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ensure accuracy. Restoration of Aquatic Ecosystems: Science,
Technology, and Public Policy Another way in which the character
of rivers is drastically altered is by cutting off interactions
with the riparian zone and floodplains. This may be done
directly, by channelization and leveeing (Kissimmee, Illinois,
and Mississippi rivers), and indirectly, by regulating the flood
regime (navigation dams on the Mississippi). According to the
American Rivers Conservation Council (Echeverria et al., 1989),
of approximately 3.2 million miles of rivers in the United
States, 2.9 million miles remain undammed, while 600,000 miles
of river are dammed. The committee could not find a recent
national assessment of the number of stream and river miles
affected by channelization or leveeing, but the total is
probably much greater than the number of m