HY-8 Velocity Limitation
HY-8 Velocity Limitation
(OP)
I am using HY-8 for the analysis of existing cross-pipes, trying to determine headwater elevations. The drainage manual i am using lists conflicting limitations for the HY-8 software. In one instance, it is noted that HY-8 should not be used where entrance velocity exceeds 5 ft/s. In another instance, it is noted that HY-8 should not be used where stream velocity exceeds 5 ft/s. I cannot find any reasoning behind these limitations to determine whether to use stream velocity or culvert entrance velocity as the determining factor.
Can anyone provide clarification on which velocity should be used as the determining factor?
Can anyone provide clarification on which velocity should be used as the determining factor?





RE: HY-8 Velocity Limitation
RE: HY-8 Velocity Limitation
Neither is expressly listed as a limitation of HY-8. But I am wondering if it has something to do with the fact that HY-8 ignores the approach velocity head.
RE: HY-8 Velocity Limitation
RE: HY-8 Velocity Limitation
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