Wetland Resources of Eastern South Dakota

Tables and Figures

Tables

Table 1 Elements of the Cowardin et. al classification system used in eastern South Dakota and NWI codes for systems, subsystems, classes, and modifiers.
Table 2 Area of wetlands by classification delineated by the National Wetland Inventory in easter South Dakota from photography acquired 1979-1986. Attribute is the NWI code for the Cowardin et. al (1979) classification.
Table 3 Area and percent of the total area of palustrine wetlands in 18 classes and mixed classes delineated by the NWI in eastern South Dakota. codes for classes are presented in Table 2. In mixed class, the most abundant class is listed first.
Table 4 Number of eastern south Dakota temporary, seasonal, and semipermanent basins by water regime and size class.
Table 5 Acres of eastern south Dakota temporary, seasonal, and semipermanent basins by water regime and size class.
Table 6 Number of eastern South Dakota permanent wetland basins by water regime and size class.
Table 7 Acres of eastern South Dakota permanent basins by water regime and size class.
Table 8 Number, acres, and percent of each county comprised of basins by water regime.

Figures

Figure 1 The glaciated prairie pothole region of eastern South Dakota was delineated using the distribution of characteristic soils.
Figure 2 The term "wetland" describes an area with a homogeneous water regime and plant community structure as delineated by the NWI. A "basin" is the depression that contains the wetlands extending upslope to the limit of the wetlands.
Figure 3 Elements of the Cowardin et al. (1979) classification system.
Figure 4 Dates of NASA and NHAP photography used by the NWI to delineate wetlands and deepwater habitats in eastern South Dakota.
Figure 5 Enlargement of a section of a National Wetlands Inventory final map.
Figure 6 Eastern South Dakota counties.
Figure 7 Eastern South Dakota physiographic regions.
Figure 8 Wetlands delineated by the NWI were converted to basins by dissolving arcs and classifying the basin's water regime by the most permanent wetland within it.
Figure 9 Approximately 2,222,113 ac (899,277 ha) of wetlands were delineated by the NWI in the 35,390 mi² (90,600km²) that comprise eastern South Dakota
Figure 10 Areas of eastern South Dakota wetlands delineated by the NWI using the Cowardin et. al (1979) system.
Figure 11 Percent of total acres of eastern South Dakota palustrine wetlands by Cowardin et. al (1979) class.
Figure 12 Percent of total acres of eastern South Dakota palustrine wetlands by water regime.
Figure 13 Percent of total acres of eastern South Dakota palustrine wetlands by special modifier.
Figure 14 Percent of total acres of eastern South Dakota lacustrine wetlands by water regime. Temporary and seasonal wetlands comprise a trace of total lacustrine wetlands by special modifier.
Figure 15 Percent of total acres of eastern South Dakota lacustrine wetlands by special modifier.
Figure 16 Distribution of riverine wetlands in eastern South Dakota. Discontinuities in river channels indicate impoundments of intervening stretches of palustrine wetland.
Figure 17 Percent of total acres of eastern South Dakota riverine wetlands by water regime.
Figure 18 Number and acres of eastern South Dakota basins by water regime.
Figure 19 Sizes of temporary, seasonal, semipermanent, and permanent basins combined.
Figure 20 Sizes of temporary basins.
Figure 21 Sizes of seasonal basins.
Figure 22 Sizes of natural semipermanent basins.
Figure 23 Sizes of basins with semipermanent water regimes due to dugout excavation.
Figure 24 Sizes of impoundments with semipermanent water regimes.
Figure 25 Sizes of natural permanent basins.
Figure 26 Sizes of basins with permanent water regimes due to dugout excavation.
Figure 27 Sizes of impoundments with permanent water regimes.
Figure 28 Distribution of basins expressed as number of basins/10 mi².
Figure 29 Distribution of basins expressed as acres of basins/10 mi².
Figure 30 Distribution of temporary basins expressed as number of basins/10 mi².
Figure 31 Distribution of temporary basins expressed as acres of basins/10 mi².
Figure 32 Distribution of seasonal basins expressed as number of basins/10 mi².
Figure 33 Distribution of seasonal basins expressed as acres of basins/10 mi².
Figure 34 Distribution of natural semipermanent basins expressed as number of basins/10 mi².
Figure 35 Distribution of natural semipermanent basins expressed as acres of basins/10 mi².
Figure 36 Distribution of semipermanent basins due to dugout excavation expressed as number of basins/10 mi².
Figure 37 Distribution of semipermanent basins due to dugout excavation expressed as acres of basins/10 mi².
Figure 38 Distribution of semipermanent and permanent impoundments expressed as number of basins/10 mi².
Figure 39 Distribution of semipermanent and permanent impoundments expressed as acres of basins/10 mi².
Figure 40 Distribution of permanent basins in eastern South Dakota.
Figure 41 Distribution of channelized streams and drainage ditches with wetland characteristics linking two or more natural basins.
Figure 42 Limits of the drift sheets of Wisconsin glaciers in eastern South Dakota. Each successive glacial advance was less extensive than previous advances (adapted from Flint 1955).
Figure 43 Eastern South Dakota U.S. Geological Survey 8-digit hydrologic units (watersheds).

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