HydroCAD® Stormwater Modeling - Since 1986
HydroCAD Supports Rainstore3™
HydroCAD provides direct support for the Rainstore3, manufactured by Invisible Structures of Golden, Colorado. This allows the Rainstore3 to be easily used within any HydroCAD model for stormwater storage, detention, or infiltration.
The Rainstore3 can be modeled with HydroCAD-9.1 build 22 or later. If you have an earlier version of HydroCAD, you must obtain a program update in order to model Rainstore3 products. System heights of 16 and 20 units were added in HydroCAD-10 build 15.
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.
HydroCAD can also model almost any imaginable storage arrangement, including chambers of different sizes combined with auxiliary storage from adjacent pipes and catch basins, and even the above-ground areas (parking lot) that may provide overflow storage for certain events.
Modeling the Rainstore3
Setting up a pond to use Rainstore3 chambers is a simple process: Just select the "ISI Rainstore3" from the chamber library and set the desired height. The chamber library includes the recommended product heights from 0.1 to 2.4 meters high.
For earlier versions of HydroCAD, select "Rainstore3" along with the desired height.
If you wish to allow for storage in porous backfill, you can describe the shape and dimensions of the outer excavation, plus the voids (porosity), and the composite storage is calculated automatically. Or you can use the new chamber wizard for automatic chamber layout, modeling, and cost estimating.
Detailed chamber information
For detailed chamber specifications and design information, please visit the Rainstore3 Support Page
For more information about HydroCAD
Please see the following pages for further HydroCAD information:
Pond storage calculations
Images courtesy of Invisible Structures, Inc.
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