Culvert Flow Classification Parameters

[owillis28]

When determining the culvert flow type, one of the criteria is h4/D < 1.0

In doing problem 19-22 out of the Practice Problems book that accompanies the CERM , the culvert is classified as a type 4 flow. In the solution, its noted that h4 = D = 3.5 ft. Isn't h4/D equal to 3.5/4, or 0.875?

Am I totally missing something or just have a brain freeze from studying all day?

owillis

 

[Guest]

owillis28 --

It has been awhile since I have done culvert problems, but the criteria you mention is actually a CONSTRAINT, meaning in the case of Type 4 (submerged outlet) culvert that h4/D MUST be greater than 1.0. I don't think you can solve for a parameter based on the inequality.

JR

 

[owillis28]

OK. I finally figured out what I was doing wrong. Guess I need to take a break for awhile.

owillis

 

[owillis28]

Now that I look at my original question, I am in disbelief how confused I really was. Let me apologize for my stupidity.

owillis