds | Watonwan River | 275,126 | 97.6 |
| Middle Minnesota River | 6,160 | 2.2 | |
| Blue Earth River | 628 | 0.2 | |
| Agroecoregions | Wetter Blue Earth Till | 152,478 | 54.1 |
| Wetter Clays and Silts | 50,888 | 18.1 | |
| Alluvium and Outwash | 50,789 | 18.0 | |
| Dryer Blue Earth Till | 27,759 | 9.9 | |
| Slope Steepness | 0-2 Percent | 143,622 | 51.0 |
| 2-6 Percent | 110,105 | 39.1 | |
| 2-12 Percent | 27,996 | 9.9 | |
| Water | 190 | 0.1 | |
| Internal Drainage | Poorly drained | 123,651 | 43.9 |
| Poor/Improved by tiling | 16,697 | 5.9 | |
| Well drained | 141,376 | 50.2 | |
| Water | 190 | 0.1 | |
| Proximity to Water | Landlocked | 194,285 | 68.9 |
| Drainage Ditches | 29,383 | 10.4 | |
| Permanent River | 24,962 | 8.9 | |
| Intermittent River | 23,492 | 8.3 | |
| Lake Shoreline | 9,602 | 3.4 | |
| Water | 190 | 0.1 | |
| Geomorphology | Blue Earth Till Plain (066) | 186,153 | 66.0 |
| Minnesota Valley Outwash (032) | 50,228 | 17.8 | |
| Blue Earth-Garden City Ground Moraine (044) | 32,684 | 11.6 | |
| Wells-Rush River Ground Moraine (042) | 12,348 | 4.4 | |
| Minnesota Lake Plain (046) | 502 | 0.2 | |
| Water Erosion | Moderate | 19,714 | 7.0 |
| High | 146,701 | 52.0 | |
| Severe | 114,299 | 40.5 | |
| Extreme | 1,201 | 0.4 | |
| Wind Erosion Group | Severe | 137,776 | 48.9 |
| Moderate | 144,138 | 51.1 | |
| Crop Productivity | Low productivity | 20,843 | 7.4 |
| Medium productivity | 41,629 | 14.8 | |
| High productivity | 219,442 | 77.8 | |
| Precipitation | Between 26-28 inches | 119,574 | 42.4 |
| Between 28-30 inches | 162,340 | 57.6 | |
| Growing Degree Days | 2250-2500 Degree Days | 50,903 | 18.1 |
| 2500-2750 Degree Days | 231,011 | 81.9 | |
| * Expressed as acres or percent for County area in the Minnesota River Basin | |||