StormNET® is the leading software for analyzing and designing urban drainage systems, stormwater sewers, and sanitary sewers. It includes a range of features and capabilities that make it faster, simpler to use, and more accurate. StormNET is used by over 3,000 companies worldwide such as URS, Jacobs, Tetra Tech, HNTB, ARCADIS, and Stantec.
» What's New
» Capabilities
» Testimonials
» Case Studies
» Reviews
» Literature
» Download
» Pricing
» Forum
» Training
» Support
» Consulting
- Welcome Dialog
- Online Tutorial Videos
- Brand New! User Manual and Online Help System
- Hydrology Modeling Capability
- Latest NRCS (SCS) TR-20 Analysis Model
- Latest NRCS (SCS) TR-55 Analysis Model
- Complete XPSWMM Support
- Brand New! XPSWMM Import Log File
- Improved Rational Method IDF Data Capabilities
- Composite Curve Number and Runoff Coefficient Capabilities
- Advanced SCS TR-55 Time of Concentration Calculator
- Interconnected Inlets
- Brand New! Additional Storm Drain Inlets Supported
- Model Complex Control Structures
- Merge Option
- Easy to Define Inflows
- Brand New! Globally Assign Raingages
- RDII Unit Hydrographs
- Sophisticated Rainfall Designer
- Improved Water Quality Definitions
- Computation of Required Detention Pond Volume
- Detention Ponds Defined by Surface Area or Volume
- Support for Underground Storage Structures
- Infiltration Basins
- Highway Drainage Calculator
- Reload Previous Analysis Results
- Brand New! Transform Network
- Match Elevations
- Brand New! Display of Flooded/Surcharged Nodes and Surcharged Pipes
- Brand New! Analysis Results Bookmark Navigation
- Summary Results
- Advanced Graphical Output
- Advanced Profile Plot Capabilities
- Brand New! Improved Import and Export Menu
- Export Plan and Profile Drawings to AutoCAD
- Microsoft Excel Reporting
- AutoCAD Integration
- CAD Layers Visibility
- Construction Plan and Profile Sheets
- Sophisticated GIS Capabilities
- Assign Pipe Inverts
- Brand New! Coordinate Editing
- Improved Element Data Definition
- AutoCAD 2008 Support
- Windows Compliant
Startup Welcome dialog provides quick launch shortcuts to help you be more productive with StormNET.
Welcome dialog provides quick launch shortcuts to help you be more productive |
 |
Learn how to get started with StormNET today by viewing our software training videos. Our engineering staff will train you how to proficiently use StormNET for a variety of stormwater and wastewater modeling tasks. This web based training is entirely free, and can be viewed at your convenience!
 |
These tutorial videos
provide a comprehensive overview of StormNET’s capabilities for analyzing and designing urban drainage systems, stormwater sewers, and sanitary sewers |
A completely new user manual and online help system has been developed. All of the advanced capabilities contained within the latest StormNET software have been documented. In addition, the new online help system is very advanced, allowing you to quickly lookup information from anywhere within the software.
 |
StormNET includes the following hydrology models to determine drainage area runoff:
- USEPA SWMM 5.0 (imports XPSWMM™ v10.52 and EPA SWMM v4.4 and earlier)
- NRCS (SCS) TR-55
- NRCS (SCS) TR-20
- US Army Corps HEC-1
- Rational Method
- Modified Rational Method
- DeKalb Rational Method
- Santa Barbara Unit Hydrograph
- Maricopa & Pima Counties (Arizona) Papadakis-Kazan methodology
- Harris County (Texas) Method
We are currently developing interfaces to the following hydrology models. You will see interfaces to these other hydrology models in future versions of StormNET:
- CUHP Colorado Urban Hydrograph Procedure
- LA County MODRAT2 (F0601)
- WWHM Western Washington Hydrology Model
- HEC-HMS
StormNET includes the latest NRCS (SCS) TR20 analysis model, allowing you to meet state and local regulatory requirements. In addition, the user can adjust the dimensionless unit hydrograph shape factor, selecting from pre-defined shape factors (i.e., Delmarva, etc.) or assigning user-defined shapes to match the local region’s hydrology.
Define your own
user-defined dimensionless unit hydrograph shape factor, or select from predefined shape factors |
 |
StormNET includes the latest NRCS (SCS) TR55 analysis model, allowing you to meet state and local regulatory requirements.
StormNET provides the user unparalleled modeling support for existing XPSWMM™ users and their models. StormNET can import XPSWMM models, as well as export XPSWMM models. Any changes made to the model made in StormNET can be exported back to XPSWMM or analyzed in StormNET. StormNET is based upon an enhanced version of the latest USEPA SWMM (and FEMA approved) stormwater and wastewater model.
