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Junction loss Across catch basin with sumped bottom

Junction loss Across catch basin with sumped bottom

I'm looking for any info on calculating the junction loss across a inlet box with a sumped bottom. We received a comment for the Township requesting specific loss value. I currently have the pipes modeled in Hydraflow/Civil3D and have no way accounting for the basin invert depression.

Any info would be appreciated.


RE: Junction loss Across catch basin with sumped bottom

Refer to HEC-22 section 7.1.6 for information on energy losses.

It seems that hydraflow calculates junction losses based on the "Approximate Method" (Sec and does not account for benching.

RE: Junction loss Across catch basin with sumped bottom

I think you're correct. I think I found a work around, so hopefully the county buys in on it.

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