This course will guide you through using HY-8 to analyze culverts. You'll watch short demonstration videos and then apply what you've learned to class exercises, and then check you work. Focus is on applying the software to real problems - does not delve deeply into hydraulics, hydrology, erosion control, fish passage, or construction.
Covers the background information and basic vocabulary used in culvert design, technical resources, and where to download HY-8.
A quick introduction to why fish passage in streams is important. Many conservation projects won't require fish passage, but for the few that do this is essential! Here's the link to the NYSDEC stream crossings page mentioned in the video: http://www.dec.ny.gov/permits/49060.html
Describes the basic user interface dialog boxes inside HY-8, without entering any site specific data.
This is a hide-and-seek quiz where I tell you what to find and you go look for it. Don't worry, there's plenty of hints if you get stuck!
Takes a simple existing culvert plan and analyzes it with HY-8. Open the handout and print out both pages - you'll want to reference them while watching the video.
Here is the first sample exercise for you to try in HY-8. Try to figure out whether the existing scenario can pass the 2 year design storm without roadway overtopping. Feel free to play with settings and try out different things as you go.
When you want to check your work, download "Lecture 8 Results.xml" below. You'll need to change the file extension from .xml to .hy8 in order to load it into HY-8. If you need help doing this, you can check out this article: http://www.mediacollege.com/microsoft/windows/extension-change.html
Here is a larger problem for you to work through. There are two barrels that empty into a pool downstream. Also, the peak flows are in a different format - see how HY-8 behaves using Min/Design/Max versus doing recurrence intervals. Figure out whether the culverts can pass the design flow without overtopping the road. Feel free to play with settings and try out different things as you go.
When you want to check your work, download "Lecture 9 Results.xml" below. You'll need to change the file extension from .xml to .hy8 in order to load it into HY-8. If you need help doing this, you can check out this article:http://www.mediacollege.com/microsoft/windows/extension-change.html
Just a few comments on some of the quirks in HY-8 you might have picked up on, and a humble request for comments and revisions.
Print this handout and follow the instructions on it. You'll be designing a culvert under an access road mostly from scratch using HY-8. The completed solution is in the Lecture11answers.xml file below. Remember you'll need to change the file extension back to .hy8 to read the file.
Here's the exact same scenario, but with larger flows. Try to visualize the pipes under the access road and how much cover they will need - this is an exercise in making sure there's enough cover. Results are below, remember to change the file extension to .hy8 in order to view it.
This lesson wraps up the culvert design series and briefly touches on a couple notable topics such as outlet protection and pipe cover.
Tim is a NY State Registered Professional Engineer with a diverse background in agricultural conservation, civil/site design, railway design, aviation design, and highway design. He is currently the State Engineer for the New York State Soil and Water Conservation Committee housed at the NY State Department of Agriculture and Markets, where he is dedicated to improving the planning, design, and construction of conservation practices across New York State.