HydroCAD Supports
StormPod® Stormwater Chambers
HydroCAD provides direct support for the StormPod system of precast concrete stormwater chambers manufactured by Rotondo Environmental Solutions. This allows StormPod chambers to be easily used within any HydroCAD model for stormwater storage, detention, or infiltration.
Although some Mid-Pro sizes were supported in HydroCAD-10 build 21, HydroCAD 10.2-8a is required to model the full line of StormPod chambers, including the Lo-Pro, Mid-Pro, Hi-Pro, and Stack-It. If you have an earlier version of HydroCAD, you must obtain a program update in order to model these products.
How chambers are modeled
In a HydroCAD model, stormwater chambers typically appear as part of the storage definition for a "pond". In the simplest case, HydroCAD calculates the available storage for use with other calculations. But more often, it is used to generate a complete inflow or runoff hydrograph and route it through the pond. The resulting analysis indicates the water levels attained throughout the rainfall event, as well as any discharge that may occur through outlet devices or infiltration into the surrounding ground.
Flexible storage options
Each pond may include an unlimited number of storage definitions as required to describe its overall storage characteristics. This makes it easy to model complex storage arrangements, such as a combination of multiple chambers, pipe storage, catch basins, or other contributing volumes, including above-ground areas (parking lots) that may provide overflow storage for large events. HydroCAD can also calculate the storage contribution from sand or gravel that surrounds the chambers. Or the storage can be limited to the chamber itself.
Modeling StormPod chambers
Setting up a pond to use StormPod chambers is a simple process: Just pick the desired StormPod model and height from the drop-down list, and specify the number of chambers and rows. Or you can use the HydroCAD chamber wizard to automatically layout the system and calculate the storage. The wizard will automatically include storage in the surrounding stone backfill, unless you set the stone voids to zero.
Note: With the latest v2 chamber definitions, the system will be composed entirely of the "360" chambers, and will no longer include a storage estimate for any "180" units around the perimeter.
Detailed chamber information
For detailed chamber specifications and design information, please visit the StormPod web site.
For more information about HydroCAD
Please see the following pages for further HydroCAD information:
Pond storage calculations
Storage chamber modeling
(includes step-by-step instructions)
Exfiltration calculations
General support page
HydroCAD features and capabilities
Free evaluation program
Pricing and ordering
Images courtesy of Rotondo Environmental
Solutions LLC.
StormPod® is a registered trademark of Rotondo
Environmental Solutions LLC.
HydroCAD® is a registered trademark of HydroCAD
Software Solutions LLC.