Hydrographs

Using the TR-55 tabular hydrograph method (see TR-55 reference manual for details), hydrographs for a selected basin or outlet may be computed. The Compute Hydrograph(s) button is chosen once all of the necessary input for basins and outlets have been entered and a new set of hydrographs will be computed.

If you have a basin selected when you compute hydrographs, then a hydrograph for only the selected basin will be computed. However, if you have an outlet selected when you compute hydrographs, then a new hydrograph for each upstream basin will be computed along with the routed hydrographs at outlet points.

You may notice a slight difference between hydrographs computed by WMS-TR-55 implementation and those in the TR-55 reference manual. This difference occurs because the Ia/P value is rounded to the nearest hydrograph value for the standard version of TR-55. In WMS hydrographs are determined by linear interpolation between two hydrographs using the actual Ia/P value.

Related Topics:
TR55 Overview