HELP IN THE CONFIGURATION OF RAINWATER SEWAGE

Question

Good afternoon
I recently made the delivery of a storm sewer model and observations arrived, and I would like to confirm the solution of these:
1. The Darcy-Weisbach equation is suggested for the calculation of friction losses in collectors.
2. Do the hydraulic analysis in both uniform flow and non-permanent flow.
3. It is suggested to contemplate the losses generated in the connection structures to wells. 
 Note: I look forward to your response, thank you in advance for so much collaboration

Scott Kampa · Answer

Hello Jefry, 
 The GVF-Rational solver uses the gradually varied flow method to solve for the results in a system. You can find information on this in the Help documentation. There are some normal flow and normal depth results that are available, but these is mainly used to find capacity. You can find these results by looking for fields like Depth (Normal). Since these normal results are provided, you can use them in reports. But the profile results that you see will be based on gradually varied flow. See these links for details: 
 Why does the profile for the system appear to be at odds with the results for the capacity? 
 How are the profile descriptions derived in SewerCAD's GVF-Convex solver or StormCAD's GVF-Rational solver? 
 For the different headloss methods, information the HEC-22 methods mentioned in the link Yashodhan provided can be found the the HEC-22 manuals. The Absolute headloss method simply applies the value you enter. If you enter a 0.5 meter headloss, that will be the headloss on the structure. The Standard headloss method applies a coefficient to calculate the head loss based on the velocity head of the exit conduit. More information on this can be found in the Help documentation. 
 Regards, 
 Scott