Fig. 8. Structural variables compared with maximum water content (_max) and Rossi–Nimmo (1994) fit parameters (_o and ). Scatter plots show comparisons with (a, d, g) bulk density (_b); (b, e, h) trapped air fraction of porosity (A_e); and (c, f, i) porosity-based randomness index (_s), for n = 10 samples. Symbols indicate sample categories of Fig. 3, with results for individual samples listed in Table 3. Solid symbols represent fluvial samples and open symbols represent debris flow samples.