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Bentley CivilStorm V8i

CivilStorm accurately models every aspect of your stormwater system including rainfall, runoff, inlet capture and bypass, gravity and pressure piping, detention ponds, outlet structures, open channels, culverts, and more.

Engineers can analyze pressure and free-surface flow conditions for networks of channels and closed conduits; model complex pond outlets for a variety of tailwater conditions; and use weirs, orifices, culverts, risers, and inlet boxes in their design, all within a single product.

CivilStorm performs a full range of analysis necessary for verification of hydraulic capacity and demonstrating stormwater compliance in complex storm water handling systems. Its dynamic calculation engine handles capacity analysis, detention, looped systems and diversions.

Key new features in CivilStorm V8i (SELECTseries 3):


  • Common file format with other Bentley's sewer and stormwater products

With CivilStorm, StormCAD, SewerGEMS, and SewerCAD's new unified file format, the .stws file replaces the .csd, .stc, .swg, and .swc files. This common file format makes modeling teams workflows more efficient, since a model created in any one of these products can now be seamlessly opened and edited in another.

  • Updated support for MicroStation

You can run CivilStorm from within MicroStation V8i (SELECTseries 3).

A MicroStation license is required - if you don't have a MicroStation license, you can choose to run CivilStorm in its stand-alone mode.

  • Updated support for AutoCAD

You can run CivilStorm from within AutoCAD 2013 (32- and 64-bit).

An AutoCAD license is required - if you don't have an AutoCAD license, you can choose to run CivilStorm in its stand-alone mode.

  • i-models publishing

CivilStorm can now publish i-models (containers for the open exchange of infrastructure information) in 2D or 3D.


  • Multiple solvers

The StormCAD solver (gradually varied flow rational) is now included in CivilStorm, making CivilStorm a superset of StormCAD.

  • Automated design

CivilStorm now offers automated constraint-based design capabilities for storm sewers.

  • LID elements

Low-impact development (LID) controls can now be analyzed in CivilStorm.

  • HEC-22 inlet calculations

HEC-22 inlet capture efficiency calculations can be performed when using the SWMM solver in CivilStorm.

  • New gutter shapes

Support for v-shaped and parabolic gutters is now available in CivilStorm.

  • Node headloss

Node headloss calculations in accordance with HEC-22 3rd Edition are now available in CivilStorm.


  • Automated field filters

The input and results fields are automatically filtered according to the solver used.

About Bentley Systems, Incorporated

Bentley is the global leader dedicated to providing architects, engineers, geospatial professionals, constructors, and owner-operators with comprehensive software solutions for sustaining infrastructure. Bentley Systems applies information mobility to improve asset performance by leveraging information modeling through integrated projects for intelligent infrastructure. Its solutions encompass the MicroStation platform for infrastructure design and modeling, the ProjectWise platform for infrastructure project team collaboration and work sharing, and the AssetWise platform for infrastructure asset operations - all supporting a broad portfolio of interoperable applications and complemented by worldwide professional services. Founded in 1984, Bentley has more than 3,000 colleagues in 50 countries, more than $500 million in annual revenues, and since 2003 has invested more than $1 billion in research, development, and acquisitions.

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