waseem19
Civil/Environmental
- Nov 23, 2002
- 82
All,
What are the main benefits of modeling a sewer system with a backwater analysis? I know that this way you can locate hydraulic jump locations and exact water depths in each pipe segment but are there any other advantages? I can see the benefit of locating a hydraulic jump but isn’t an approximate water depth enough ?
if you run your model in term of pipe capacity only, just to make sure that each pipe can handle the peak flow at the constructed slope without exceeding the velocity limits (0.75m/s - 2.5m/s ) and ensuring a maximum depth of 70% "the client is rich and he is happy with this number" would that be enough ? do I still have to do a backwater analysis ?
The discharge points are always either an existing manhole or a pumping station wet well so tail water is not really encountered or very localized.
The reason I’m asking is that I’ve just obtained Sewercad of Haested method and it uses the backwater analysis method. I’ve worked before on excel sheet that only checked the pipe capacity.
Please try to answer my questions one by one.
Thanks all for your inputs.
What are the main benefits of modeling a sewer system with a backwater analysis? I know that this way you can locate hydraulic jump locations and exact water depths in each pipe segment but are there any other advantages? I can see the benefit of locating a hydraulic jump but isn’t an approximate water depth enough ?
if you run your model in term of pipe capacity only, just to make sure that each pipe can handle the peak flow at the constructed slope without exceeding the velocity limits (0.75m/s - 2.5m/s ) and ensuring a maximum depth of 70% "the client is rich and he is happy with this number" would that be enough ? do I still have to do a backwater analysis ?
The discharge points are always either an existing manhole or a pumping station wet well so tail water is not really encountered or very localized.
The reason I’m asking is that I’ve just obtained Sewercad of Haested method and it uses the backwater analysis method. I’ve worked before on excel sheet that only checked the pipe capacity.
Please try to answer my questions one by one.
Thanks all for your inputs.