We're thrilled to announce the general availability of HydraLink 1.0 — a modern desktop application for stormwater hydrology and hydraulics modeling.
HydraLink was built from the ground up to replace the patchwork of aging, disconnected tools that civil and water resources engineers have been forced to cobble together for decades. One application. One model. One report.
What You Can Do with HydraLink
Complete Rainfall-Runoff Analysis
HydraLink supports the hydrology methods your jurisdiction requires — all in one place:
- SCS Unit Hydrograph with Clark, Modified Clark, and Snyder transform methods
- SCS Curve Number and Green-Ampt infiltration loss methods
- Rational and Modified Rational Methods with weighted C coefficients and critical duration analysis
- NOAA Atlas 14 integration — enter your coordinates and HydraLink pulls precipitation data directly, with IDF curve fitting across all standard return periods and durations
- TR-55 time of concentration with sheet flow, shallow concentrated flow, and channel flow segments
Network-Based Drainage Modeling
Build your stormwater network visually on an interactive map. Connect basins, reaches, junctions, ponds, culverts, and channels into a complete drainage model with automatic upstream/downstream linking.
- Reach routing via Muskingum, Muskingum-Cunge, Modified Puls, Lag, and Kinematic Wave methods
- Hydrograph superposition at junctions with full network solving
- Multi-plan projects — compare pre-development vs. post-development, or evaluate multiple design alternatives side by side
Detention Pond Design & Analysis
Size and route detention ponds with a full suite of outlet structures:
- Riser orifices (circular and rectangular, with partially submerged flow)
- Weirs (rectangular, V-notch, Cipolletti, broad-crested, sharp-crested)
- Spillways with multiple geometry options
- Exfiltration/infiltration modeling using Darcy's law with soil-specific parameters from the Green-Ampt table
- Underground chamber storage support for manufactured systems
- Modified Puls routing with elevation-area-discharge table generation
- Custom stage-storage and stage-discharge curves
Culvert & Channel Hydraulics
Analyze culverts with methods aligned to FHWA Hy-8 v7.7, including:
- Inlet and outlet control analysis with 15+ entrance type configurations
- Circular and box culvert shapes with multiple barrel support
- Road overtopping weir analysis and tailwater condition handling
- Channel capacity analysis for rectangular, trapezoidal, V-shaped, and user-defined cross-sections
Spatial Data & Map Integration
Work directly on an interactive map with full coordinate system support:
- Import Shapefiles, GeoJSON, and LandXML boundary files with automatic CRS detection
- Custom projection support via EPSG code or WKT
- Boundary layer styling and attribute preservation
Professional Report Generation
Generate submittal-ready reports with a single click:
- PDF reports with formatted tables, basin breakdowns, routing results, pond analysis, and culvert summaries
- Word (DOCX) reports for easy editing and agency review
- Multi-plan reports with section organization by element type
Built for Productivity
- Preset libraries — save and reuse storm events, pond configurations, and Rational C tables across projects
- Multi-plan comparison with linked elements across scenarios
- Undo/Redo support
- Clean, modern interface with ribbon toolbar and context menus
Why HydraLink?
Most engineers today juggle HEC-HMS, Hy-8 for culverts, a spreadsheet for pond routing, and another spreadsheet for the Rational Method — then manually stitch results together into a report. HydraLink eliminates that workflow entirely.
One integrated model. Validated results. Professional output. No more copying numbers between applications.
Coming Soon: HydraStorm
We're also working on HydraStorm — a companion application to HydraLink designed for storm drain design and analysis inside AutoCAD Civil 3D.
HydraStorm takes the calculated flows from your HydraLink model and puts them to work in Civil 3D, giving you tools to quickly size, evaluate, and update storm drain pipes without leaving your design environment. If HydraLink answers "how much water?", HydraStorm answers "where does it go?" — closing the loop between hydrology and infrastructure design.
HydraLink 1.0 is available now. Learn more and get started.