North Carolina Water Science Center
ABOUT THE NC WATER SCIENCE CENTER
USGS IN YOUR STATE
USGS Water Science Centers are located in each state.
Duration Graphs for Selected North Carolina Stations
Duration graphs characterize the state of the hydrology of a stream with respect to time. To quantify the state of the hydrology for the current year, the current running 7-day average flows are compared to selected non-exceedance percentiles computed for each day of the year over the history of the gaging station.
To view a graph, select a station from the map shown below or from the following table.