Fig. 5: Comparison of overall fragment density and of medium dam frequency.
From: The evolution of dam induced river fragmentation in the United States

Fragment density as a function of fragment length caused by all dams over time where PD is pre-development (a, c, e, g). Fraction of total fragments caused by medium dams over time (1-number of fragments from large dams/number of fragments from all dams) (b, d, f, h). Data are grouped by major river basin. The scale changes with fragment length.