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GeoSTORM®

Greatly speed up the process of creating, analyzing, and reviewing stormwater models

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CivilGEO industry awards — Spring 2026

Overview

Civil 3D Integrated Stormwater Software

GeoSTORM is a Civil 3D integrated stormwater software that accelerates the process of creating, analyzing, and reviewing stormwater models, supporting numerous stormwater hydrology methods. The software is designed to manage stormwater models with varying complexity.

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System Requirements

GeoSTORM Overview (video 01:30 minutes)

Work Faster with Automated Workflows​
  • Civil 3D Integration & Stormwater Element Catalog
  • Automated Engineering Workflows
  • Automated Engineering Report Creation
  • Automated CN & TOC Calculations
  • Automated Catchment Area Delineation
  • Interactive Detention Pond Sizing and Designing
  • Multiple Hydrology Methods Supported
  • Free Training & Engineering Project Assistance
  • 24×7 Technical Support

GeoSTORM Accelerates Your Engineering Process:

  • Utilize AutoCAD Civil 3D in Your Stormwater Layout   
  • Extend Civil 3D’s Stormwater Parts Catalog 
  • Implement Automated Engineering Workflows  
  • Delineate Catchment Areas Automatically  
  • Determine Subbasin RC, CN, Green Ampt Values in Minutes 
  • Compute Time of Concentration Values Automatically   
  • Utilize State DOT and Major Foundry Storm Drain Catch Basins  
  • Calculate Storm Sewer Pipe Capacity, HGL, EGL 
  • Design Detention Ponds and Outlet Structures Interactively 
  • Generate Stormwater Engineering Reports in Minutes 
  • Utilize AutoCAD Civil 3D in Your Stormwater Layout   
  • Extend Civil 3D’s Stormwater Parts Catalog 
  • Implement Automated Engineering Workflows  
  • Delineate Catchment Areas Automatically  
  • Determine Subbasin RC, CN, Green Ampt Values in Minutes 
  • Compute Time of Concentration Values Automatically   
  • Utilize State DOT and Major Foundry Storm Drain Catch Basins  
  • Calculate Storm Sewer Pipe Capacity, HGL, EGL 
  • Design Detention Ponds and Outlet Structures Interactively 
  • Generate Stormwater Engineering Reports in Minutes 

Advanced Workflows

Automated Engineering Workflows​: Accelerate stormwater design with intelligent workflow automation that builds complex models in hours instead of days. GeoSTORM handles repetitive tasks—pipe sizing, inlet placement, hydraulic grade line analysis—automatically maintaining engineering accuracy and consistency across projects while freeing you to focus on design decisions.

Automated Engineering Workflows

Accelerate stormwater design with intelligent workflow automation that builds complex models in hours instead of days. GeoSTORM handles repetitive tasks—pipe sizing, inlet placement, hydraulic grade line analysis—automatically maintaining engineering accuracy and consistency across projects while freeing you to focus on design decisions.

Civil 3D Integration​: Link directly to Civil 3D pipe networks for seamless design-to-analysis workflows. GeoSTORM reads your Civil 3D data—pipes, structures, inverts, materials—eliminating redundant entry and ensuring stormwater models automatically reflect current designs. Update once in Civil 3D, analyze immediately in GeoSTORM.

Civil 3D Integration

Link directly to Civil 3D pipe networks for seamless design-to-analysis workflows. GeoSTORM reads your Civil 3D data—pipes, structures, inverts, materials—eliminating redundant entry and ensuring stormwater models automatically reflect current designs. Update once in Civil 3D, analyze immediately in GeoSTORM.

CAD & GIS Integration: Work seamlessly within your preferred platform—AutoCAD, Civil 3D, MicroStation, or ArcGIS. GeoHECHMS integrates directly with CAD and GIS data, then exports completed models and results back to your design environment—eliminating data silos and maintaining unified project workflows.

CAD & GIS Integration

Work seamlessly within your preferred platform—AutoCAD, Civil 3D, MicroStation, or ArcGIS. GeoHECHMS integrates directly with CAD and GIS data, then exports completed models and results back to your design environment—eliminating data silos and maintaining unified project workflows.

