Technical Release 55 Urban Hydrology for Small Watersheds Chapter 4 Graphical Peak Discharge MethodGraphical Peak Dischage Method This chapter presents the Graphical Peak Discharge method for computing peak discharge from rural and urban areas The Graphical method was developed from hydrograph analyses using TR, "Computer
Tr-55 tabular method- Grilamid TR® 55 Natural is a high purity transparent polyamide 12 (PA 12) grade based on aliphatic and cycloaliphatic monomers Possesses very high flexural fatigue strength, high colorability, good stiffness, good toughness even at low temperatures and good dimensional stability Provides clear transparency even in high wall thicknesses, goodDetention Pond Sizing TR55 Method This command calculates the runoff and storage volumes for a detention pond The program uses the method from the TR55 program as described in the Urban Hydrology for Small Watersheds manual The command is
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The proce dures in TR55 can be used to determine the peak flow upstream of the culvert Detailed storage routing procedures should be used to determine the outflow through the culvert Example 31 The sketch below shows a watershed in Dyer County, northwestern Tennessee The problem is to compute T cat the outlet of the watershed (point D)ZAll use either TR55 or TR methodology (Use weighted CN's, Tc calculation method of sheet, shallow concentrated, and channel flow) zAll use the storageindication method for detention storage routing zMost provide a drainage diagram zAll allow for printout of elevationareacumulative volume analysis of detention storage
Incoming Term: tr 55 method, tr-55 tabular method, tr-55 vs rational method, tr-55 graphical peak discharge method,
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