Figure 6: Potential impacts of dams on the downstream continuum, illustrated by modifying Figure 1. The two scenarios modelled correspond to Scenario 3 and Scenario 6 in Table 3. (a) One dam in the upper third of the catchment, with undammed tributaries and a hydrological regime where bankfull flows are reduced in frequency, and all floods less than 1 in 20 years are eliminated. (b) Two dams; one located in the upper third, as in A, and a second dam on the floodplain. In this scenario, the dams modify the hydrological regime such that flows are held at near bankfull for approximately one-third of the year, and all floods less than 1 in 10 years are eliminated. Tributary inputs are also regulated by dams.