To assist previous XPSWMM users in debugging their XPSWMM models, we have added an import log file. This import log file is created when you import a XPSWMM model into StormNET. This log file details some of the problems that were encountered in the XPSWMM model as well as what model parameters need to be reviewed in order for the StormNET results to more closely match that of XPSWMM.
StormNET has improved the ability to define intensity-duration-frequency (IDF) data for Rational, Modified Rational, and Dekalb Rational hydrology methods. The user can store the IDF data in an associated database, allowing the user to quickly re-use the data on subsequent stormwater projects. The user can define storm data using the following methods:
- IDF Table (direct entry of values for different return periods)
- LBDE Method
- Polynomial Method (ABCD coefficients)
- Direct entry of intensity
Easily define the
IDF data for the
model study area
being analyzed |
 |
StormNET will allow the user to define the components of land use and soil type areas that contribute runoff for a subbasin, causing StormNET to compute a composite curve number (CN) or runoff coefficient (Rc) for the subbasin. The user can select the appropriate CN and Rc values from a lookup table based upon land use and soil types. StormNET will then generate a report detailing the corresponding computations for agency submittal.
 |
StormNET allows the user to easily compute the composite curve number or runoff coefficient for a subbasin |
StormNET allows the user to define the runoff segments that make up the time of concentration (TOC), and will then automatically determine the resulting TOC. It will generate a detailed report showing the computed results, allowing the user submit the resulting report for agency review.
Easily compute SCS
TR55 time of concentration
for subbasins |
 |
StormNET can include stormwater inlets within its model, allowing you to automate your highway drainage design work. StormNET can simulate dual drainage systems (stormwater sewer network and city streets as dual conveyance pathways) and inlet capacity. It will quickly determine the amount of stormwater flow that is intercepted by the stormwater network inlets and the amount of stormwater flow that bypasses and is then routed further downstream to other inlets.
- Compare pre- and post-development hydrology
- US Federal Highway Administration (FHWA) HEC-22 computations included
- Select from standard curb openings, grated inlets, slotted inlets, median ditch inlets, and combination inlets
- Account for on sag and on grade conditions
- Lookup standard curb openings and grated inlets from major manufacturers and municipalities
- Compute gutter spread, depth of flow, inlet efficiency, inlet spacing, velocity of flow for gutter and pavement sections
- Submit agency-ready drainage report
 |
Complete
interconnected stormwater inlet computations, allowing modeling of stormwater sewer
network and city streets as dual drainage systems |
To provide more modeling capabilities to our users, we have added the following inlet types to our storm drain inlets:
- Gutter Depth Capture Curve
- Gutter Flow Capture Curve
- Maximum Capture Cutoff
 |
StormNET can model valves, inflatable rubber dams, bendable weirs, and other complex flow control structures. These flow control structures can be controlled by using user-defined control rules, allowing unlimited flexibility in the model definition.
StormNET has the ability to merge two or more separate StormNET models into a single model. This allows the user to break up a large project into separate sub-projects in order to expedite the model setup and development with additional staff.
StormNET allows you to merge two or more models into a single model, thereby saving you time in large modeling projects |
 |
 |
|
StormNET includes an updated Inflows dialog, allowing the user to define junction inflows at any location for additional inflow or pollutant loadings
Easy-to-use
Inflows dialog |
 |
The Rain Gages dialog now allows you to assign a defined rain gage to all subbasin`s. This allows you to create a rain gage without locating it on the Horizontal Plan View, and then assign that rain gage to all subbasins with one command. From the Rain Gages dialog, select the Assign button. StormNET will confirm whether to assign the current rain gage to all subbasins.
 |
StormNET includes an updated Unit Hydrographs dialog, allowing the user to easily define RDII (rainfall derived inflows and infiltration) inflows into the model. Short-term, medium-term, and long-term initial abstraction can be defined.
New Unit
Hydrographs dialog |
 |
StormNET includes a Rainfall Designer which allows the user to select any location within the USA and it will provide the design rainfall for the specified storm frequency. Alternatively, a user-defined rainfall can be specified. Then the appropriate storm distribution can be selected and the design storm is then created. Multiple design storms can be created and analyzed.
- Automatically determine design rainfall (based upon study location) for 1, 2, 5, 10, 25, 50, and 100 year return frequencies using StormNET’s site-specific storm distribution database with over 3,500 up-to-date rainfall recording stations across North America.
