WWRC 97-05jj
Changes in Channel Morphology and Riparian Mosaics on the Big Horn River, Wyoming
Abstract
Three sets of aerial photographs (1954, 1975, and
1989) of the Big Horn River floodplain between
Thermopolis and Worland, Wyoming, were analyzed
and compared to determine temporal and spatial
trends in channel characteristics and the riparian
mosaic. Since flow regulation by Boysen Dam in
1952, the river morphology and riparian mosaic have
changed. Channel width and area of active channel
have decreased, but there has been no change in
channel sinuosity. Changes in riparian mosaic
included decreases in the riparian herbaceous plant
community and non-vegetated bar areas, and
increases in the amount of agricultural land and
woody species canopy cover.
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