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Technical Release 55 (TR-55) presents simplified procedures for estimating runoff and peak discharges in small watersheds. In selecting the appropriate procedure, consider the scope and complexity of the problem, the available data, and the acceptable level of error. While this TR gives special emphasis to urban
3 Απρ 2003 · TR-55 has since been upgraded for use on a computer, but still has the limitations. We use HydroCAD. It is a moderately priced package with an easy to use GUI interface. HydroCAD can be configured to use the TR-20, SBUH or Rational runoff methodology.
Technical Release 55 (TR-55) presents simplified procedures to calculate storm runoff volume, peak rate of discharge, hydrographs, and storage volumes required for floodwater reservoirs. These procedures are applicable in small watersheds, especially urbanizing watersheds, in the United States.
How to get it: You can download the TR-55 Manual here. (2MB PDF format) You can download the complete software and documentation from the NRCS Tech Tools. For additional background information on the TR-55 calculations please see Understanding Hydrology or the "Hydrology" section of the training materials. How it compares to HydroCAD:
The WinTR-55 user manual (NRCS 2002a) covers the procedures used in and the operation of the WinTR-55 computer program. Part 630 of the Natural Resources Conservation Service (NRCS) National Engineering Handbook provides detailed information on NRCS hydrology and is the technical reference for WinTR-55.
19 Ιουλ 2004 · WinTR-55 is a single-event rainfall-runoff small watershed hydrologic model. The model generates hydrographs from both urban and agricultural areas and at selected points along the stream system. Hydrographs are routed downstream through channels and/or reservoirs.
Technical Release 55 (TR-55) presents simplified procedures for estimating runoff and peak discharges in small watersheds. In selecting the appropriate procedure, consider the scope and complexity of the problem, the available data, and the acceptable level of error.