- Define any storm duration, multiple storm events
- Numerous storm distributions, including SCS, Huff, Eastern Washington, Florida, Chicago Storm, Hurricane Hazel, etc.
 |
Automatically determine
design rainfall using
StormNET’s site- specific
storm distribution database with over 3,500 up-to-date rainfall recording stations across North America |
Easily define pollutant buildup and washoff parameters, and quickly adjust parameters to see the affect for changes to water quality input data. StormNET includes data definitions for most common water quality constituents.
 |
StormNET will compute the necessary detention pond storage volume in order for post-developed conditions to match pre-development conditions. StormNET can compare existing conditions model results to post-development conditions, and compute the necessary storage volume to reduce outflow to pre-development conditions.
 |
StormNET can
compute the necessary storage volume required to reduce proposed conditions outflow to existing conditions
|
Detention ponds can be defined by either surface area or volume. StormNET will plot the resulting detention pond by both surface area and volume, allowing the user to quickly confirm the defined input data.
 |
StormNET allows
you to define detention
ponds by either surface
area or volume |
On-site, underground stormwater retention/detention can be incorporated into your StormNET model. Subsurface vaults or systems of large diameter interconnected storage pipes, arched pipes, or manufactured storage chambers can be modeled. StormNET includes standard storage chambers from leading manufacturers. Simply select the storage chamber model from a selection list, define the quantity, backfill dimensions, stone void space, and go!
 |
 |
Underground
pipe storage and storage chamber can be easily incorporated into your stormwater design |
StormNET can model infiltration basins, accounting for both pollutant removal and reduction of stormwater released from the basin. In addition, wet and dry retention ponds can be modeled. Infiltration (i.e. sometimes called “exfiltration”) is a downward entry of water into the surface of the soil as contrasted with percolation which is movement of water through soil layers. It is a loss of water from drainage network due to percolation or absorption into the surrounding soil.
StormNET supports following types of detention pond infiltration:
- Constant flow
- Constant rate, free surface area
- Constant rate, projected area
- Constant rate, wetted area
- Horton, free surface area
- Horton, projected area
- Horton, wetted area
Include infiltration
basins in
your stormwater model |
 |
- US Federal Highway Administration (FHWA) HEC-22 computations included
- Select from standard curb openings, grated inlets, slotted inlets, median ditch inlets, and combination inlets
- Account for on sag and on grade conditions
- Lookup standard curb openings and grated inlets from major manufacturers and municipalities
- Compute gutter spread, depth of flow, inlet efficiency, inlet spacing, velocity of flow for gutter and pavement sections
StormNET can include curb and gutter analysis in your stormwater model
|
 |
StormNET can save and reload the analysis results for reviewing at a later time. This allows the user to open the analysis results from a previous model run, thereby not having to re-run the analysis. This greatly speeds up work production on large models.
StormNET saves and
reloads
the analysis results for reviewing at a later time |
 |
This command can be used to move the network according to a specified transformation. This newly developed command is available within the Design Menu. This command can perform the following transformation operations:
- Shift Horizontal Coordinates
- Scale Horizontal Coordinates
- Adjust Elevations
This option shifts the network in the horizontal, and is useful when you need to horizontally translate a network so that it aligns with a standard coordinate system.
This option scales the network horizontal coordinates equally in the X and Y directions. A value less than 1.0 causes the network to be scaled smaller; a value greater than 1.0 causes the network to be scaled larger. This option also includes the ability to automatically recompute link lengths and subbasin areas.
This option raises the network node elevations up and down by a specified amount, and is useful when trying to have the defined network elevations match a particular datum.
 |
Many element dialogs include a match invert elevation [<] button, allowing you to quickly assign invert elevations to an element.
Quickly match
elevations
using the [<] button |
![Quickly match elevations using the [<] button](images/whats_new/match-elevations.gif) |
These display options allow you to display on the horizontal plan view those node that are flooded (in BLUE) or surcharged (in RED). Similarly, pipes can be shown as surcharged (in RED). This is useful to determine what parts of the network are undersized and having difficulty in managing the defined storm. These display options are available from the Display Options dialog for the Horizontal Plan View.
 |
To more efficiently browse the analysis results, the Bookmarks feature allows you to navigate directly to the output section of interest. No more need for scrolling up and down through the output, looking for the section of concern.
 |
All stormwater element dialogs have a new Summary Results section that details the model solution results. This allows the user to quickly see if an element is undersized or performing adequately. Elements that are not functioning properly, such as a storm sewer pipe that is undersized, is highlighted in RED so to allow the user to quickly identify that element.
 |
Quickly identify
undersized or inadequate stormwater network
elements—such as a manhole flooding or a sewer pipe surcharged |
The graphical capabilities of StormNET are unparalleled, providing horizontal plan plots, profile plots, and time series plots. On the horizontal plan plot, StormNET provides automatic color-coding of links and nodes based upon any input or output property, allowing the network to be color-coded based upon pipe sizes, flow rates, velocities, hydraulic grades, water quality concentrations, or any other attribute. Directional flow arrows can be plotted alongside the pipes to show the flow direction for any time step. Furthermore, pipes can be plotted with variable width and nodes with variable radius, allowing the user to quickly identify those areas of the network experiencing the most surcharge, flow, pollutant concentration, etc.
