The use of natural stream characteristics for stream rehabilitation works below the Manitoba escarpment / Robert Newbury and Marc Gaboury.
Material type:
TextPublication details: McCreary, MB : Wilson Creek Experitmental Watershed, Manitoba Department of Natural Resources, 1987.Description: 21 (13) p. : ill. , maps ; 28 cmOnline resources: Abstract: The channelization and extension of stream channels to drain wetlands on the western edge of the flat glacial Lake Agassiz plain in south-central Manitoba (Figure 1) has caused two major types of stream instability to occur: in the upper reaches, a series of dramatic canyons have been eroded through alluvial fan deposits that lie along the foot of the Manitoba escarpment; while in the lower reaches, meandering stream channels have been straightened and enlarged to increase their flood discharge capacity, causing downcutting and bank instability. For example, in the 2,064 square km Turtle River basin that lies on the Lake Agassiz plain adjacent to the Riding Mountain portion of the escarpment (Figure 2), over 600 square km were directly connected to the downstream drainage network by excavating channels across alluvial fans to headwater stream on the escarpment.
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Includes bibliographical references (p. 18-21).
The channelization and extension of stream channels to drain wetlands on the western edge of the flat glacial Lake Agassiz plain in south-central Manitoba (Figure 1) has caused two major types of stream instability to occur: in the upper reaches, a series of dramatic canyons have been eroded through alluvial fan deposits that lie along the foot of the Manitoba escarpment; while in the lower reaches, meandering stream channels have been straightened and enlarged to increase their flood discharge capacity, causing downcutting and bank instability. For example, in the 2,064 square km Turtle River basin that lies on the Lake Agassiz plain adjacent to the Riding Mountain portion of the escarpment (Figure 2), over 600 square km were directly connected to the downstream drainage network by excavating channels across alluvial fans to headwater stream on the escarpment.