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Arkansas River Valley
The Ozarks and Ouachitas are separated by the broad trough of the Arkansas River Valley. This region includes the alluvial valley of the Arkansas River, as well as bottomlands and terraces associated with tributary streams, and other landforms that occur within the portion of the Ouachita Mountains that drains to the Arkansas River. The northern boundary of the Region is the southern limit of the Boston Mountains. Consequently, this region includes wetlands similar to those of the lowlands, as well as elements of mountain wetland systems. However, intensive agricultural development on the fertile terraces and river bottoms, and navigation projects on the Arkansas River have altered or eliminated many historic wetlands.

Representatives of all of the wetland classes occur within the Arkansas River Valley. Read about Wetland Classification, or find information on specific wetland classes that occur in the Arkansas River Valley:

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