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<br />Figure 16. Graphs showing bed elevation at the Lees Ferry gage. A. Time series of minimum bed elevation for the <br />Upper Cableway between 1921 and 1966. Also plotted are Bureau of Reclamation and GCMRC surveys of cross- <br />section R-1, which is the same location as the Upper Cableway, between 1956 and 2000. B. Time series of minimum <br />bed elevation for the Lower Cableway between 1929 and 1957. Figure from Grams et al. (2004, fig. 12, 13). <br /> <br />960 <br /> <br />955 <br /> <br />J.~i;;j~'t'~~ '*""'OO~;;;~.:~: ~~~""l' m~,il:'~;) ~, <br />,~ !:~ I W~. i :: I r:r J; <br />" '/"'J jilf. . '. ...... <br />, r' II ,..' <br />! <br /> <br />water surface elevations <br />(Range 1 surveys) <br /> <br />C/') <br />0:: <br />w <br />f- <br />W <br />~ <br />Z <br /> <br />Z <br />o <br />f= <br />~ <br />W <br />...J <br />W <br /> <br />950 <br /> <br />1965 scouring event <br />/ <br />/ <br /> <br />/ minimum bed elevations <br />(Range 1 surveys) <br /> <br />945 <br /> <br /> <br />i <br />~ <br />I:: <br /> <br />940 <br /> <br />minimum bed elevations (discharge measurements) <br /> <br />II <br /> <br />cable-gage hI. measured <br />cable-gage hI. calculated <br /> <br />935 <br />1/1/21 <br /> <br />1/1/51 <br /> <br />1/1/61 <br />DATE <br /> <br />1/1/71 <br /> <br />1/1/81 <br /> <br />1/1/91 <br /> <br />1/1/31 <br /> <br />1/1/41 <br /> <br />960 <br /> <br /> <br />955 <br /> <br />water surface elevations (discharge measurements) <br /> <br />water surface elevation <br />(GCMRC surv~y) <br />'-. <br /> <br />C/') <br />0:: <br />w <br />f- <br />~ 950 <br />z <br />z <br />o <br />f= <br />~ <br />W <br />...J <br />W <br /> <br />t <br /> <br />i. l* it~f It fi <br /> <br />+ <br /> <br />t i <br />J! '- <br /> <br />t <br />i <br />+ <br /> <br />" <br />i <br /> <br />+ <br /> <br />945 <br /> <br />a <br />o <br />o 0 <br />"0 <br /> <br />18 tl ~~ii i~ e~ g~i ~ <br />.... r. .~ <br />.' .".' <br />B <br /> <br />I <br /> <br />940 - <br /> <br />.............. <br /> <br />minimum bed elevations (discharge measurements) <br /> <br />minimum bed elevation <br />(GCMRC survey) <br /> <br />935 .,., <br />1/1/21 <br /> <br />If 1 I I 11 I t I II .1. I I I 1 I 1 I f II 1111 I I I I II II I I I. I I I. I.' . I. <br /> <br />.. I. I II I 1 <br /> <br />1/1/81 <br /> <br />1/1/91 <br /> <br />1/1/61 <br />DATE <br /> <br />1/1/71 <br /> <br />1/1/31 <br /> <br />1/1/41 <br /> <br />1/1/51 <br /> <br />26 System-wide Changes in the Distribution of Fine Sediment in the Colorado River Corridor... <br /> <br />. <br /> <br />A. <br /> <br />('. <br /> <br />83 <br /> <br />1/1/01 <br /> <br />. <br /> <br />B. <br /> <br />", <br />'- <br />'-. <br /> <br />>~ <br />() <br /> <br />....... <br /> <br />EE <br />:r <br />./ <br /> <br />1/1/01 <br /> <br />. <br />