Automated TOC & CN Calculations​: Automatically compute subbasin time of concentration, curve numbers, and runoff coefficients in seconds. GeoSTORM intelligently analyzes terrain data, land use coverage, and overland flow paths to generate accurate hydrologic parameters—transforming hours of manual calculations into instant results for faster project delivery.

Automated TOC & CN Calculations

Automatically compute subbasin time of concentration, curve numbers, and runoff coefficients in seconds. GeoSTORM intelligently analyzes terrain data, land use coverage, and overland flow paths to generate accurate hydrologic parameters—transforming hours of manual calculations into instant results for faster project delivery.

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Client Videos

Stiffler McGraw & Associates, Inc.

We were able to test multiple flow paths for more accurate time of concentration calculation. Delineating the subbasins for us, I believe also is just a tremendous time save and really helps us to be more accurate with our results.

Andreas Consulting Services

All the firms that do stormwater use the NRCS or SCS method of runoff, and this is already in the software. So, it’s very easy to use. I don’t know any software in my 47 years of engineering that can do what GeoSTORM can do.

Jones & Associates Consulting Engineers

Previously, using other software, it took me about 48 hours to complete a project. Using GeoSTORM, I was able to complete it in about 10 hours. GeoSTORM is very efficient.

See More Videos

Features

GeoSTORM features section highlighting support for multiple hydrology methods, with the software interface showing hydrologic setup and parameter selection over terrain data, alongside text describing methods such as Rational, Modified Rational, SCS TR-20/TR-55, EPA SWMM, CUHP, and SBUH for compliant stormwater design.
Multiple Hydrology Methods: Choose the right approach for every project with comprehensive hydrological method support—Rational Method, Modified Rational, SCS TR-20/TR-55, EPA SWMM, CUHP, SBUH, and more. GeoSTORM adapts to your regional requirements and design standards, ensuring regulatory compliance and engineering accuracy.

Multiple Hydrology Methods

Choose the right approach for every project with comprehensive hydrological method support—Rational Method, Modified Rational, SCS TR-20/TR-55, EPA SWMM, CUHP, SBUH, and more. GeoSTORM adapts to your regional requirements and design standards, ensuring regulatory compliance and engineering accuracy.

GeoSTORM automated catchment delineation showing a color-highlighted watershed boundary and drainage network over aerial terrain imagery, illustrating automatic identification of catchments and subbasins from elevation data for accurate runoff modeling.
Automated Catchment Delineation: Automatically delineate watersheds, subbasins, and catch basin inlets from diverse elevation data—Civil 3D surfaces, LiDAR, TINs, DEMs, survey data, and more. GeoSTORM intelligently analyzes terrain to generate precise drainage boundaries in minutes, eliminating manual digitizing and ensuring accurate runoff modeling.

Automated Catchment Delineation

Automatically delineate watersheds, subbasins, and catch basin inlets from diverse elevation data—Civil 3D surfaces, LiDAR, TINs, DEMs, survey data, and more. GeoSTORM intelligently analyzes terrain to generate precise drainage boundaries in minutes, eliminating manual digitizing and ensuring accurate runoff modeling.

Detention Pond Designing​: Rapidly size and design detention ponds, retention basins, underground storage chambers, and outlet control structures meeting multiple design criteria. GeoSTORM optimizes configurations for water quality, peak flow control, and storage volume requirements—generating construction-ready designs with automated calculations that ensure regulatory compliance and cost-effective solutions.

Detention Pond Designing

Rapidly size and design detention ponds, retention basins, underground storage chambers, and outlet control structures meeting multiple design criteria. GeoSTORM optimizes configurations for water quality, peak flow control, and storage volume requirements—generating construction-ready designs with automated calculations that ensure regulatory compliance and cost-effective solutions.

What-If Scenario Manager Analysis: Compare multiple scenarios side-by-side, including existing versus proposed conditions and design alternatives. Evaluate different detention sizing options, pipe routing schemes, or LID strategies to quickly identify the most cost-effective and compliant solution for your project.

What-If Scenario Manager Analysis

Compare multiple scenarios side-by-side, including existing versus proposed conditions and design alternatives. Evaluate different detention sizing options, pipe routing schemes, or LID strategies to quickly identify the most cost-effective and compliant solution for your project.

