This video shows the progression of flooding in the non-tidal Delaware River River during Hurricane Irene and Tropical Storm Lee.  All data are from the US Geological Survey gages available at:

http://waterdata.usgs.gov/NJ/nwis/current?type=flow

Flow units were converted to Discharge/Drainage Area (CFS/mi2) to facilitate showing baseflow on a comparable level.  When the blue line is above the red line, the river is in flood stage at that location.