Figure 9. Regression of the seven post-1930 flood levels, in feet asl, at the marker post near the scenic overlook at Great Falls Park against the discharge, Q in 1000 cubic feet per second (1000 ft3/s), as recorded at the Little Falls Gauge Station. Dashed line shows the relation that would obtain if 20 percent of the space between 140 ft and 146 ft were occupied by rocks. |