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1 <br />Table 3.2. Variables used in discriminant function analysis <br />1) Elevation above bankfull stage (continuous numeric values) <br />Source: U.S. Army Corps of Engineers topographic maps <br />2) Topographic position relative to immediate area <br />Source: 1996 aerial photographs, USACE topographic maps <br />1 = enclosed depression <br />2 = bar (i.e., floodplain adjacent to or in river channel) <br />3 = terrace <br />4 = upland (i.e., dry areas located away from river channel or <br />enclosed depression) <br />3) Type and age of flood deposit <br />Source: map developed by John Mayers of Utah State University <br />1 = active channel deposit <br />2 = semiactive channel deposit <br />3 = river terrace <br />4 = river terrace/floodplain i <br />5 = modified river terrace/floodplain <br />4) Presence or absence of levee completely enclosing the site <br />Source: 1996 aerial photographs <br />1 = yes <br />2=no <br />5) Distance to water in an enclosed depression (continuous numeric values) <br />Source: 1996 aerial photographs <br />6) Distance to river at bankfull stage (continuous numeric values) <br />Source: 1996 aerial photographs, USACE topographic maps <br />7) Distance along a meander wavelength <br />Source: 1996 aerial photographs <br />1 = Beyond inflection point on convex bank <br />2 = Point bar region on convex bank <br />3 = #2 region to inflection point on convex bank <br />4 = #3 to beginning of bend on concave bank <br />5 = #4 to midpoint of bend on concave bank <br />6 = #5 to end of bend on concave bank (region <br />where scouring is typically greatest) <br />7 = #6 to inflection point (#1) <br />8) Vegetation type (output variable) <br />Source: Field data and 1996 aerial photographs <br />1= presence of giant whitetop <br />2 = absence of giant whitetop <br />\ <br />25