There was a change in EPA SWMM 5.1 to better represent Weekend vs Weekday Hourly flow patterns
Fields for the DWF Tables in H2OMap SWMM and InfoSWMM are:
- Scenario Name
- Junction ID for the node that receives the DWF
- The item – either FLOW, MASS or Concentration (Use Blockedit to just set this at Flow for all Rows) and you should fix your problem.
- Value – the flow in the units defined in the Run Manager
- Pattern1 – Can be Weekend, Hourly (Weekday only), Monthly or Daily patterns. They can be in any order but Hourly only applies Monday to Friday.
- Pattern2 – Can be Weekend, Hourly (Weekday only), Monthly or Daily patterns. They can be in any order but Hourly only applies Monday to Friday.
- Pattern3 – Can be Weekend, Hourly (Weekday only), Monthly or Daily patterns. They can be in any order but Hourly only applies Monday to Friday.
- Pattern4 – Can be Weekend, Hourly (Weekday only), Monthly or Daily patterns. They can be in any order but Weekend only applies to Saturday and Sunday.
- Alloc Code which is a tag from the DWF Allocator
It used to be that the two hourly patterns were applies as
… the week end flows are generated in the model by multiplying Node DWF x Hourly x Weekend x Daily x Monthly.
But now
… the week end flows (Saturday and Sunday) are generated in the model by multiplying Node DWF x Weekend x Daily x Monthly.
… the daily flows (Monday to Friday) flows are generated in the model by multiplying Node DWF x Hourly x Daily x Monthly.