Hec Ras Box Culvert Bug?
Hec Ras Box Culvert Bug?
(OP)
In an unsteady model, I've modeled a 5.3'x5.3' (~28 sq ft flow area) concrete box culvert that conveys a maximum of 25 cfs of roughly 380 cfs at the peak of the 100-yr hydrograph. The remainder of the flow overtops a lateral structure upstream of the culvert, flows into a storage area that is also connected to the same reach at a point about 1000' downstream, thereby short circuiting a portion of the channel.
An identical channel with a 6' diameter (~29 sq ft flow area) circular corrugated metal culvert in place of the box culvert conveys a maximum of about 245 cfs of the same hydrograph.
Have any bugs been identified with box culverts in UNET?
-Brian
An identical channel with a 6' diameter (~29 sq ft flow area) circular corrugated metal culvert in place of the box culvert conveys a maximum of about 245 cfs of the same hydrograph.
Have any bugs been identified with box culverts in UNET?
-Brian





RE: Hec Ras Box Culvert Bug?
RE: Hec Ras Box Culvert Bug?
My units are feet. Hec Ras won't allow for inches in this dialog.
Thanks for the response, Brian
RE: Hec Ras Box Culvert Bug?
Try editing the cmp run to change it to a box and see if you get similar results.
RE: Hec Ras Box Culvert Bug?
Unfortunately, now I am losing flow after the hydrograph returns to baseflow. Instead of passing 2.5 cfs as I have defined it, only 0.1 cfs makes it through. Any ideas?