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Xlll Figure 3.8 Graph of peak flows of the Colorado River at Hot Sulphur Springs, mean annual flows, and the mean hydrograph---- 40 3.9 Graph of peak flows of the Colorado River above Glenwood Springs, mean annual flows, and the mean hydrograph----41 3.10 Graph of peak flows of the Colorado River near Cameo, mean annual flows, and the mean hydrograph_______________ 43 ...;.1 .. 3.11 Flow duration curve for the Colorado River near Cameo-_A5 ~.~.1 -, J J I 1 J J J J J 3.12 Graph of peak flows of the Colorado River near the CO-UT State line_ --------------49 3.13 Graph of peak flows of the Gunnison River near Grand Junction, mean annual flows, and the mean hydrograph---50 4.1 Map of main channel, islands, and side channel/backwater areas- ______________________58 4.2 Example of historic channel change in the Grand Valley----64 4.3 Changes in instream water, island, and side channel /backwa ter area between 1937 and 1993---------------- 66 4.4 Changes in instream water, island, and side channel/backwater area between 1954 and 1968---------------- 69 5.1 The backwater at site 2_______________________________________________75 5.2 Map of the study area and backwater sites-_______________________77 5.3 Hydrographs at the Cameo and CO-UT State line gauges in 1993, 1994, and 1995__________________________________________________----78 5.4 Flood frequency curves for the Colorado River near Cameo and the CO-UT State line gauge-----------------_____________________80 1 . J 5.5 Cross-sections at sites 1,2, and 3-----------------------------_________83