Ah yes I see - I added the extra connection as you described above, just to check, and needed to set the time step to 0.0001 to smooth the hydrograph. I greatly appreciate the quick response.
Thank you for the quick reply and making me aware of the Offline Chamber resources - I hadn't seen that previously. That's essentially how I've been doing it for past projects, but was hoping for a way to determine the effects of the equalizing pipe diameter on inter-flow. If that isn't easily...
Hello Psmart,
I've been working on a couple residential stormwater detention designs, and some of them feature reverse flow conditions.
Traditionally we would have the site drainage in a 6-inch pipe and this would enter into the uphill side of our Detention Storage Pipe.
The Detention...
We have an upper pond and a lower pond at elevation connected by a 450' length of creek. Flows from an approximately 30 acre water shed will flow through this creek.
The landscape architect would like to have two small basins between the upper and lower ponds, and several 2-4' waterfall drops...
Hey everyone,
I'm designing a ~27,000 sq-ft. wet pond which holds approx. 650,000 gal. and serves a drainage area of approximately 30 acres.
The desired pond water elevation & corresponding weir crest elevation are 465'
I'm trying to determine ideal dimensions for my sharp-crested contracted...
It took me a couple hours this morning but I've got my model working correctly. My main issue was that I hadn't factored in a tailwater dependency. But a bigger issue was that reverse-flow was occurring in our downstream node! I've attached a picture of our routing design.
During a large...
Hi again psmart thanks for your analysis - I appreciate the feedback and will be more diligent in analyzing my error messages. I suspected the condition might be tailwater-sensitive, and attempted to use DSI routing, however that created significant oscillations in my detention hydrograph, which...
Hi again,
I believe I'm modeling my design properly, but I'm having trouble interpreting one of the results. I've attached the file for reference.
Essentially I have a simple system with a Catchment area feeding into a Catch Basin which flows into a detention pond (36" pipe 25 ft. long). This...
Awesome! I got it to work today. Your answer helped me out. Essentially my pump is only able to output 0.08 cfs, meanwhile the peak incoming is upwards of 0.5 cfs. At a certain point the detention fills, and since I had no designated overflow, there was nowhere for the water to go, hence the...
psmart thank you for the quick response. I understand what you mean regarding the overflow outlet, but how do I properly implement one? Is it considered a Secondary pump outlet, or a separate entity altogether?
Also thank you for the suggestion about the storage volume in the catch basin, I...
Hi guys, new to HydroCAD, but trying to model a relatively simple system and it's giving me a huge headache.
We have a Collection Area -> Reach -> Detention System (Storage Pipe w/ Culvert outlet) -> Detention System (Catch Basin w/ Pump)
Everything was working fine, until I tried increasing...
