TR-55


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TR-55

(TRansistor-1955) Sony's first transistorized radio. Introduced in 1955, the TR-55 and all the other small, portable radios that followed helped rock and roll to flourish, because teenagers could listen to their favorite music wherever they congregated.
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HydroCAD Software Solutions LLC -develops Hydrology & Hydraulics software for use by Civil Engineers, including the HydroCAD Stormwater Modeling System, which provides easy TR-20, TR-55, SBUH, and Rational hydrology, plus TC calculations, pond storage, and pond and reach routing, in an interactive graphical environment.
Known as Technical Release 55 (TR-55), the model is the most widely used for this application in the U.S.
In addition, hydraulics can be determined with the SCS modified rational method, TR-55. Or, users can paste in their own hydrographs from Excel.
Don Woodward, national hydraulic engineer at the Natural Resources Conservation Service, is one of the authors of TR-55, the stormwater model embedded in CITYgreen.
Hydrology models in common use, such as TR-55, provide satisfactory estimates of runoff in most geologic regions and within the parameters of the models.