Automated Design Storm Assignment: Automatically retrieve precipitation depths and storm distributions for 1 to 500-year events across the USA, Canada, and many European countries. GeoSTORM queries authoritative databases by project location—eliminating manual atlas lookups and ensuring regional code compliance for accurate, defensible hydrologic design.

Automated Design Storm Assignment

Automatically retrieve precipitation depths and storm distributions for 1 to 500-year events across the USA, Canada, and many European countries. GeoSTORM queries authoritative databases by project location—eliminating manual atlas lookups and ensuring regional code compliance for accurate, defensible hydrologic design.

Roadway catch basin inlet design example showing a curb inlet with grated storm drain along a residential street, illustrating inlet capture efficiency, gutter flow, and roadway drainage performance for compliant stormwater design.
Roadway Catch Basin Inlet Design: Optimize inlet performance with automated catch basin analysis calculating capture efficiency, bypass flow, and gutter spread. Select from comprehensive catalogs of major US and Canadian foundry manufacturers and state DOT standards—ensuring code compliance while minimizing street flooding and maximizing drainage system efficiency.

Roadway Catch Basin Inlet Design

Optimize inlet performance with automated catch basin analysis calculating capture efficiency, bypass flow, and gutter spread. Select from comprehensive catalogs of major US and Canadian foundry manufacturers and state DOT standards—ensuring code compliance while minimizing street flooding and maximizing drainage system efficiency.

Underground detention storage system installation showing corrugated plastic chambers placed in an excavated trench, illustrating underground detention storage design for stormwater volume control, modular systems, and construction-ready drainage solutions.
Underground Detention Storage Design​: Design and analyze underground detention systems for multiple design criteria with interactive 3D modeling. Select from comprehensive manufacturer libraries—ADS, Cultec, and more—then automatically generate construction drawings and engineering calculations. Deliver complete AutoCAD plans and professional reports in minutes, not hours.

Underground Detention Storage Design

Design and analyze underground detention systems for multiple design criteria with interactive 3D modeling. Select from comprehensive manufacturer libraries—ADS, Cultec, and more—then automatically generate construction drawings and engineering calculations. Deliver complete AutoCAD plans and professional reports in minutes, not hours.

Automated sequential naming feature illustrated with numbered and color-coded arrow icons, representing automatic, customizable naming of pipes, structures, inlets, and network elements to maintain consistent organization across large stormwater models.
Automated Sequential Naming: Automatically name pipes, structures, inlets, and other elements using customizable conventions—sequential numbering, routing distance, or location-based schemes. GeoSTORM maintains consistent organization across hundreds of elements, eliminating tedious manual labeling while ensuring clear communication across design teams and simplifying future model updates.

Automated Sequential Naming

Automatically name pipes, structures, inlets, and other elements using customizable conventions—sequential numbering, routing distance, or location-based schemes. GeoSTORM maintains consistent organization across hundreds of elements, eliminating tedious manual labeling while ensuring clear communication across design teams and simplifying future model updates.

GeoSTORM digital terrain cross-section cutting interface showing routing reaches and automatically extracted cross sections over a colored elevation surface, illustrating accurate channel profile generation from LiDAR, TIN, and surface data for hydraulic modeling.
Digital Terrain Cross Section Cutting​: Automatically extract routing reach cross sections from diverse terrain sources—Civil 3D surfaces, MicroStation surfaces, TINs, DTMs, LiDAR, and more. GeoSTORM generates accurate channel profiles instantly, eliminating manual digitizing while ensuring hydraulic models precisely reflect field conditions for reliable flood analysis.

Digital Terrain Cross Section Cutting

Automatically extract routing reach cross sections from diverse terrain sources—Civil 3D surfaces, MicroStation surfaces, TINs, DTMs, LiDAR, and more. GeoSTORM generates accurate channel profiles instantly, eliminating manual digitizing while ensuring hydraulic models precisely reflect field conditions for reliable flood analysis.

GeoSTORM MDI multiple model editing interface showing side-by-side stormwater models over aerial imagery, with drainage networks, catchments, and routing elements displayed concurrently to compare alternatives and manage multiple projects within a single workspace.
MDI Multiple Model Editing: Work on multiple projects without switching applications. GeoSTORM lets you load, edit, and run multiple stormwater models simultaneously—compare alternatives side-by-side, manage different project phases, or keep client work organized. Boost productivity with true multi-model and multi-project capability that other software lacks.

