Bankfull Cross Sectional Area to Drainage Area

A graphical regression between Bankfull cross sectional area and drainage area is typically performed on a log-log plot. Cross-sectional area is measured using techniques discussed earlier, typically at a representative riffle or some average riffle area where Bankfull is readily determined. As would be expected, Bankfull cross-sectional area typically increases with drainage area, but again, deviations exist within and between regions.