Brentwood StormTank

HydroCAD^® Stormwater Modeling - Since 1986

HydroCAD Supports Brentwood StormTank™

HydroCAD provides direct support for the StormTank™, manufactured by Brentwood Industries of Reading, Pennsylvania. This allows the StormTank to be easily used within any HydroCAD model for stormwater storage, detention, or infiltration.

Brentwood products can be modeled with HydroCAD-9.0 or later, which also provides an interactive chamber wizard for easy layout, pricing, and modeling of underground storage systems.

Users of HydroCAD 8.5 can download a chamber update for use with their current software. However, a program update is recommended to take advantage of the new chamber wizard.

If your setup program was released prior to 2/22/10, please install the latest chamber update to make sure you have up-to-date Rainstore³ chamber definitions.

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.

But the most significant feature is the ability to embed (bury) chambers in a bed of crushed stone, and have HydroCAD automatically calculate the combined storage at any water surface elevation. This makes it easy to determine the storage for virtually any configuration of storage chambers, without resorting to any manual calculations.

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 Brentwood StormTank

Setting up a pond to use StormTank chambers is a simple process: Just pick the desired StormTank height from the drop-down list, and specify the total number of chambers.

Note: The chamber library includes the standard heights from 18" to 36" in 6" increments. Each height is provided in "narrow" and "wide" end-views, to match the desired row layout.

For chambers in a stone bed, you can describe the shape and dimensions of the outer excavation, plus the stone 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 Brentwood Support Page

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 Brentwood Industries.
StormTank™ is a trademark of Brentwood Industries.
HydroCAD^® is a registered trademark of HydroCAD Software Solutions LLC.