MDI Multiple Model Editing

Work on multiple projects without switching applications. GeoSTORM lets you load, edit, and run multiple stormwater models simultaneously—compare alternatives side-by-side, manage different project phases, or keep client work organized. Boost productivity with true multi-model and multi-project capability that other software lacks.

Professional report generation concept image showing a business professional interacting with digital charts and analytics icons, representing automated creation of polished, agency-ready stormwater reports in Microsoft Word and Excel with comprehensive, formatted results.
Professional Report Generation: Generate polished, agency-ready reports automatically in Microsoft Word and Excel. GeoSTORM creates comprehensive documentation including subbasin results, pipe network tables, inlet schedules, stormwater profiles, and more—all professionally formatted to your specifications for immediate submittal and client presentation.

Professional Report Generation

Generate polished, agency-ready reports automatically in Microsoft Word and Excel. GeoSTORM creates comprehensive documentation including subbasin results, pipe network tables, inlet schedules, stormwater profiles, and more—all professionally formatted to your specifications for immediate submittal and client presentation.

GeoSTORM fully customizable report templates interface showing a report preview with watershed maps and tables, illustrating customizable layouts, branding options, and selectable content for consistent, agency-ready stormwater reporting across projects.
Fully Customizable Report Templates: Tailor reports to meet any agency’s standard or client requirement. Customize layouts, add company branding, include specific data tables, and control what information appears. Save templates for consistent deliverables across all your projects.

Fully Customizable Report Templates

Tailor reports to meet any agency’s standard or client requirement. Customize layouts, add company branding, include specific data tables, and control what information appears. Save templates for consistent deliverables across all your projects.

GeoSTORM automated reporting workflow showing report generation within the software alongside a populated Microsoft Word document, illustrating elimination of manual copy-paste by automatically updating reports with current model data, maps, tables, and graphs.
Eliminate Manual Report Assembly: Stop copying and pasting stormwater analysis results into documents. GeoSTORM automatically populates your reports with current model data, graphs, and images. When your model changes, regenerate updated reports in seconds—not hours.

Eliminate Manual Report Assembly

Stop copying and pasting stormwater analysis results into documents. GeoSTORM automatically populates your reports with current model data, graphs, and images. When your model changes, regenerate updated reports in seconds—not hours.

GeoSTORM integrated cloud-based mapping interface showing access to online mapping services and datasets over aerial imagery, illustrating built-in retrieval of LiDAR elevation data, FEMA flood maps, watershed boundaries, soils, and land use information for streamlined stormwater modeling.
Integrated Cloud-Based Mapping: Access comprehensive cloud-based mapping services and authoritative data directly within GeoSTORM—including high-resolution LiDAR elevation data, FEMA flood maps, watershed delineation, soil classifications, land use datasets, and more. Eliminate time-consuming data collection and start modeling immediately with everything integrated.

Integrated Cloud-Based Mapping

Access comprehensive cloud-based mapping services and authoritative data directly within GeoSTORM—including high-resolution LiDAR elevation data, FEMA flood maps, watershed delineation, soil classifications, land use datasets, and more. Eliminate time-consuming data collection and start modeling immediately with everything integrated.

Included High-Resolution Elevation Data: Start modeling immediately with built-in high-resolution 1-meter elevation data covering the USA, Canada, Europe, and more. GeoSTORM eliminates costly elevation data purchases and time-consuming imports—providing accurate, survey-grade terrain information ready to use the moment you launch your project.

Included High-Resolution Elevation Data

Start modeling immediately with built-in high-resolution 1-meter elevation data covering the USA, Canada, Europe, and more. GeoSTORM eliminates costly elevation data purchases and time-consuming imports—providing accurate, survey-grade terrain information ready to use the moment you launch your project.

Aerial view illustrating integrated land use coverage, showing mixed residential, commercial, industrial, and open space areas used to automatically derive imperviousness, curve numbers, and runoff parameters for stormwater modeling.
Included Land Use Coverage: Access comprehensive land use coverage for the USA, Canada, Europe, Australia, and beyond—built right in. Instantly compute composite curve numbers, time of concentration, lag times, and imperviousness without purchasing external datasets. Start modeling immediately with authoritative global data at your fingertips.

