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2 Μαΐ 2016 · Technical Release 55 (TR-55) Urban Hydrology for Small Watersheds was first issued in January 1975 as a simplified procedure to calculate the storm runoff volume, peak rate of discharge, hydrographs and storage volumes required for storm water management structures (SCS, 1975).
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
30 Νοε 2023 · 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.
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 .
Download: Small Watershed Hydrology (WinTR-55) 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.
Soil name and hydrologic group (Appendix A) Table 2-2. CN 1/. Fig. 2-3 Fig. 2-4 Product of CN x area. Area acres mi2 %. Cover description ( Cover type, treatment, and hydrologic condition; percent impervious; unconnected/connected impervious area ratio) 1/ Use only one CN source per line. Totals =. CN (weighted) = total product = total area.
