| Watershed : Tamarac River | |||
| Watershed Characteristics | Area (ac)* | Percentage | |
| Agroecoregions | Swelling Clay Lake Sediments | 204,700 | 36.0 |
| Inter-Beach Sand Bars | 203,479 | 35.3 | |
| Very Poorly Drained Lake Sediments | 121,257 | 21.0 | |
| Somewhat Poorly Drained Lake Sediments | 47,414 | 8.2 | |
| Counties | Kittson | 318,828 | 55.3 |
| Marshall | 247,730 | 42.9 | |
| Roseau | 10,292 | 1.8 | |
| Slope Steepness | 0-2 % | 455,991 | 79.0 |
| 2-6 % | 120,859 | 21.0 | |
| Drainage | Poorly Drained | 267,560 | 46.4 |
| Poor Improved by Tiling | 156,345 | 27.1 | |
| Well Drained | 151,270 | 26.2 | |
| No Rating | 1,675 | 0.3 | |
| Proximity | Land Locked | 441,961 | 76.6 |
| Intermittent River | 58,076 | 10.1 | |
| Drainage Ditches | 57,438 | 10.0 | |
| Permanent River | 19,103 | 3.3 | |
| Lake Shoreline | 272 | 0.1 | |
| Geomorphology | Agassiz Lacustrine Plain, Red River Valley Area | 367,500 | 63.7 |
| Agassiz Lacustrine Plain, Inter-Beach Area | 161,937 | 28.1 | |
| Agassiz Lacustrine Plain, Beltrami Island Area | 47,414 | 8.2 | |
| Water Erosion | Slight | 25,886 | 4.5 |
| Moderate | 516,805 | 89.6 | |
| High | 34,159 | 5.9 | |
| Wind Erosion Group | Very Severe | 159,706 | 27.7 |
| Severe | 335,910 | 58.2 | |
| High | 24,577 | 4.3 | |
| Moderate | 56,658 | 9.8 | |
| Precipitation | Between 18-20 inches | 549,879 | 95.3 |
| Between 20-22 inches | 26,032 | 4.5 | |
| No rating | 939 | 0.2 | |
| Growing Degree Days | 1500-1750 Degree Days | 124,726 | 21.6 |
| 1750-2000 Degree Days | 199,751 | 34.6 | |
| 2000-2250 Degree Days | 251,434 | 43.6 | |
| No rating | 939 | 0.3 | |
| 576,850 | |||
| * Expressed as acres or percent for major watershed area in the Red River of the North basin | |||