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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 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.
Forms for Farmers, Ranchers and Landowners. Applications for NRCS conservation programs are ranked and funded at key times throughout the year. Find ranking dates for your state.
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
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.
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Now Natural Resources Conservation Service (NRCS) "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.