Included Land Use Coverage

Access comprehensive land use coverage for the USA, Canada, Europe, Australia, and beyond—built right in. Instantly compute composite curve numbers, time of concentration, lag times, and imperviousness without purchasing external datasets. Start modeling immediately with authoritative global data at your fingertips.

Included Imperviousness Coverage: GeoSTORM includes global impervious surface datasets spanning the USA, Canada, Europe, Australia, and more. Eliminate time-consuming manual work and expensive data purchases. Accurately determine imperviousness percentages, refine curve number calculations, and improve runoff estimates using high-quality built-in coverage for your project location.

Included Imperviousness Coverage

GeoSTORM includes global impervious surface datasets spanning the USA, Canada, Europe, Australia, and more. Eliminate time-consuming manual work and expensive data purchases. Accurately determine imperviousness percentages, refine curve number calculations, and improve runoff estimates using high-quality built-in coverage for your project location.

GeoSTORM automated runoff coefficient (RC) and curve number (CN) calculation interface showing land use–based parameter tables and color-coded GIS surfaces, illustrating instant computation of hydrologic parameters such as CN, imperviousness, and infiltration values for accurate stormwater modeling.
Automated RC & CN Calculations: Calculate composite runoff coefficients, SCS curve numbers, Green-Ampt parameters, and imperviousness using AI-powered aerial imagery analysis, GIS land use data, or manual delineation. GeoSTORM’s flexible approach delivers accurate hydrologic parameters instantly—whether automating large watersheds or fine-tuning specific areas for engineering precision.

Automated RC & CN Calculations

Calculate composite runoff coefficients, SCS curve numbers, Green-Ampt parameters, and imperviousness using AI-powered aerial imagery analysis, GIS land use data, or manual delineation. GeoSTORM’s flexible approach delivers accurate hydrologic parameters instantly—whether automating large watersheds or fine-tuning specific areas for engineering precision.

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Additional Features

Critical Storm Analysis:​ Perform simultaneous critical storm analysis in minutes across multiple storm frequencies, distributions, and durations. The software automatically evaluates all combinations to identify the critical design storm—eliminating manual iteration and saving hours of analysis time.

Critical Storm Analysis

Perform simultaneous critical storm analysis in minutes across multiple storm frequencies, distributions, and durations. The software automatically evaluates all combinations to identify the critical design storm—eliminating manual iteration and saving hours of analysis time.

HEC-RAS and HEC-HMS support section highlighting GeoHECHMS capabilities, with US Army Corps of Engineers HEC branding and text describing direct HEC-HMS stormwater modeling, data compatibility, and modernization of legacy HEC-1 projects.
Seamlessly Share Data with HEC-RAS: Seamlessly migrate GeoSTORM results to GeoHECRAS for accelerated workflows. Complete land development projects, roadway design, bridge and culvert replacements, and flood study projects faster with integrated data transfer—eliminating redundant data entry and ensuring consistency across stormwater and hydraulic models.

Seamlessly Share Data with HEC-RAS

Seamlessly migrate GeoSTORM results to GeoHECRAS for accelerated workflows. Complete land development projects, roadway design, bridge and culvert replacements, and flood study projects faster with integrated data transfer—eliminating redundant data entry and ensuring consistency across stormwater and hydraulic models.

XPSWMM drainage network model imported into GeoSTORM, showing pipe networks, catchments, and preserved stormwater design parameters.
XPSWMM Model Support: Import previously developed XPSWMM models directly into GeoSTORM while preserving all model data and parameters. Protect your modeling investment and avoid costly rework—GeoSTORM maintains complete fidelity of pipe networks, catchment areas, runoff coefficients, and design parameters.

XPSWMM Model Support

Import previously developed XPSWMM models directly into GeoSTORM while preserving all model data and parameters. Protect your modeling investment and avoid costly rework—GeoSTORM maintains complete fidelity of pipe networks, catchment areas, runoff coefficients, and design parameters.

FEMA Approved Software: GeoSTORM is FEMA-approved for National Flood Insurance Program (NFIP) studies, ensuring regulatory compliance and acceptance by federal agencies, municipalities, and reviewing authorities nationwide. Submit stormwater and flood analyses with confidence, backed by software trusted for critical infrastructure projects and official floodplain mapping.

