Stormwater Studio

Storm Sewer Design Software

The Simpler Storm Sewer Design Software

Finally, stand-alone storm sewer design software with an intuitive user interface. Featuring automated design & analysis capabilities; true, energy-based HGL calculations; user definable design constraints and easy work flows.

Easy to Learn

Stormwater Studio was built to be intuitive, clear, and easy to use. Engineers immediately get it and they love using it. And you will too. We promise.

Easy to Use

Import pipe network layouts and background maps from your existing CAD software or draw your storm sewer system on-screen. Add data in a smart grid-style editor. Click the compute button and a split second later you’ll be presented with a robust design and analysis, rich graphical profiles, surface views and professional reports.

Easy to Love

You’ll be hooked with simplified workflows, fast results and stunning graphics that make stormwater modeling far easier than your current software.

How to Design Better Storm Sewers

That’s easy. You just need to have the right software. Providing clear inputs, sophisticated calculations, clean graphical outputs and professional reporting.

Calculations Done Right

Stormwater Studio handles all flow regimes including partial depth (free surface), full, surcharged, supercritical flow with hydraulic jumps. Circular, rectangular, elliptical, arch and open channels are supported. A full host of compute options let you do things your way.

Everything You Need to Design Better Storm Sewers

Specify any starting tailwater elevation as well as existing invert elevations, pipe sizes or slopes. Junction loss and inlet calculations follow the latest HEC-22 procedures or AASHTO. Specify any starting tailwater elevation as well as existing invert elevations, pipe sizes or slopes. It also has many automated design options.

You'll Produce to a High Standard Than Before

With best-in-class graphic output to accompany top-notch analysis, you’ll proudly produce storm sewer models that comply or exceed local regulations and standards.

Deliver Perfect Storm Sewer Designs.

Real-Time Insights to Storm Sewer Modeling

“What-if I changed that 36-inch to a 30? How would that affect the HGL upstream?” Stormwater Studio answers questions like that and many other design “What-ifs”… in real time; during the calculations.

Design Your Storm Sewers in Real Time

An interactive tool-bar provides the means right on the profile drawing. Modify pipe sizes, slopes & inverts with a single mouse click and see instant results. You'll get it done right the first time. A real breakthrough in value-engineering your storm sewer designs.

Model Existing Storm Sewer Systems

Import Pipe Networks from LandXML, STM, polyline-to-pipes from DXF or draw the lines in against a geo-referenced background map. Up to 200 lines with multiple outfalls can be included as well as dynamic TIN surfaces. Computing options add notifications pointing you to any weak spots in the system. Make changes and recommendations for improvements.

Create IDF Curves for Your Project or Region

Develops Intensity-Duration-Frequency (IDF) curves with up to 8 return periods. Download local IDF curves directly from Hydrology Studio RainMaps, import from NOAA Atlas 14 or enter any known data. Set up your rainfall data once and forget about it.

Models a Variety of Inlet and Junction Types

Built-in HEC-22 inlets are customizable and ship with user-definable defaults for things like length, width, throat height, open area, cross-slopes, etc.

FHWA HEC-22 Inlets

Curb (horizontal or inclined throat) - Grate - Combination - Drop Curb - Drop Grate - Headwall with optional Overflow Weir - Generic (known capacity) - Manhole - None. Set inlets in sag or on-grade with compound gutter cross-slopes and local depressions. Bypass flows can be directed offsite or to any other inlet in the project including upstream inlets or other systems. Computes inlet and gutter spreads.

Designs Riprap Aprons

The final detail is outlet protection. Using HEC-14 methods, Stormwater Studio determines the required dimensions of a riprap-based apron for any outfall you choose. Details include length, width, depth, D50 rock size, FHWA Class and exit velocities.

Models Headwalls with Over-topping Weirs

Stormwater Studio can check any headwall with any inlet configuration for HDS-5 inlet or outlet control. Even models over-topping weirs.

You Demand Authority and Attention

Excellent engineering work deserves excellent reviews. And you’ll get it every time with exceptional looking print-outs. Tabulations, graphs and production-ready profiles are designed to be easily understood by you while influencing your reviewers and peers.

Best-in-Class Professional looking Reports

Built-in report types include tabulated Standard, Energy Grade Line, Inlets, AASHTO Junction Loss, Plan, Profile, Surface and Riprap Aprons. Send to your printer or export as CSV files for importing into CAD or other software for further processing.

Build Your Own Custom Reports

In addition to a variety of pre-formatted reports, we’ve reserved two Custom reports. Select from over 100 variables to place in the columns you choose. Print your plans, profiles and custom reports to letter (8.5 x 11) or Tabloid (11 x 17).

storm sewer design and analysis
  • Interactively designs storm sewer systems up to 200 lines
  • Models new and existing systems with user-defined methods
  • User-definable starting tailwater elevation(s) or automatic
  • Can automatically design pipe sizes, slopes and inverts
  • Computes true energy-based Hydraulic Grade Line (HGL)
  • Optionally balances Tc with HGL during calculations
  • Handles partial, full and surcharged flow regimes
  • Computes supercritical flow profiles with hydraulic jumps
  • Uses Rational method and/or flows can be entered directly
  • Computes Tc and rainfall intensities automatically
  • User-defined Minimum Tc and Suppress Tc
  • Specify IDF equation coefficients or enter known intensities
  • Imports from Hydro-35 or NOAA Atlases for IDF data
  • Develops IDF curves with 8 return periods
  • IDF correction factors can be specified for all frequencies
  • Computes composite runoff coefficients
  • Optionally computes Tc by TR55
  • Clogging factors for inlets on grade and in sags
  • Models and/or designs 9 inlet types
  • User defined defaults can be specified for all inlets
  • Compound cross-slopes and individual local gutter depressions
  • Models circular, elliptical, box and arch sections w/ multiple barrels
  • Models open channels, Trapezoidal, Triangular, Rectangular shapes
  • Computes full flow capacities automatically
  • Automatically computes inlet bypass & carryover flows
  • Computes separate gutter and inlet spread widths
  • Bypass flows can be directed to any other inlet
  • Models flow splits and diversion s
  • Inlet calculations comply with HEC-22, 3rd Edition
  • Imports/exports Pipe Networks from LandXML files
  • Imports/exports system layouts from AutoCAD DXF files
  • Imports LandXML, DXF and image files as background maps
  • Imports Surface TIN maps from LandXML (Up to two concurrent)
  • Opens legacy Storm Sewers .stm files
  • Over 20 user-defined design constraints including min/max pipes sizes, slopes, velocities, etc.
  • Uses the latest HEC-22, Third Edition or AASHTO procedures for junction losses
  • Optionally highlights Lines on your Plan that don’t meet Velocity, Slope or Capacity constraints 
  • Over 20 user-defined design constraints including min/max pipes sizes, slopes, velocities, etc.