Time of Concentration (TR-55) Calculator

Although the software has a TR-55 calculator for time of concentration, it doesn't work properly and also needs additional options added. Currently it isn't functional, because the software doesn't allow you to use only 1 or 2 of the 3 flow conditions. Many times a catchment will only have sheet flow and shallow flow and not have channel flow, or only have sheet flow and not have shallow or channel flow. Also, sheet flow may occur over multiple surface types. It's common to have sheet flow begin on a vegetated surface and then transition to concrete or other surfaces before it changes to shallow flow. There should be 3 or more subareas for each flow condition to define these various situations. I hate to mention this if there are hard feelings here, but it should function much like the time of concentration calculator does for SSA. Also, the way SSA reports this information showing the ToC calculations in the report similar to how a typical ToC worksheet is filled out is great for a reviewer. I see the SCS CN calculator is already being worked on, so that's great to hear, because that goes hand in hand with what is needed here with ToC. Hopefully that is being set up similar to SSA, because although SSA has it's issues, having used various different storm software's, SSA actually does a really great job in many areas. I have a love hate relationship with SSA and fell in love with InfoDrainage immediately when I discovered it. I think this has the potential to be the go to storm modelling software for engineers all over the world, and I'm excited to be done with SSA and hold a subscription for this software permanently. However, right now I'm unable to complete my projects here in the Midwest with the above mentioned issues. This should be a relatively easy fix and will really be nice to see in the software. Great job so far, the software is already amazing and I can't wait to see improvements here and there take it to the next level!