Engineers searching for SWMM web app, EPANET online, HEC-RAS cloud, or run hydraulic models online are often forced into a compromise—either install heavy desktop software or settle for browser tools running WebAssembly (WASM) ports or JavaScript (JS) approximations that don't match the output of the real simulation engines.

HydroBOA removes that compromise entirely.

HydroBOA is a single, unified web app where engineers design SWMM, EPANET, and HEC-RAS models offline and run simulations in the cloud — all from one interface. It also includes automated optimization, calibration, and pipe design built directly into the platform.

What Makes HydroBOA Different?

HydroBOA is built on a hybrid architecture that separates design and computation. You design and edit models locally — even offline — and when you're ready, simulations run on cloud infrastructure using the actual government engines. One app, one workflow, three engine types.

Offline Design: Work Without Interruption

HydroBOA functions as an offline-capable app, allowing engineers to:

Create and edit SWMM, EPANET, and HEC-RAS models in a single workspace
Upload and manage model files across all project types — HydroBOA converts standard .inp files into its own .boa format, stored locally on-device or synced to the cloud
Work without continuous internet access
Maintain fast, responsive performance for all design tasks
Continue projects in the field or low-connectivity environments

Your workflow continues—regardless of connectivity.

Powered by the Official Government Simulation Engines

When you run a simulation, HydroBOA sends your model to dedicated cloud infrastructure where the official, unmodified engines execute it natively:

EPA SWMM 5.2.4 — the U.S. Environmental Protection Agency's stormwater and wastewater simulation standard, used worldwide for urban drainage design, flood routing, and regulatory compliance.
EPANET 2.2 — the EPA's water distribution network modeling engine for pipe network analysis, pressure zone design, and water quality simulation.
HEC-RAS — the U.S. Army Corps of Engineers' river analysis system for 1D and 2D flood modeling, bridge hydraulics, and floodplain mapping.

Every simulation result is fully compliant with U.S. federal, EPA, and industry standards. No WASM abstraction layers. No JS approximations. Native execution on dedicated cloud infrastructure, delivering the same numerical output as running these engines on your local machine.

Model Versioning and Dual-View Comparison

HydroBOA includes a built-in version control system for model files:

Every save creates a versioned snapshot — roll back to any previous state at any time
Dual file viewing lets you compare two versions side by side — before and after automated calibration, different optimization runs, or any two points in a model's history
Clash detection across different model types helps identify conflicts when working with overlapping SWMM, EPANET, and HEC-RAS networks in the same project area

No external version control tools or manual file naming required.

Built-In File Viewer

HydroBOA includes a view mode that opens most file types generated within the app — PDFs, simulation reports, exported documents, and project assets — without leaving the platform. No need to download files or switch to a separate application to review results.

Asset Management — Design and Manage in One Place

Most hydraulic engineering platforms treat model design and asset management as separate products with separate licenses. HydroBOA brings both into a single application:

Manage infrastructure assets alongside the models that simulate them
Track asset condition, metadata, and lifecycle within the same workspace used for design
No separate license, no separate software, no data export/import between systems

This is a capability no other hydraulic modeling platform offers in one app.

Mobile-First with Full GIS Capabilities

No licensed hydraulic modeling platform offers a mobile app with GIS-based model editing. Their mobile offerings are limited to dashboards, result viewers, or asset monitoring.

HydroBOA runs natively on iOS, Android, tablets, and desktops as a progressive web app. Engineers get the same GIS-powered editing environment on a phone in the field as they do on a workstation in the office — including map-based model construction, layer management, and geospatial analysis.

Automated Optimization, Calibration, and Pipe Design

HydroBOA integrates automated engineering workflows directly into the platform:

Automated model calibration for SWMM and EPANET models
Parameter optimization workflows to systematically improve model performance
Pipe sizing and design automation for water distribution networks
Reduced manual trial-and-error across all supported model types

All algorithms run server-side — your device stays free and you stay productive.

Built Around Real Engineering Workflows

Every feature in HydroBOA was designed around the tasks engineers actually perform daily:

Design stormwater, wastewater, water distribution, and river models in one place
Run simulations from any browser — results come back to the same interface
Visualize results on interactive maps with precision geospatial layers — satellite imagery, OpenStreetMap, custom rasters
Annotate models with sticky notes and track mandatory field completion across large networks
Export results to PDF, DOCX, PPTX, and standard GIS formats including shapefiles and GeoJSON

Key Features

One unified app for SWMM, EPANET, and HEC-RAS model design
Cloud simulation using official government engines
Offline-capable progressive web app (PWA)
Built-in automation — no programming required
Model versioning with dual-view comparison and clash detection
Integrated asset management — no separate license needed
Interactive profile plot editor — web and mobile
Full GIS-based editing on any device including phones and tablets
Built-in file viewer for PDFs, reports, and project assets
Interactive map visualization with geospatial layers
Export to PDF, DOCX, PPTX, shapefiles, and GeoJSON
Cross-platform access — Windows, macOS, Linux, Android, iOS
No installation required

Professional Comparison

Traditional Open-Source Desktop Tools

Manual installation and configuration per engine
Limited to local machine performance
No built-in automation — calibration and optimization require programming knowledge (Python, MATLAB, etc.) and significant coding effort
File-based workflows with manual handling
Separate software for each engine type
No model versioning or comparison tools
No asset management capability
Profile view is read-only — editing requires switching to property tables and dialog boxes
Desktop-only — no mobile or tablet support
Optimization and calibration tie up local hardware for hours or days

Licensed Desktop Platforms

Expensive licenses tied to specific hardware with limited remote flexibility
Automation often limited or requires external tools
Asset management sold as a separate product with its own license
No built-in model versioning or dual-view diff
Profile view limited to visualization in most tools — editing inverts and elevations requires separate property editors or plan views
No mobile app with GIS-based model editing
Long-running simulations and optimization consume local resources, leaving devices unavailable for other work

HydroBOA

One app for all three engine types
Offline design + cloud simulation
Uses real, unmodified government engines
Built-in automation — no programming required
Model versioning with dual-view comparison and clash detection
Integrated asset management — design and manage in one place
Interactive profile plot editor — adjust pipe inverts, node elevations, and geometry directly on the profile from any device
Full GIS-based model editing on any device — including phones and tablets
Simulations and optimization run server-side — freeing your device and your time to focus on other work

Why Hybrid Matters

Most hydraulic modeling tools fall into one of two categories: offline-only desktop tools that lack scalability and cross-device access, or cloud-only tools that depend entirely on connectivity and can't match real engine output.

HydroBOA combines both — design locally, simulate in the cloud, automate optimization — resulting in a more flexible, efficient, and reliable workflow.

The Future of Hydraulic Modeling

HydroBOA represents a shift toward web-based engineering platforms with cloud-powered simulation and integrated automation. One app that handles the full lifecycle — from model design to simulation to asset management to optimization — without switching tools or compromising on engine accuracy.

Get Started

HydroBOA enables engineers to move beyond installation-heavy, fragmented workflows into a single, scalable modeling environment.

One app. Offline design. Cloud simulation. Real engines. Automated optimization.

That's HydroBOA.