| Title | Red River Valley, Manitoba: the geomorphology of a low-relief, flood-prone prairie landscape |
| |
| Author | Brooks, G R |
| Source | Landscapes and landforms of western Canada; by Slaymaker, O (ed.); World Geomorphological Landscapes 2017 p. 143-155, https://doi.org/10.1007/978-3-319-44595-3 10 |
| Year | 2017 |
| Alt Series | Earth Sciences Sector, Contribution Series 20140365 |
| Publisher | Springer |
| Document | book |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Manitoba |
| Area | Red River |
| Subjects | surficial geology/geomorphology; hydrogeology; Nature and Environment; Science and Technology; surface waters; rivers; physiography; drainage; sediments; glacial deposits; clays; glacial lakes; floods;
Lake Agassiz; Red River Floodway; glaciolacustrine sediments |
| Program | GSC Northern Canada Division |
| Released | 2016 12 02 |
| Abstract | Located between the Manitoba Escarpment (known as the Pembina Escarpment in North Dakota) and a gentle topographic rise to late Quaternary glacial deposits, the Red River valley forms the southern
extension of the Manitoba Lowlands. The dominant landform of the central valley is a low-relief clay plain composed of glacilacustrine deposits that accumulated in glacial Lake Agassiz. The north-flowing Red River is a low-energy, suspended sediment,
mud-dominated, meandering stream that occupies a shallow stream-cut valley within the low-relief clay plain. Sedimentation along the convex banks of the meanders occurs as overbank and oblique accretion deposits. Significant sedimentation also occurs
along the concave banks on the slopes of elongated zones of low-angled earth slides that are common along the river meanders between at least Emerson and St. Adolphe, Manitoba. The Red River is well known for its broad, slow-onset, spring floods. An
array of artificial landforms have been constructed to mitigate the flooding hazard, ranging in scale from elevated pads and small ring dykes protecting isolated buildings, large ring dykes protecting towns, and the 48-km Red River Floodway that
protects Winnipeg. |
| Summary | (Plain Language Summary, not published)
The Red River valley forms the southern extension of the Manitoba Lowlands. Located between the Manitoba Escarpment and a slight topographic rise to
late Quaternary glacial deposits, the dominant landform of the central valley is a flat clay plain that was once the bed of glacial Lake Agassiz. The Red River is a low-energy, suspended-sediment, mud-dominated, meandering stream that occupies a
shallow stream-cut valley along the majority of its course. The Red River is well known for its broad, slow-onset, spring floods. An array of artificial landforms have been constructed to mitigate the flooding hazard, ranging in scale from elevated
pads and small ring dyking protecting isolated buildings, to large ring dykes protecting towns, and the 48-km-long Red River Floodway that protects Winnipeg. |
| GEOSCAN ID | 295657 |
|
|