HydroCAD Stormwater Modeling - Since 1986

LRM stormwater products supported by HydroCAD

This product is no longer available from the manufacturer and should not be used for new designs.  For compatibility with previous HydroCAD project files, the chamber definitions are still present in the HydroCAD chamber library but are "hidden" to prevent inadvertent use in new projects.

HydroCAD provides direct support for the HydroDome chamber system produced by LRM Industries of Rockledge, Florida.  This allows the HydroDome 300 and 610  to be easily used within any HydroCAD model for stormwater storage, detention, or infiltration.

The HydroDome can be modeled with HydroCAD-10, which also provides an interactive chamber wizard for easy layout, pricing, and modeling of underground storage systems.  Earlier versions will require a program update in order to model the HydroDome.

Note:  You will find the HydroDome listed alphabetically by manufacturer as "LRM HydroDome"

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 with the HydroDome

Setting up a pond with HydroDome storage is a simple process:  Just pick the desired HydroDome product from the drop-down list, and specify the number of chambers plus their elevation.

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 LRM Industries.

For more information about HydroCAD

Please see the following pages for further HydroCAD information:

    Pond storage calculations
    Storage chamber modeling
    Exfiltration calculations
    General support page
    HydroCAD features and capabilities
    Free evaluation program
    Pricing and ordering

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