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SHCR varied between wide and narrow reaches (fig. 13). The mean SHCR value for narrow <br />reach sites (-0.467) was significantly lower than the mean SHCR of wide reach sites (0.297; p <br />= 0.025). Most study sites in narrow reaches displayed negative values for both SHCR and <br />antecedent SHCR, whereas sites in wide reaches revealed a wide range of values for both SHCR <br />and SHCR. Sites in narrow reaches are characteristically smaller in area and displayed steep <br />faces with relatively little mid-elevation bar platform development. In contrast, sandbars in <br />wide reaches generally contained broad mid-elevation bar platforms. <br />This preliminary hypsometric analysis demonstrates that the hypsometry can be used to detect <br />changes in sandbar morphology through time and that the antecedent SHCR predicts <br />subsequent bar morphology. Sandbar morphology exists across a rather well-defined range, <br />with sites in narrow reaches typically having near neutral or negative morphologies in relation <br />to the system mean. Sites in wide reaches typically have larger bar platform areas at middle <br />stage elevations. Because of this difference, this analysis should be repeated using a different <br />best-fit hypsometric curve for wide and narrow reaches. In addition, individual sites displayed <br />a cyclic pattern of aggradation and degradation that was highlighted by the SHCR analysis. <br />1 <br />? 0.2 <br />x 0 <br />-1 <br />Wide Narrow <br />Figure 13. - Distribution of SHCR in wide versus narrow reaches. <br />21