Handbook for Predicting Stream Meander Migration and Supporting Software (2004) / Chapter Skim
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Pages 75-86
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From page 75... ...
B-1 Identifying and delineating banklines is often dependent on the physical scale of the channel, the scale of the aerial photo on which the bankline is being delineated, the resolution and sharpness of the photo, and the density of the vegetation along the bankline. On good quality aerial photos, bankline features are more easily identified on large channels than on small channels.
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B-2 Figure B.1. The Ouachita River during low flow near Arkadelphia, Arkansas: (a)
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B-3 Figure B.2. The Wabash River during high flow near Newport, Indiana: (a)
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B-4 Figure B.3. The Big Black River during low flow near Bovina, Mississippi: (a)
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B-5 Figure B.4. The English River near Kalona, Iowa.
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B-6 Figure B.5. The Hatchie River near Sunnyhill, Tennessee, during high flow: (a)
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B-8 Figure B.7. The Monroeville Bend on the Sacramento River near Ord Ferry, California, showing delineated banklines, sloughs (S)
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In addition, the outer bank may be very irregular because of massive geotechnical failures or rapid retreat in areas where there are highly variable bank sediments. When this occurs, the bankline should be delineated as accurately as possible, but a circle that best describes the entire bankline should be used to identify the outer bank radius (Figure B.10)
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B-10 Figure B.10. Aerial photo of the Sacramento River in California showing the location of the delineated bankline (solid yellow line)
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B-11 Figure B.11. Idealized meandering channel showing the hypothetical position of riffles (R)
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B-12 Figure B.13. Aerial photo of the sand-bed Wapsipinicon River in Iowa showing the locations of several crossings identified by the circles.
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