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OUTPUT : HY8 FOR CULVERT DESING
3

OUTPUT : HY8 FOR CULVERT DESING

OUTPUT : HY8 FOR CULVERT DESING

(OP)
The output of HY8 program (from HYDRAIN family of programs by FHWA)gives you the "type of flow" in the culvert for different discharge values.
For example: 1-S2n, 5-S2n, 1-M2c etc etc.
What is the significance of these short forms. Does anybody has any idea where I can find the description of these short forms used for "type of flow" in the culvert.
I am sure there must be some FHWA publication which explains this...but I couldn't find it!
Please help.

RE: OUTPUT : HY8 FOR CULVERT DESING

2
check your hydraulics text book.  Open Channel Hydraulics by Chow, McGraw-Hill describes the standard profiles.
H(2,3) is for horizontal,
M(1,2,3) is for mild slopes (subcritical)
C(1,2,3) is for critical
S(1,2,3) is for steep (supercritical)

Best, Tincan.

RE: OUTPUT : HY8 FOR CULVERT DESING

HY-8 is the computer implementation of HDS-5.  You should have this document if you are using HY-8.  It is available in pdf form at:
http://www.fhwa.dot.gov/bridge/hydsoft.htm

Terry

RE: OUTPUT : HY8 FOR CULVERT DESING

(OP)
Thanks Tincan & Terry for your replies. I do have the HDS-5....I ahve gone through it once & coudn't find any thing related to this. Let me go through it once again. In case if you know the exact page number where I can find this info, please forward it.

RE: OUTPUT : HY8 FOR CULVERT DESING

(OP)
Thanks Terry,
It helped!

RE: OUTPUT : HY8 FOR CULVERT DESING

Thanks again Terry,
I needed a quick and concise depiction of this for a submittal.  This will do.

Do you know if this is copyrighted data?  I will just site the web address for now, but would love to give credit to whoever wrote/drew this.

Let me know.

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