FEMA Approved Software

GeoSTORM is FEMA-approved for National Flood Insurance Program (NFIP) studies, ensuring regulatory compliance and acceptance by federal agencies, municipalities, and reviewing authorities nationwide. Submit stormwater and flood analyses with confidence, backed by software trusted for critical infrastructure projects and official floodplain mapping.

Stormwater project visualization overlaid on Google Maps and high-resolution aerial imagery for real-world site analysis.
Work Directly on the Map​: Overlay Google Maps and high-resolution aerial imagery directly onto your stormwater projects. Visualize stormwater infrastructure in real-world context, validate designs against actual site conditions, and produce compelling project deliverables.

Work Directly on the Map

Overlay Google Maps and high-resolution aerial imagery directly onto your stormwater projects. Visualize stormwater infrastructure in real-world context, validate designs against actual site conditions, and produce compelling project deliverables.

Infinity loop icon representing unlimited undo and redo functionality in stormwater design software.
Unlimited Undo and Redo: Easily correct mistakes and explore design alternatives with full unlimited Undo and Redo capability. Make changes confidently knowing you can instantly reverse any edit, from simple stormwater pipe replacements to complex stormwater network modifications.

Unlimited Undo and Redo

Easily correct mistakes and explore design alternatives with full unlimited Undo and Redo capability. Make changes confidently knowing you can instantly reverse any edit, from simple stormwater pipe replacements to complex stormwater network modifications.

Stormwater detention pond and surrounding neighborhood visualized in 2D and 3D views for accurate stormwater design and elevation verification.
2D & 3D Viewing and Editing​: View your stormwater model in both 2D plan view and immersive 3D to gain complete project understanding. Switch seamlessly between 2D plan view for precise design work and 3D visualization for verifying elevations, identifying conflicts, and communicating designs to stakeholders.

2D & 3D Viewing and Editing

View your stormwater model in both 2D plan view and immersive 3D to gain complete project understanding. Switch seamlessly between 2D plan view for precise design work and 3D visualization for verifying elevations, identifying conflicts, and communicating designs to stakeholders.

Digital twin stormwater model illustrating a curb inlet and drainage system connected to a synchronized virtual infrastructure model.
Digital Twin Stormwater Model​: Build Digital Twin workflows connecting design, engineering, and operations teams. Create a synchronized virtual model that evolves from design, construction, to maintenance—reducing errors and miscommunication across all teams.

Digital Twin Stormwater Model

Build Digital Twin workflows connecting design, engineering, and operations teams. Create a synchronized virtual model that evolves from design, construction, to maintenance—reducing errors and miscommunication across all teams.

Water resources engineer providing expert technical support for stormwater modeling and design software.
Expert Technical Support​: Extend your engineering team with unlimited 24/7 toll-free support from experienced water resource engineers—not just software technicians. Get expert guidance on complex stormwater problems, modeling challenges, and design questions whenever you need it, at no additional cost.

Expert Technical Support

Extend your engineering team with unlimited 24/7 toll-free support from experienced water resource engineers—not just software technicians. Get expert guidance on complex stormwater problems, modeling challenges, and design questions whenever you need it, at no additional cost.

Interactive training and engineering assistance interface representing free training and expert guidance for stormwater modeling software.
Free Training & Engineering Assistance: Receive complimentary training tailored to your projects along with expert guidance from water resource engineers who support you from initial setup through project completion. Ensure your team is immediately productive and equipped with best practices for successful, efficient project execution.

Free Training & Engineering Assistance

Receive complimentary training tailored to your projects along with expert guidance from water resource engineers who support you from initial setup through project completion. Ensure your team is immediately productive and equipped with best practices for successful, efficient project execution.

AI-powered engineering assistance illustrated by a digital brain and processor, representing real-time support for stormwater modeling and simulation.
AI-Powered Engineering Assistance​: Leverage AI-powered engineering assistance for real-time support with project review, simulation troubleshooting, and modeling questions. Get instant solutions to technical challenges and guidance based on engineering best practices—helping you work faster and more confidently.

AI-Powered Engineering Assistance

Leverage AI-powered engineering assistance for real-time support with project review, simulation troubleshooting, and modeling questions. Get instant solutions to technical challenges and guidance based on engineering best practices—helping you work faster and more confidently.

