HydroCAD Stormwater Modeling - Since 1986

HydroCAD Supports Baughman Tile
Poly Smooth-Line Pipe

HydroCAD provides full support for Baughman Tile Smooth-Line double-wall HDPE pipe.  This partnership allows Smooth-Line to be easily used within any HydroCAD model for stormwater conveyance, storage, detention, or infiltration.  HydroCAD includes complete Smooth-Line storage definitions, plus an interactive chamber wizard for easy layout, pricing, and modeling of underground storage systems.

Support for Baughman Smooth-Line pipe is available in HydroCAD-10 build 20.  Users earlier versions should obtain a program update in order to get the latest chamber definitions.  If you're already using HydroCAD-10, make sure you have "build 20" or later in order to get Baughman support.  Details here.

How storage is modeled

Stormwater storage typically appears in a HydroCAD model as part of the storage definition for a "pond".  In the simplest case, HydroCAD calculates the total available storage, including the interior of the chambers (pipes), plus the void space in any surrounding stone.  For a more complete analysis, a full stage-storage curve is calculated so that an inflow or runoff hydrograph can be routed 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 HydroCAD 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, catch basins, or other contributing volumes.

Click for complete self-training materialsBut the most significant feature is the ability to embed (bury) chambers in a bed of 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 layered 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.

Using Baughman Smooth-Line pipe

Setting up a pond to use Baughman pipe storage is a simple process:  Just pick the desired pipe size from the drop-down list, and specify the number of "chambers" (pipe lengths) plus their elevation.  The HydroCAD chamber wizard automatically calculates the overall size of the system based on the manufacturer's recommendations, or you can customize the layout to suit your specific requirements.

Technical notes

Size (in)
ID (in)
OD (in)
12 12.05 14.55 0.7920 1.0277
15 14.90 18.22 1.2109 1.6007
18 17.80 21.15 1.7281 2.1907
24 23.95 28.20 3.1285 3.9143
30 30.00 35.73 4.9087 6.2440
36 35.90 41.43 7.0294 8.5454
42 41.90 48.58 9.5754 11.7181
48 47.50 53.60 12.3059 14.8759
60 59.50 66.50 19.3091 22.4359

The HydroCAD storage values for Baughman Smooth-Line pipe are based on the actual inside and outside diameter.  When calculating the pipe displacement, 35% of the total wall volume is considered to lie outside the pipe, so the displacement is reduced by this amount.

For further technical information, read about modeling corrugated plastic pipe.



Detailed product information

For detailed Smooth-Line specifications and design information, please visit the Baughman Tile product page.

For more information about HydroCAD

Please see the following pages for further HydroCAD information:

    HydroCAD home page
    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

Poly Smooth-Line is a registered trademark of Baughman Tile Co.
HydroCAD is a registered trademark of HydroCAD Software Solutions LLC
Product illustrations Baughman Tile Co..


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