TR-55

08/08/25

“How can we use simplified procedures to estimate runoff and peak discharges in small watersheds?”

Predicting runoff and peak discharges for watersheds can be a very difficult task. There are so many factors that you have to consider without great precision.  However, for small watersheds in the US, the Natural Resources Conservation Service of the U.S. Department of Agriculture has developed a procedure called TR-55 to handle these. TR-55 uses empirically derived data and hydrological modeling to determine runoff and peak discharges.