This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Volume of Storm Water Attenuation Tank

Hi;

I am designing storm water network for one project in KSA, Storm water peak flow generated from the site is high value, so we have one alternative to make stormwater attenuation tank. My questions as follows:-

1) How I determine the required volume of this attenuation tank using civil storm of sewergems? 

2) What is the difference between the pond provided in Bentley products and the attenuation tank ?

Kindly if you can provide example or steps to calculate tank volume it will be great help

Regards

Sayed Elhagar

Parents Reply Children
  • Hello Sushma;

    Thanks a lot for your reply. kindly note that I do not know what is the pre-development conditions of the project  site, what I have is the peak flow of pre-development stage which is 300 l/sec. but for post development, i know the conditions and the peak flow of 1200 l/sec, so how can I determine the volume based on that.

    Thanks

    Sayed Elhagar 

  • Hello Sayed,

     If you don’t know the pre-development conditions then you can directly go for post-development scenario and use Pondmaker, then in the target flow/volume source you can mention as user defined and then enter the target peak outflow and volume.

    Otherwise model the post-development conditions in the model, if you know the bottom elevation to be reached for pond and top elevation, then enter elevation vs. area data for pond which will give you volume of pond. You can right click on pond > graph > select volume field.

    If you don’t want to do it manually then use Pondmaker as mentioned above. In the step 3 you will get the volume of the pond calculated and the freeboard and max surface water, based on which you can change pond dimensions if required.

    Regards,

    Sushma Choure

    Bentley Technical Suppport

    Answer Verified By: Sayed Elhagr 

  • Hi Sushma, 

    Thanks a lot, really it great help 

    Regards 

    Sayed Elhagar