Wetland Resources of Eastern South Dakota
Table 4
Table 4. Number of eastern South Dakota temporary, seasonal, and semipermanent basins by water regime and size class.
| Size Class
(ac) | Temporary | Seasonal | Semipermanent |
| | | | Na | Db | Ic |
| ≤0.5 | 363,350 (70%) | 172,428 (52%) | 2,104 (9%) | 17,109 (44%) | 2,229 (19%) |
| 0.5-1.0 | 73,959 (14%) | 52,239 (16%) | 2,055 (9%) | 3,474 (9%) | 1,923(17%) |
| 1.0-2.0 | 47,615 (9%) | 44,481 (13%) | 3,114 (13%) | 3,057 (8%) | 1,900 (16%) |
| 2.0-5.0 | 27,555 (5%) | 41,677(12%) | 5,504 (23%) | 5,615(15%) | 2,203 (19%) |
| 5.0-10.0 | 6,439 (1%) | 15,606 (5%) | 4,226 (18%) | 4,172 (11%) | 1,394 (12%) |
| 10.0-100.0 | 1,461 (<1%) | 8,212 (2%) | 6,436 (27%) | 5,080 (13%) | 1,786 (15%) |
| >100 | 0 (0%) | 56 (<1%) | 558 (2%) | 246 (<1%) | 92 (<1%) |
a Natural semipermanent basins
b Basins with semipermanent water regimes due to presence of an excavated feature such as a dugout
c Semipermanent impoundments
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