Handbook for Predicting Stream Meander Migration and Supporting Software (2004) / Chapter Skim
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47 8.1 INTRODUCTION This chapter provides the user with illustrated examples of the application of the comparison techniques described in Chapters 5 and 7. This chapter begins by allowing the user to conduct an initial screening and classification of several streams.
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and predicting the potential position of the channel in the future.
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49 TABLE 8.1 Classification of streams shown in Figure 8.1 Stream Number Location Classification 1 Smokey Hill River near Chapman, KS G2 2 Cimarron River near Fairview, OK F 3 Pee Dee River Near Peedee, SC B1 4 Licking River near Romey, KY A 5 Sacramento River near Butte City, CA D 6 Henrys Fork River near Rigby, ID Braided 7 Sacramento River near Butte City, CA C 8 Saline River near Tescott, KS G1 9 Little Pee Dee River near Galivants Ferry, SC E 10 Neches River near Evadale, TX B2 11 Altamaha River near Darien, GA Anabranched Figure 8.1. (continued)
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50 Figure 8.2. Two sheets showing U.S.
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51 Figure 8.4. Aerial photograph obtained from the USGS of the Sacramento River near Butte City, California, in 1998.
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the 1998 banklines and registration points delineated) as shown in Figure 8.10.
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53 Figure 8.6.
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54 Figure 8.7. California Department of Water Resources 1972 aerial photography of the Sacramento River Valley near Butte City, California.
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55 Figure 8.8. Overlay and comparison of the 1937 and 1972 banklines and common registration points on the 1972 aerial photography.
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56 Figure 8.9. Aerial photograph of the Sacramento River near Butte City, California, showing the bankline positions of the river in 1998.
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57 Figure 8.10. Overlay and comparison of the 1937 (blue)
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58 Figure 8.11. Circles of known radius of curvature fitted to the 1937, 1972, and 1998 outer banklines (dotted lines)
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59 Figure 8.12. Delineation of the bankline radii of curvature (RC1, RC2, and RC3)
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60 Figure 8.13. Prediction of bend migration for the period from 1998 to 2028 and the predicted position of the outer bank of the bend in 2028.
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61 Based on past channel configurations, the predicted channel banklines for the year 2028 can be drawn and then superimposed on the 1998 aerial photo. The predicted channel banklines for the year 2028 can be drawn based on past channel configurations and then superimposed on the 1998 aerial photo (see Figure 8.14)
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TABLE 8.2 Frequency calculations for Sacramento River example 25 50 75 90 95 Cumulative Percent Extension C Sites (channel widths/yr) 0.0011 0.008 0.018 0.032 0.045 x 1,000 ft width (ft/yr)
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63 Figure 8.15. Bend movement for C Class frequencies.
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