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<br />z 28 <br />o <br />~ <br />G; 26 <br />....J <br />w- <br />~.s <br />~ 24 <br />I- <br />m <br />a:: <br />< 22 <br /> <br />-' <br />< <br /> <br />,.' <br /> <br />30 A <br />~~r---~: <br /> <br />30 <br /> <br />--"~1 <br /> <br />B <br /> <br />/ COTTONWOODS <br />SALTCEDAA AND RUSSIAN OLIVES <br /> <br /> <br />20 <br />o <br /> <br /> <br />20 <br /> <br />40 <br /> <br />100 <br /> <br />120 <br /> <br />140 <br /> <br />60 <br /> <br />80 <br />DISTANCE <br />(m) <br /> <br />Figure 8. Plots of ferry and cableway cross section used by the U.S. Geological Survey prior to 1930, shown without vertical exaggeration (A) and <br />with approximately 6x exaggeration (B). The thick solid line is the cross section surveyed in spring 1997, the thin line is from May 1928, and the dot- <br />ted line is from June 1912, as detennined from discharge measurement data. Note that very little change occurred in width between 1912 and 1928. <br /> <br />J;: <br /> 7 <br /> 6 <br />z 5 "- <br />0 <br />~ 4 <br />> <br />W <br />....J 3 <br />w- <br />)-E <br />a::~ 2 <br /><( <br />a:: <br />I- <br />m <br />a:: <br /><( 0 <br /> -1 B <br /> -2 <br /> 160 140 120 <br /> <br />~p <br /> <br />i "" r 1l""""1l"""' " i I! r'-"'~ -'-- .A., <br /> <br />1 <br /> <br /> <br />1932 <br /> <br />100 <br /> <br />80 <br /> <br />60 <br /> <br />40 <br /> <br />20 <br /> <br />o <br /> <br />POSITION ON CABLEWAY <br />(m) <br /> <br />Figure 9. Changes in channel cross section between 1932 and 1995 at the present cableway, without vertical exaggeration (A) and with exag- <br />geration (B). Note the deposition that has occurred on the right bank since 1932. The dotted box indicates the approximate area shown in greater <br />detail in Figure 14. <br /> <br />1766 <br /> <br />Geological Society of America Bulletin, December 1999 <br />