HY-8 multiple culverts
HY-8 multiple culverts
(OP)
I was wondering if anyone might have an explanation for varying HY-8 results depending on how one models multiple culverts (I am using the latest release v7.1).
I am simply modeling 2 identical parrallel culverts. One option is to set the "Number of Barrels" in the culvert properties to 2.
At one point I wished to check some alternatives with varying the inverts of the second culvert. So I took the second approach of having 2 culvert definitions for the one crossing. Using this approach, setting all properties identical for both culverts yeilds a different headwater for the same flows than using a single culvert definition with 2 barrels.
I have attached the file in question for those interested.
Any ideas?
I am simply modeling 2 identical parrallel culverts. One option is to set the "Number of Barrels" in the culvert properties to 2.
At one point I wished to check some alternatives with varying the inverts of the second culvert. So I took the second approach of having 2 culvert definitions for the one crossing. Using this approach, setting all properties identical for both culverts yeilds a different headwater for the same flows than using a single culvert definition with 2 barrels.
I have attached the file in question for those interested.
Any ideas?





RE: HY-8 multiple culverts
RE: HY-8 multiple culverts
I was abount to post this, then tried one more thing. When I opened the file from HY-8, the headwaters agree. When I launch HY-8 by double clicking the data file in Windows Explorer, I get 21.60 for the doubld barrel, but get 21.10 with the two culvert definitions. It seems something does not get initialized when launching from Explorer.
RE: HY-8 multiple culverts