64-bit multi-core processor illustrating high-performance computing for large and complex stormwater modeling projects.
Powerful 64-bit, Multi-Core Support​: Handle larger, more demanding projects efficiently with powerful 64-bit, multi-core, parallel processing capabilities. Process extensive stormwater networks, perform complex stormwater calculations, and run critical storm analyses significantly faster.

Powerful 64-bit, Multi-Core Support

Handle larger, more demanding projects efficiently with powerful 64-bit, multi-core, parallel processing capabilities. Process extensive stormwater networks, perform complex stormwater calculations, and run critical storm analyses significantly faster.

What makes GeoSTORM different?

Here’s a quick overview of how our features compare to our competitors.
Capability GeoSTORM HydroCAD Bentley StormCAD Autodesk
InfoWorks ICM 		Autodesk InfoDrainage PCSWMM
AutoCAD, MicroStation & ESRI ArcGIS Compatible Interface Limited Limited
Civil 3D Drawings, Terrains, Pipe Networks Integration
Automated Time of Concentration Calculations
Automated RC, CN & Green Ampt Calculations
Automated Watershed & Catch Basin Delineation
Stormwater Parts Catalog
Import Survey, LiDAR, and Other Data Support Limited Limited Limited
Automated Underground Storage Chamber Designer Limited Limited Limited
Worldwide High-Resolution Elevation Data
Digital Terrain Modeling and Modification
Automated Design Storm Assignment
Automated Sequential Naming
24×7 Toll Free Technical Support
Free Engineering Project Assistance

Client Videos

Stiffler McGraw & Associates, Inc.

We were able to test multiple flow paths for more accurate time of concentration calculation. Delineating the subbasins for us, I believe also is just a tremendous time save and really helps us to be more accurate with our results.

Andreas Consulting Services

All the firms that do stormwater use the NRCS or SCS method of runoff, and this is already in the software. So, it’s very easy to use. I don’t know any software in my 47 years of engineering that can do what GeoSTORM can do.

Jones & Associates Consulting Engineers

Previously, using other software, it took me about 48 hours to complete a project. Using GeoSTORM, I was able to complete it in about 10 hours. GeoSTORM is very efficient.

Client Testimonials

Case Studies

Other Case Studies

Jones & Associates Consulting Engineers

Tyson Roper of Jones & Associates Consulting Engineers in South Ogden, Utah, is highly knowledgeable about water engineering and its many complex….

Read More

Aquafor Beech Ltd.

The compatibility of GeoHECRAS with GIS and other applications like PCSWMM makes the pre- and post-processing aspects….

Read More

Stormwater Management Consulting

The use of GeoHECRAS for floodplain delineation has resulted in significant time and cost savings as well. Skupien notes that….

Read More

See More Case Studies

Most Popular

For Individuals and Small Teams

Starter Plan
For small urban drainage systems, including highway drainage analysis and design.
Request Pricing
Most Popular

For Medium Sized Teams

Standard Plan

For most common urban stormwater modeling analysis and design conditions.

Includes all capabilities contained in the Starter Plan.

Request Pricing

Most Popular

For Large Teams

Professional Plan

For complex 1D and 2D urban and rural stormwater models, and much more.

Includes all capabilities contained in the Starter Plan and Standard Plan.

Request Pricing

GeoSTORM Plans Comparison

GeoSTORM is available in different sizes and options to be able to tackle simple to complex urban stormwater systems.

General Features

Starter

Standard

Professional
Unlimited Undo & Redo


Easily correct mistakes with unlimited Undo and Redo capability.

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2D & 3D Viewing and Editing


Shift seamlessly between 2D and 3D viewing perspectives to identify modeling issues and make required changes.

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Work Simultaneously on Multiple Projects


Work with multiple projects simultaneously including copying and pasting data between projects.

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Automated Report Generation


Comprehensive, easy-to-read stormwater project reports generated in Microsoft Word and Excel, customized to meet reviewing agency and project requirements.

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Automated Engineering Workflows


Numerous workflow automation tools offer more efficient ways to create and maintain engineering models.

Limited

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24×7 Expert Technical Support


Toll-free 24-hour 7-day a week unlimited technical support by experienced engineers. They are just a phone call, Zoom, or MS Teams meeting away, ready to answer your modeling questions and assist you with your engineering projects.

