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Soil/Land use Curve Number-Antecedent Mosisture condition

Hi

I am sending a pdf file which has a Soil/Land use Curve Number that are a little bit different with the library into the software.

1-Please let me know how can I add a new library based on those

2-In the attached file there is a graph for Antecedent Mosisture condition.

3-where can I find the time to peak calculated in the software?

I will send a design example based on that, could you please show me how can I model that example into the SewerGems?

 

Thanks

Hamid

  • Please let me know have you get the attached files or not?
  • Hello Hamid,

    Please let us know the names of the files associate with this.

    Thank you.

    Regards,
    Scott
  • Hi
    MTO Drainage Management Manual.pdf & design example.pdf
    this one is urgent
    thanks a lot
  • Hello Hamid,

    For the engineering libraries, the steps to update or add to the library can be found here:

    http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/modifying-and-adding-entries-to-engineering-libraries

    For the antecedent moisture item, I'm not sure what you are asking (if anything). There is limited information in the Help documentation on that, though it seems to be related to the Horton method. You can find more information in the Help topic "Unit Hydrograph Runoff Method."

    for the time to peak, you can often find this in the element properties. The exact name of the field will be related to the field you are interested in. However, you can use the Property Search feature found in the properties grid in SewerGEMS V8i SELECTseries 3 and later to help with this. You can search for keywords such as "Time" and have the properties grid filter on that phrase. The following link has information on using the search function:

    http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/19205.how-to-search-for-key-words-or-phrases-in-the-properties-grid

    For the design example, what part of that are you having an issue with? I will be happy to help with specific issues, but at this point there doesn't appear to be a model started, so I cannot be certain where the issue is.

    Regards,
    Scott
  • if you take a look to the design example it calculate CN composite and then by using of Design chart 1.10 indicate AMC III .
    let say CN composite is 65 , from design chart 1.10 it says I should intersect with AMC III and get the 81 as new composite CN.
    Actually this is standard of ministry of transportation in Canada.
    Thanks

    Hamid