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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.
TR 55 Worksheet 3: Time of Concentration (T c) or Travel Time (T t) Project: Designed By: Date: Location: Checked By: Date: Circle one: Present Developed Circle one: T c T t through subarea NOTES: Space for as many as two segments per flow type can be used for each worksheet. Include a map, schematic, or description of flow segments. ...
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.
U.S. Department of Agriculture FL-ENG-21C Natural Resources Conservation Service 04/04 Tr 55 Worksheet 4: Graphical Peak Discharge Method
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.