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Built-In Modeling Assistant


Intelligent AI-powered modeling assistance is provided to assist with modeling questions and project troubleshooting.

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Integrated Cloud-Based Mapping Services


Provided underlying soil and land use cover data can be used to compute and assign Manning’s overland roughness, curve numbers (CN), runoff coefficients (RC) and more.

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Worldwide 3D Elevation Data


Make use of integrated high-resolution 1-meter digital elevation terrain data for USA, Canada, Europe, and other regions.

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AutoCAD & MicroStation Drawing Support


Integrate AutoCAD and Bentley MicroStation drawing files directly into your project.

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Google Earth Support


Export completed stormwater model input data and output results directly to Google Earth.

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Link Elements


Total number of pipes, routing reaches and roadway gutters supported.

Up to 20

Up to 100

Unlimited

Modeling Capabilities

Starter

Standard

Professional
What-If Scenario Manager Analysis


Compare different engineering simulations, such as existing and proposed conditions, allowing quick evaluation of design alternatives.

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Rational & Modified Rational Method


Utilize Rational Method and Modified Rational Method for stormwater runoff computations.

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SCS TR-20/TR-55


Utilize SCS TR-20 and TR-55 for stormwater runoff computations.

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Catch Basin Modeling


Included catch basin catalog which includes Neenah, East Jordan, OldCastle, Olympic and other foundries, as well as state DOTs, city and county catch basins allows quick sizing and designing of roadway stormwater inlets.

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Denver CUHP


Complete workflow automation support for the Denver region Colorado Urban Hydrograph Procedure (CUHP) stormwater runoff and routing computations.

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Santa Barbara Unit Hydrograph Method


Utilize Santa Barbara Unit Hydrograph (SBUH) for stormwater runoff computations.

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Irregular Cross Section Geometry


Extract routing reach cross section geometry from 3D digital elevation terrain data.

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FEMA Approved NFIP Stormwater Modeling


FEMA approved for NFIP stormwater and flood projects.

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EPA SWMM Hydrology


Complete support for EPA SWMM is provided.

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XPSWMM Model Support


Import XPSWMM models to support and maintain existing and legacy stormwater projects.

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Legacy Pipe Shapes (non-circular pipes)


Support for non-circular pipes, such as arch, pipe arch, egg, basket handle and other pipe shapes.

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Green Infrastructure Support


Test out different combinations of green infrastructure elements, like rain gardens, bioswales, infiltration trenches, permeable pavement, and more to determine runoff capture effectiveness.

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Pumping


Support for pumping, including control rules for managing pumps.

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Automated Critical Storm Computation


Perform simultaneous critical storm analysis in just minutes, examining different storm frequencies and durations.

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Advanced Features

Starter

Standard

Professional
Automated Design Storm Assignment


Automatically determine 1, 2, 5, 10, 25, 50, 100, and 500-year precipitation and storm distributions based upon project location.

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Automated TOC Computations


Automatically calculate subbasin TOC (Time of Concentration) using a variety of methods and computed terrain surface flow paths.
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Automated RC, CN & Green Ampt Calculations


Compare different engineering simulations, such as existing and proposed conditions, allowing quick evaluation of design alternatives.

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Automated Subbasin & Catch Basin Delineation


Quickly delineate watersheds, subbasins, and catch basin capture areas from 3D digital elevation terrain data, including AutoCAD Civil 3D surfaces, MicroStation surfaces, LIDAR, TINs, DEMs, survey data, and more.

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AutoCAD Civil 3D Model Support


Seamlessly import and export stormwater pipe network models from and to AutoCAD Civil 3D.

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ArcGIS Support


Seamlessly import and export stormwater models from and to ArcGIS.

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Terrain Modeling


Quickly create digital representations of existing and proposed ground topography using the included terrain modeling tools.

Limited

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Underground Storage Chamber Design Tool


Select elements from major storage chamber manufacturers, interactively size and design underground storage chambers and generate construction documentation and engineering reports.

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Detention Pond Designer


Quickly size and design detention ponds, retention ponds, underground storage chambers, and corresponding outlet structures for different design storms and engineering criteria.

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FEMA Flood Mapping Data


Provided high-resolution FEMA mapping data can be included directly in the project.

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