Flow Frequency and Channel Capacity (IMAGE) University of California - Santa Barbara Caption Sites where flow frequency and channel capacity effects reinforce and offset one another are indicated by filled and open circles, respectively. Red represents net increases and blue net decreases in flood hazard frequency. Credit UCSB Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.