ERTH 2415 Lecture Notes - Lecture 22: 1997 Red River Flood, Laurentide Ice Sheet, Red River Floodway
26 Apr 2016
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Document Summary
Red river, manitoba: flood history, floods characteristics, and coping with its floods. Important in understanding the flooding problem: glacial legacy. Within the red river valley, the laurentide ice sheet blocked the drain. Below the red river valley is a clay plain. This clay forms a very flat landscape. Red river: is a meandering river (flows back and forth) Low gradient (~7 cm per km) which is very small compared to other rivers. Occupies a shallow valley (up to 15 m deep) Stream cut valley = the narrow valley the river flows in. Over 200 years of flood records for the red river. There was a major flood (the largest to occur in 50 years) in 1950. Evacuation about half the city of winnipeg. Evacuate small communities out of south of winnipeg. Flood waters can be many meters around the river edge. Flooding was seen up to 40km away from the river. Flood is a flow and not a lake.
