Fig. 1. Development of surface cover after the 1960 fire in watersheds with native chaparral vegetation and those that underwent the high-density perennial and barley (HDPB) treatment. Canopy surface cover was measured from 1961 through 1964 (Corbett and Green, 1965). Chaparral provided more cover in the years immediately after the fire. The barley from the HDPB treatment did not return after the fourth year. Surface cover data averaged for watersheds examined in this study show that canopy cover for each vegetation type reached 65% (Williamson et al., 2004).