| Monitoring the 1997 flood in the Red River Valley using hydrologic regimes and RADARSAT imagery.: An article from: The Canadian Geographer | Digitalby Bradley A. Wilson (Author), Harun Rashid (Author)
| List Price: | $5.95 | | | Available: | Available for download now |
| | Binding: | Digital | | Publisher: | Canadian Association of Geographers | | Page Count: | 17 Pages | | Publication Date: | March 22, 2005 |
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This digital document is an article from The Canadian Geographer, published by Canadian Association of Geographers on March 22, 2005. The length of the article is 4877 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.From the author: In this study, we attempt to relate hydrologic regimes of the 1997 flood in the Red River Valley to the areal extent of flooding, determined from RADARSAT imagery. We obtained ten scenes of RADARSAT imagery, from 27 April to 1 July, including bitmaps delineating flooded areas for each date, from the Manitoba Centre of Remote Sensing. These images were co-registered using an image-to-image registration process. By overlaying these flood maps in chronological order, we compared the areal extent of flooding with the hydrologic regimes of the Red River, expressed as relative depths of flooding above the bankful stage at selected gauging stations. The results of the study indicated that the area of flooding on 4 May (1,984 [km.sup.2]) corresponded well with the highest flood levels at several gauging stations. A previous scene on 27 April showed a larger area under water, but visual inspection of the processed imagery indicated a lack of conformity between flood level regimes and the areal extent of flooding on this date due to surface detention of pre-flood storm runoff. Thus, the RADARSAT imagery represented the flood regimes adequately only when its interpretations were combined with hydrologic analysis and visual inspection of surface characteristics of the floodplain.Citation DetailsTitle: Monitoring the 1997 flood in the Red River Valley using hydrologic regimes and RADARSAT imagery.Author: Bradley A. WilsonPublication: The Canadian Geographer (Refereed)Date: March 22, 2005Publisher: Canadian Association of GeographersVolume: 49 Issue: 1 Page: 100(10)Distributed by Thomson Gale |
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