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Thank you, Peter. Now if I know the storm duration is 11 hours, and the total depth for these 11 hours is 1.29 inches. Do you think it is accurate to do it in the following way (as shown in the snapshot)? Or I have to use the "Sample F" rainfall file to define a rainfall distribution with...

Hi Peter, Thank you for your reply and guidance. I just want to clarify the following sentence: "The duration will be set automatically based on your data." Does this mean I should leave the duration field blank, and HydroCAD will automatically set it to 11 hours based on the 11 "timeincr"...

Thank you, Peter. Sample F is a 24-hour rainfall, but I want to simulate 11-hour rainfall, may I ask how does it work? Can I just change 24 to 11, like follows? name=Sample F 11-hr comment=Incremental rainfall w/arbitrary time step smoothing=false timeunits=hours depthunits=inches // The...

Hi Zelgar, Thank you for your reply. We have 11 hours of precipitation data from 12:54 AM to 11:54 PM on 9/23/2023, obtained from the National Weather Service. Our team also measured the flow at one culvert outfall onsite on the same day. We aim to use this 11-hour precipitation data to...

Hi guys, I have precipitation depth for 11 hours and I want to use this storm data to create a rainfall event to do the analysis, does anyone know how to do that? I attached my HydroCAD model and the last thing to do is to create the rainfall event. Besides, what is the P2(2yr-24hr Rain) I...

Hello, I create a pond in HydroCAD, its principle spillway is weir. I have a discharge-elevation curve for this weir as shown below. Now I want to manually type it into the HydroCAD, so the water will flow out according to the discharge-elevation curve. does anyone know how to do it?

Hello, Please see my HydroCAD model in the attachment. When I run it, the inflow and the outflow of one reach named "Reach 17A" is highly different. It seems like the reach decreases the inflow a lot after flow pass it. Do you know what happened with my model? Best, Thank...

Sorry, just type last sentence wrong. Do you know how to solve the following 3 problems? please see the HydroCAD model in the attachment with updated node number. [90] Warning: Pond 1P Qout>Qin may require smaller dt or Finer Routing [80] Warning: Pond 2P Exceeded Pond 3P by 0.03'@12.45...

Hello Peter, Thank you for the suggestion, I already change the node number to be simple. I attached the updated HydroCAD. So in my case, how to deal with the warning 90? I changed the finer routing to 1, then warning 80 shows up. And I also use a shorter time span (0-30 hours), then warning...

Hello Peter, The attachment is my HydroCAD file, I used "Dyn-Stor-Ind" method, dt is 0.01 and Finer Routing = 3. When you run it, there is warning for Pond Ex 72" RCP-35'. Could you help me debug this? Thank...

Thank you so much, Peter.

Hello Peter, Thank you so much. I use zero-storage and it works now. But in our case, actually it is a pond with storage instead of a zero-storage culvert. Just for the curiosity, do you know why the peak outflow is larger than the peak inflow of one culvert just because we add some storage...

Hello, Yes, I did click the warning, and the following screen shot shows up. I used smaller dt and increased the Finer Routing (my current dt is 0.01 and my Finer Routing = 3), the warning still existed, my peak outflow is larger than peak inflow, do you know why? Do you have some method to...

Hello, please see the screen shot below for my model. A 36" RCP insert into a 72" RCP, so I break up the 72" RCP into two pipes: a shorter 72" RCP and a 36" RCP insert into a longer 72"RCP. I use "Dyn-Stor-Ind" method to run the model, and the following warning shows up, I clicked it and it...

Hello, I just create the model as the following screen shot and run it, but I get the warnnings: warning: Pond Ex 72" RCP-length 80' Submerged Pond Ex 36" RCP-length 150' Primary device # 1 INLET by 1.47' warning: Pond Ex 72" RCP-length 80' Exceeded Pond Ex 72" RCP-length 20' by 0.46' @ 12.34...

Hello, Thank you for your suggestion, I just create the model like what you said, but I receive the warning: Pond Ex 54" ACCMSPP Submerged Pond Ex 36" CMP Primary device #1 INLET by 3.66', so how to deal with this case? thank you

Thank you for that. So for the Ke of 72" RCP (length-80'), what Ke should I use for entrance? For 72" RCP (length-20') to 72" RCP (length-80'), Ke should be 0 theoretically, and for 36" RCP (length-20') to 72" RCP (length-80'), what entrance case it fit for this? "groove end w/headwall"...

Hello, so just like this?

Hello, Please see the following 1st screen shot, I mark the dimension for the culverts, so you mean even if the length of 72" RCP is 100', I separate it into two culverts, one is 80' long and another is 20' long, then I create a catch-basin with a 72" culvert outlet (length-80'), a catch-basin...

Hello, Thank you for your reply, I still do not know how to do that, do you mean I use a catch-basin with a 54" culvert and a 36" culvert, setup 54" culvert's "Routing" to be primary and setup 36" culvert's "Routing" to be device 1, like the following 1st screen shot? Or I use two catch-basin...