Welcome to TR55GRAPH

Computation of flood peak with the SCS TR-55 Graphical Method

(c) 2001 V. M. Ponce, Version 1.0, April 13, 2001

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Enter catchment area A (km2 or mi2):   
Enter rainfall depth D (cm or in):   

Enter return period T (yr):
   
Enter curve number CN:   

Select design storm:    

Enter time of concentration tc (hr):   
Enter percentage (%) of pond areas P:   

Enter comments or description (optional).