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<br /> <br /> <br />'~ 'Mf' <br /> <br />i iT <br /> <br />r;". <br />-J:;; <br />,'" <br /> <br />'f; <br /> <br />t\(j <br /> <br />'if: <br /> <br />Figure 7. Saltcedar that was little affected by flow primarily because of the relatively low <br />ratio of flow depth to vegetation height. <br /> <br /> 14 <br /> 12 <br />>- <br />L1J 10 <br />L1J <br />U. <br />;!; <br />::t <br />II: 8 ~~ <br /><( <br />>- ~~ <br />z fY~~~~ <br />L1J <br />:; <br />0 6 I <br />:; I <br /> I <br /> I <br /> 4 I <br /> cJ <br /> 2 <br /> 0 20 <br /> <br />_--0 <br />----- <br />--- <br />".".--- ---~:i:umference <br />". <br />". <br />,,/ <br />". <br />". <br />". <br />". <br /> <br /> <br />/ Moment Arm <br /> <br /> <br />80 <br /> <br />100 <br /> <br />40 <br /> <br />60 <br />FORCE, IN POUNDS <br /> <br />*' <br /> <br />0.50 <br />0.45 <br />0.40 >- <br /> L1J <br /> L1J <br /> u. <br />0.35 ;!; <br /> W <br /> u <br />0.30 z <br />L1J <br /> II: <br /> L1J <br /> u. <br />0.25 :; <br />=> <br /> U <br /> II: <br />0.20 ti <br />0.15 <br />0.10 <br />120 <br /> <br />Figure 8. Relation between moment arm and the force required to bend vegetation to 450 past vertical. <br />Circumference was measured at the immediate location in which the dynamometer was placed. A 15-foot-tall <br />saltcedar was used for this example. <br /> <br />Data Collection and Analysis 15 <br />