StormNET will automatically generate graphical animations for both horizontal plan plots and profile plots which show values that change with respect to time. Multiple animations can be performed simultaneously, allowing the user to plot several different profiles and watch all the results along that profile line, each in a separate window. Displays of multiple animation views are automatically synchronized.
Multiple time-series plots can be generated for various network elements, such as pipe flow, velocity, pollutant concentration, and loading. In addition, StormNET allows the user to display and compare multiple result files simultaneously as either horizontal plan plots, profile plots, or time-series plots, allowing direct comparison between different simulation models.
 |
StormNET can plot
analysis results on the
horizontal plan and can
generate profile plots,
hydrograph plots, and
animated plots
|
StormNET can plot analysis results directly on the profile plot, showing peak flows, depths, flood elevations, maximum velocities, etc. The profile plot can be animated to show the results varying with time.
From the profile plot, the user can click on element and quickly change the element’s definition. The user can then run the analysis and compare the results with the previous iteration of the model.
Included in the profile plot is a table of input data and output results. Profile plots include:
- Maximum HGL and EGL
- Maximum discharge
- Maximum flow depth
- Maximum flow velocity
- Pipe dimensions (sizes, inverts, etc.)
- Sump and rim elevations
Animated profile plots illustrate how additional storage can attenuate overflows
A more consistent Import and Export Menu has been developed. This helps new users more easily learn how to use the program without having to search all over the program for importing or exporting data.
 |
 |
StormNET can automatically create plan and profile drawings. This greatly speeds up the delivery of final deliverables associated with your engineering project. All elements are stored on their own individual layers, allowing the user to quickly change colors, line styles, text styles, etc. You can change the default settings, such as colors and annotations, to fit your corporate CAD standards.
 |
Easily export plan and profile drawings to AutoCAD
|
StormNET can export both input data and output results to Microsoft Excel, allowing the user ease-of-use in formatting analysis reports.
 |
View tabular data
within Microsoft Excel, including input data and analysis results
|
Leverage your AutoCAD® Land Desktop (LDD) and Civil 3D platform, by seamlessly sharing stormwater sewer and sanitary sewer design data with StormNET. Using LandXML, StormNET can directly incorporate your Land Desktop and Civil 3D design data into its stormwater and sanitary sewer model. Update a pipe size, invert elevation, sump elevation, or rim elevation, and have the updated change automatically reflect in the AutoCAD drawing. This sophisticated level of integration allows you to greatly increase your level of productivity.
|
|||||
 |
|||||
Easily share data from AutoCAD with StormNET |
|||||
StormNET allows the user to change the loaded CAD drawing layer colors and visibility.
 |
StormNET can automatically create plan and profile drawings. This greatly speeds up the delivery of final deliverables associated with your engineering project.
Profile sheets include:
- Maximum HGL and EGL
- Maximum discharge
- Maximum flow depth
- Maximum flow velocity
- Pipe dimensions (sizes, inverts, etc.)
- Sump and rim elevations
All elements are stored on their own individual layers, allowing the user to quickly change colors, line styles, text styles, etc. You can change the default settings, such as colors and annotations, to fit your corporate CAD standards.
 |
StormNET can export plan and profile drawings to AutoCAD
|
StormNET can share spatial data and visual representation of the stormwater and wastewater sewer network with any ArcGIS or MapInfo GIS database, allowing StormNET to be part of the stormwater and wastewater management and planning system. These capabilities can greatly assist in the decision-making processes for network asset inventory, rehabilitation requirements, and financial planning. StormNET can intelligently build a link to any GIS database structure, using attribute mapping and geocoding. For example, a manhole and sewer pipe can be represented as a node and arc in the originating GIS database while still being linked with StormNET. Also, StormNET solution results can be posted back to the original GIS database, allowing locations of CSO and SSO points, manhole overflows, pipe surcharging, and floodplain flooding to be quickly identified.
 |
Easily share data with ArcGIS
|
A command has been provided to automate the assignment of pipe inverts. This speeds up the definition of the stormwater network.
 |
Quickly assign pipe
invert elevations |
Users can now directly edit map coordinates of network elements on the Horizontal Plan View. Right click on an element (e.g., junction) and select Edit Coordinates from the popup menu. This feature allows a user to locate network elements with decimal precision accuracy.
 |
StormNET allows the user to define manhole rim elevation data by either elevation or maximum depth. Pipes inverts can be defined by elevation or offset from manhole bottom. Pipe diameters can be defined by either feet or inches.
StormNET includes support for the latest version of AutoCAD
StormNET is now Windows XP and Windows VISTA compliant for both admin and non-admin users.
