TR-55 Hydrograph
TR-55 Hydrograph
(OP)
All,
I am new to using the TR-55 software and have a few questions. Please see below. My goal is to use the hydrograph data in the input file for HEC-1, so that I may determine storage volume. I would need to do so for the 100 year 6hr and 24 hr storm.
1. Where can I find Unit Hydrograph data for input? I am using the "standard" UH, as provided by the software.
2. Storm Data - The software only allows for rain data on the 24 hr duration storm. Can I input 6 hr rainfall data here to produce the corresponding hydrograph?
3. Once all data is input, I can run TR-55, and plot the hydrograph. Is there a way to get hydrograph data for input into the HEC-1 input file? All I am receiving is the graph, and could not find the points for the hydrograph.
Thanks very much.
I am new to using the TR-55 software and have a few questions. Please see below. My goal is to use the hydrograph data in the input file for HEC-1, so that I may determine storage volume. I would need to do so for the 100 year 6hr and 24 hr storm.
1. Where can I find Unit Hydrograph data for input? I am using the "standard" UH, as provided by the software.
2. Storm Data - The software only allows for rain data on the 24 hr duration storm. Can I input 6 hr rainfall data here to produce the corresponding hydrograph?
3. Once all data is input, I can run TR-55, and plot the hydrograph. Is there a way to get hydrograph data for input into the HEC-1 input file? All I am receiving is the graph, and could not find the points for the hydrograph.
Thanks very much.





RE: TR-55 Hydrograph
What UH data do you want to use?
Why type of 6-hour storm do you want to use? Type II or III, or something else?
I'm also curious as to why you're using TR-55 and HEC-1 together. Why not use one or the other? Or some other program that can more easily meet the needs you've outlined.
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: TR-55 Hydrograph
I am using TR-55 because I am not sure how to run HEC-1 without the inflow hydrograph. Typically, I use a software, which would provide me the inflow hydrograph for the HEC-1 Input File. However, the software is not applicable to this project location (Colorado). So I am trying to determine the inflow hydrograph data, so that I may run HEC-1 iterations, to determine detention basin sizing. I believe there are multiple HEC-1 input format available, but I am only familiar with the input format requiring the "QI" inflow hydrograph. Do I have other format options with HEC-1, that would be simpler? I have the rainfall data for this project, imperviousness, and CN number. Your feedback would be much appreciated. Thanks.
RE: TR-55 Hydrograph
In any case, the UH curve is completely independent of the (Type II) rainfall distribution. Both curves are required for the SCS/NRCS runoff method.
The Type II rainfall is normally a 24-hour duration. If a shorter version is required, your stormwater regulations should provide details on the curve.
You can probably use HEC-1, TR-55, or one of the commercial alternatives for your purposes. But using HEC-1 and TR-55 together seems unnecessarily complicated.
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: TR-55 Hydrograph
RE: TR-55 Hydrograph
Where and for what reason does FEMA "require" such matching ?
RE: TR-55 Hydrograph
"Colorado Urban
Hydrograph Procedure
(CUHPF/PC)
(May 1996 and May 2002) Denver Urban Drainage
and Flood Control District Denver Urban Drainage and Flood Control District
2480 West 26th Avenue, Suite 156-B
Denver, CO 80211 Flood hydrographs at different locations along streams. Hydrographs are routed using UDSWM2-PC (a modified version of the Runoff Block of EPA's SWMM).
Only accepted for usage and the default parameters in the model applicable within the Denver, Colorado, metro area.
Public Domain: Yes"
RE: TR-55 Hydrograph
RE: TR-55 Hydrograph