Overview

Features

Pricing

Testimonials

Capabilities

Downloads

Forums

Literature

Training

Support

Consulting

StormNET® is the most advanced, powerful, and comprehensive stormwater and wastewater modeling package available for analyzing and designing urban drainage systems, stormwater sewers, and sanitary sewers. StormNET is the only model that combines complex hydrology, hydraulics, and water quality in a completely graphical, easy-to-use interface. Both imperial and metric (SI) units are supported. Page 1 of 2  Easy Model Development Unparalleled Graphics Capability Network Analysis Components Backed by Industry Leaders Hydrology Modeling Capability Hydraulic Modeling Capability Interconnected Detention Pond Modeling

Compare StormNET to other hydrology software to see how it "stacks up."

Click for details

Download a free trial version of StormNET software and support utilities.

Click for details

Request a free CD-ROM containing the complete StormNET software, along with tutorials and user documentation.

Click for details

StormNET is easy to learn and use. StormNET models can be quickly developed using a variety of different sources. For
example, network components can be directly imported from ArcView, ArcInfo, MapInfo GIS, and can be interactively created using a mouse by simply pointing and clicking. Graphical symbols are used to represent network elements such as manholes, pipes, pumps, weirs, ditches, channels, and detention ponds. StormNET allows you, at any time, to interactively add, insert, delete, or move any network component, automatically updating the model. For example, selecting and moving a manhole automatically moves all connected pipes, ditches, channels, and pumps.

The graphical representation of the model can be output at any drawing scale. Pipes can be curvilinear and lengths automatically computed. Scanned TIFF aerial orthophoto images and maps; Mr. SID high-resolution orthophotos; ArcGIS, AutoCAD, and MicroStation files of streets, parcels, and buildings can be imported and displayed as a background image. This feature allows the user to quickly digitize a network model, confirm the network layout, or simply enhance the output modeling results. Moreover, the Network Element Inspector allows the user to point and click on any network manhole, pipe, pump, weir, ditch, channel, or detention pond from the horizontal plan view to quickly determine the defined input data and output modeling results.

Back To Top

StormNET’s graphical capabilities are unparalleled, providing multiple horizontal plan plots, profile plots—either of which can be animated to show the results over time—and time series hydrograph plots. All graphical plots can be customized and printed at any user-defined scale.

Back To Top

StormNET provides a variety of modeling elements to select from:

• Watershed subbasins
• Inlets & catchbasins
• Detention Ponds
• Complex outlet structures
• Standpipes, weirs & orifices
• Stormwater & wastewater sewers
• Pumps & lift stations
• Manholes & junctions
• Rivers, streams & ditches
• Culverts & bridges

StormNET is a link-node based model that performs hydrology, hydraulic, and water quality analysis of stormwater and wastewater drainage systems, including sewage treatment plants and water quality control devices. A link represents a hydraulic element (i.e., a pipe, channel, pump, standpipe, culvert, or weir) that transports flow and constituents. There are numerous different link element types supported by StormNET. A node can represent the junction of two or more links, the location of a flow or pollutant input into the system, or as storage element such as a detention pond, settling pond, or lake.

Back To Top

StormNET is approved by FEMA and all state and federal government agencies. StormNET’s SWMM analysis engine is a collaborative effort between Camp Dresser & McKee (CDM) and the U.S. Environmental Protection Agency (EPA). SWMM is the most widely applied stormwater and wastewater model in North America, with universal acceptance in the North American regulatory community and a dedicated SWMM user community that numbers in the thousands. CDM was one of the initial developers of SWMM, and has continued to support and enhance the engine over the years in conjunction with the EPA.

Back To Top

StormNET accounts for various hydrologic processes that produce runoff from urban areas, including:

• Time-varying rainfall
• Evaporation of standing surface water
• Snow accumulation and melting
• Rainfall interception from depression storage
• Infiltration of rainfall into unsaturated soil layers
• Percolation of infiltrated water into groundwater layers
• Interflow between groundwater and the drainage system
• Nonlinear reservoir routing of overland flow

Spatial variability in all of these processes is achieved by dividing a study area into a collection of smaller, homogeneous subcatchment areas, each containing its own fraction of pervious and impervious sub-areas. Overland flow can be routed between sub-areas, between subcatchments, or between entry points of a drainage system.

Back To Top

StormNET also contains a flexible set of hydraulic modeling capabilities used to route runoff and external inflows through the drainage system network of pipes, channels, storage/treatment units, and diversion structures. These include the ability to:

• Handle networks of unlimited size
• Use a wide variety of standard closed and open conduit shapes as well as natural channels
• Model special elements such as storage/treatment units, flow dividers, pumps, weirs, and orifices
• Apply external flows and water quality inputs from surface runoff, groundwater interflow, rainfall-dependent infiltration/inflow, dry weather sanitary flow, and user-defined inflows
• Utilize either kinematic wave or full hydrodynamic wave flow routing methods
• Model various flow regimes, such as backwater, surcharging, reverse flow, and surface ponding
• Apply user-defined dynamic control rules to simulate the operation of pumps, orifice openings, and weir crest levels

Back To Top

StormNET enables accurate routing in complex detention pond situations. In some situations, downstream conditions can cause backwater effects that influence the performance of a detention pond outlet structure. For example, an upstream pond may discharge to another downstream pond that is similar in elevation or influenced by downstream flooding. Such situations can result in a decrease in outlet discharges or flow reversal back into the pond and can be difficult to model properly. Most approaches attempt to simplify the problem using overly conservative assumptions about the downstream water surface conditions that result in oversized detention facilities and increased costs. Still other methods simply ignore the downstream effects, thereby resulting in overtopping of the resulting undersized ponds. However, StormNET’s interconnected pond routing allows you to easily model these complex situations with confidence.

Back To Top

Page 1 of 2