Factor analysis of drainage basin properties: Evidence for stream abstraction accompanying the degradation of relief


  • Athol D. Abrahams


Factor analyses are carried out on five parameters measured in third order basins in five landscapes in eastern Australia: basin area, stream length, basin relief, basin perimeter, and stream number. A comparison of the factor solutions for the five landscapes suggests that departures from topological randomness are associated with the evolutionary decline of relief. Regressions between the geometric mean bifurcation ratio and relief indicate that very small headwater streams have been abstracted from the drainage networks in the two landscapes where relief has been erosionally reduced below 200 feet.