Table 1.
Characteristics of ecoregions as derived from National Wetland Inventory (NWI) and National Hydrography Dataset (NHD) datasets
| Ecoregion | Size (ha) | Annual Precipitation (1981–2010) Normal (mm) | NHD stream density (m ha−1) | NWI wetland area (m2 ha−1) | NWI wetland density (# per ha) | Non-channel connected NWI wetlands (%) | Non-channel connected NWI wetland area (%) |
|---|---|---|---|---|---|---|---|
| Lowland | 887,232 | 653 | 13.4 | 485.3 | 0.06 | 80.0 | 40.0 |
| Des Moines Lobe | 824,612 | 648 | 10.1 | 616.6 | 0.02 | 83.4 | 31.6 |
| Prairie Coteau | 1215,080 | 646 | 9.7 | 1184.8 | 0.07 | 88.4 | 41.1 |
| Missouri Coteau | 524,552 | 484 | 3.0 | 1369.7 | 0.11 | 96.9 | 75.1 |
| Drift Plains | 1892,710 | 507 | 5.1 | 893.6 | 0.12 | 96.7 | 75.5 |
| Devils Lake | 443,718 | 507 | 1.8 | 2092.0 | 0.18 | 99.3 | 51.9 |
Non-channel connected NWI wetlands are NWI wetlands that do not intersect the NHD stream buffer