STORM Runoff event network analysis and design module which combines a powerful design engine with interactive drawing functions

What is Storm?

Storm is a runoff event network analysis and design module which combines a powerful design engine with interactive drawing functions.

Why Choose Storm?

DATABASE FILE FORMAT

The DBase file format allows rapid data access — find an entry in less than 0.25 seconds in a dataset of 20,000 records — and an un-limited model size. It also ensures compatibility with most geographic information systems and other programs.

GRAPHICAL FUNCTIONS

The graphical functions allow you to easily insert nodes and links, make changes to an existing layout by moving a node, change the flow direction or query a link with a click of the mouse.

MANHOLES AND CULVERTS

Manholes and culverts are displayed in WYSIWYG mode with user-defined line styles, colours and annotations such as manhole name, inlet level, depth, link type, link size, flow, velocity and capacity.

SIMULATE COMPLEX SYSTEMS

Combine new and existing culverts of multiple types and sizes in one model. Simulate the complex system of dual runoffs, partial flow capture, local storage, detention storage and overflows that are often found in modern towns and cities.

BITMAPS OR CADASTRAL BACKDROPS

View the network with a bitmap or cadastral backdrop. Or display the site contours and slope shading to decide on optimum network layout. Manholes and culverts are displayed in user-defined line styles and colours with optional input and design data.

ILLUDAS METHOD

The Illudas method allows you to use the standard Chicago storm or synthesize a storm from Intensity-Duration-Frequency curves.

Continuity equation or the Time Shift method

Flows are routed using the Continuity equation or the Time Shift method resulting in a solution which is 30% to 100% more cost-effective than simply adding the runoff peaks together.

Attenuate runoffs by means of reservoir routing

Attenuate runoffs by means of reservoir routing with full performance reporting. Reservoir results include a table of the water depth, inflow, outflow and storage for the duration of the runoff event as well as a graph of depth vs time indicating the full storage level.

GAIN INSIGHT TO THE SYSTEM

Once you have run the analysis the network can be displayed according to specific criteria such as flow or calculated size much as a GIS system would.

View the flow hydro-graphs of single or multiple culverts in order to gain an insight into the dynamics of the system. Thereafter you can generate drawings such as layout plans and long sections or calculate quantities.

SET UP GIS MODELS

The graphical functions make Storm ideal for setting up GIS models as you can transfer the data between Storm and our MAP module at any time.

SWMM IN CIVIL DESIGNER 6.4

The advanced Storm Water Management Model (SWMM) is now available on Beta testing in 6.4. This model represents a dynamic rainfall-runoff simulation that is used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas. The SWMM model was released by the US Environmental Protection Agency (EPA) and the graphical user interface has been developed to integrate with Civil Designer 6.4.

SWMM was first developed in 1971 and has undergone several major upgrades since then. It continues to be widely used throughout the world for planning, analysis and design related to storm water runoff, combined sewers, sanitary sewers, and other drainage systems in urban areas, with many applications in non-urban areas as well.

SWMM includes Hydrologic, Hydraulic and Water Quality Modeling Features. The Hydrologic Modeling Features account for various hydrologic processes that produce runoff from urban areas including evaporation, infiltration of rainfall into unsaturated soil layers and interflow between groundwater and drainage systems.

The program provides a comprehensive Storm Water Management tool with numerous applications ranging from the design and sizing of drainage system components for flood control to the evaluation of BMPs for reducing wet weather pollutant loadings.

Storm is the only analysis and design program for runoff events which combines a powerful design engine with drawing and terrain modeling functions.

 

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Storm Functions

 

DESIGN PARAMETERS

• Minimum and maximum velocity • Proportional flow depth • Minimum and maximum culvert slopes • Drops, defined steps, inverts common or soffits common in   manholes • Supports pipes, box culverts, portal culverts, open drains and   custom culverts such as parabolic channels • Define culvert type, size and flow characteristics • Fix culvert inlet level, slope or size at any point • Limit the flow in any culvert and direct the excess flow to another   manhole

 

	ILLUDAS TIME-AREA RUNOFF METHOD
• Chicago, triangular, rectangular or irregular storms • Storms from IDF curves • Infiltration Table allows calibration of soil types • Entry time calculators • Specify antecedent moisture condition

 

	RATIONAL FORMULA RUNOFF METHOD
| • Time of concentration calculator • Runoff factor calculators for rural and urban areas

 

	QUICK LONG SECTIONS
• Scroll through branch sections • Display up to 3 ground lines and selected design data • Graphically move manholes up or down

 

ANALYSIS AND DESIGN

• Comprehensive network design • Auto numbering of branches and manholes • Analyze the entire network, a sub-network, or just a portion • Runoff calculated with infiltration and surface losses • Complex system of local storage and/or overflows supports the dual   runoff model • Hydraulic calculations use internal dimensions for accuracy • Continuity or Time Shift routing • Calculates culvert size, slope, inlet and outlet levels, flow, capacity,   velocity, flow depth and hydraulic grade • View the hydrographs of single or multiple culverts

 

	QUANTITIES (SABS 1200)
• User-defined trench widths, depth increments and bedding classes • Uses overall culvert dimensions • Sorted by culvert type and size • Excavation length and volume • Bedding, backfill and selected backfill volumes • Manhole depths • Culvert lengths

 

	DRAWINGS
• Long sections of single or multiple culverts with crossing pipes on   single or multiple sheets • Plan layout with manhole and culvert annotations, schedule,   manhole coordinate and connectivity tables • Annotations such as manhole name, cover level, invert level, depth,   culvert type, size, length, slope, flow, capacity, velocity and flow   depth Back to top