Abstract 



Describes a computer program (Fortran IV 

 language) designed to analyze hydrographs. 

 Using only input data of stage and time, the 

 program automatically determines the begin- 

 ning and end of each event, analyzes each 

 event with respect to all its hydrologic charac- 

 teristics (including a partitioning of base flow, 

 interflow, and rapid flow), and then prints a 

 detailed analysis of each event and a series of 

 summaries of all events analyzed. The hydrol- 

 ogist can influence the results only by chang- 

 ing the time interval between hydrograph 

 readings. The method has been tested on both 

 simple and complex hydrographs representa- 

 tive of runoff events in many regions of the 

 United States. 



