Table 2 Three rivers compared by history of modifications
Modification | Wabash River | Illinois River | Ohio River |
|---|---|---|---|
Recent land-use | Agriculture | Agriculture | Mixed agriculture and forest |
Hydrologic alterations | Monthly magnitude, high- and low-pulse frequencies, minimum flows, fall rate | Monthly magnitude, 3-day, 7-day, and 30-day minimum duration; 30-day and 90-day maximum duration; high-pulse duration, rise rate, fall rate | Monthly magnitude, duration, high- and low-pulse frequencies, fall rate, rise rate |
Invasive species effects | Minor: bigheaded carps | Major: bigheaded carps | Minor: bigheaded carps |
Native fish recovery since CWA | Strong | Strong | ? |