×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Best way to model inlets of curb-cut raingarden retrofit streets?

Best way to model inlets of curb-cut raingarden retrofit streets?

Best way to model inlets of curb-cut raingarden retrofit streets?

(OP)
What is the best way to model a street proposing to retrofit several curb-cut raingardens?  In particular, how do you handle the curb cuts (flow enters RG until RG fills to inlet elevation then bypasses inlet thereafter) and then connect the whole catchment(s) for a bottom of hill/end of street hydrograph?

RE: Best way to model inlets of curb-cut raingarden retrofit streets?

There are different ways and no obvious "best way".  It sounds like you need a hydrograph for the road subbasin that has the rain gardens, and that the curb cut itself does not need to be modeled explicitly....

In municipalities that use TR-55/curve number methods, the storage of "IMPs" can be translated into a mean storage depth over the whole basin and then the curve number ratched down accordingly (reference:  LID Hydrologic Analysis, Prince Georges County Maryland, July 1999)

In municipalities that use Rational methods, the presence of the rain garden will extend the time-of-concentration for the basin, which in turn will reduce the rainfall intensity used in analyses.  This could be determined in an interative fashion, you might find some insight in the City of Chicago storm design spreadsheets.

In municipalities that use continous models, e.g. Washington State, you would have to use the prescribed models and methods of the local agencies, or if guidance is lacking.  This is likely to be some sort of detailed level pool routing for a shallow infiltration BMP.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources