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175 <br />150 <br />125 <br />100 <br />E 75 <br />w <br />0 50 <br />25 <br />0 <br />0 <br />c <br />a 175 <br />N <br />a 150 <br />U <br />r- 125 <br />0 <br />CL 100 <br />CO <br />75 <br />50 <br />25 <br />0 <br />3 <br />Cn <br />U <br />O <br />L <br />L <br />w <br />0 <br />m <br />CO <br />a? <br />Riffles <br />Stratum 9 <br />t DTE 1996 H DTE 1997 -w D-501996 8 D-50 1997 <br />Jun Jul Aug Sep uct <br />Stratum 8 <br />Jun Jul Aug Sep act <br />Stratum 9 ®Stratum 8 <br />2 <br />0 I-,--1 <br />6/13 6/27 7/10 8/15 8/29 9/17 10/10 6/25 7/1 7/9 8/28 9/24 <br />1996 Date 1997 <br />Figure 8. Mean total depth-to-embeddedness (DTE) and mean particle size (D-50) through <br />time in riffles in Stratum 9 (top) and Stratum 8 (middle), and mean relative DTE through time <br />in riffles in each stratum (bottom). <br />1 <br />22