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  1. mendacem

    Sanitary Sewer modeling software

    Thanks for your input. I am familiar with ICM yes, but the license price outweighs benefits for me at this moment, as I am freelancing, so I was kind of looking for some free options, or at least options with monthly subscriptions at reasonable prices. I was looking at software such as CLOACAS...
  2. mendacem

    Sanitary Sewer modeling software

    Hello everyone! I'm about to start learning sewer modeling. I've done a few models by hand but would like to modernize my workflow. What is the most popular sanitary sewer modeling software? Preferably free, but I do have an SSA AutoCAD license, so I'm wondering how it compares to other options...
  3. mendacem

    Discrepancies in results compared to other software and hand calculations

    Hey again, thanks for taking the time to help me out. I'm attaching the CN calculations and data broken down by area. As you can see, the values aren't uniform across the basin. I did detailed calculations and area percentages, but since, as I mentioned, it's primarily an urbanized area, I'm...
  4. mendacem

    Discrepancies in results compared to other software and hand calculations

    So, I should rely on the software data? That actually works better for me, but I just wanted to double-check to make sure I'm not overestimating my calculations. Is the time of concentration accurate? I checked it using two different formulas and got around 48 minutes with both, the average...
  5. mendacem

    Discrepancies in results compared to other software and hand calculations

    So the equations I used are S= 1000/CN-10 , Q= (P-0.2)^2/(P+0.8S) as an runoff depth, time to peak Tp=0.6*Tc, Qpeak= 484*A*Q/Tp I have a concern because I have insight in a bridge project about a mile away from mine, which has similar curve numbers (CN) and the same rainfall depth. However, its...
  6. mendacem

    Discrepancies in results compared to other software and hand calculations

    Hey, thanks for talking the time to answer and running the model. Yes, when I run it in HydroCad I get similar results like yours but as I said I need to use SCS type III 24 hour storm and the rainfall depth is actually 8.9 inches. The CN number checks out, it is high because it is mostly...
  7. mendacem

    Discrepancies in results compared to other software and hand calculations

    Hello everyone, This might seem like a basic question, but I'm having trouble figuring out what's wrong with my setup. I need to create a simple runoff model, so I set up one subbasin and input rainfall data into HydroCAD. The basin area is approximately 0.35 square miles, with a Curve Number...

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