Wetland Resources of Eastern South Dakota
Table 6
Table 6. Number of eastern South Dakota permanent wetland basins by water regime and size class.
| Size Class
(ac) | Na | Db | Ic |
| ≤0.5 | 2 (<1%) | 50 (11%) | 10 (3%) |
| 0.5-1.0 | 1 (<1%) | 40 (9%) | 9 (2%) |
| 1.0-2.0 | 3 (<1%) | 92 (20%) | 9 (2%) |
| 2.0-5.0 | 4 (<1%) | 115 (24%) | 32 (8%) |
| 5.0-10.0 | 4 (<1%) | 79 (17%) | 57 (15%) |
| 10.0-100.0 | 272 (45%) | 90 (19%) | 192 (50%) |
| >100 | 317 (53%) | 4 (1%) | 75 (20%) |
a Natural permanent basins
b Basins with permanent water regimes due to presence of an excavated feature such as a dugout
c Permanent impoundments
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