The STREAM-1D Experience
STREAM-1D brings real-time, interactive tools directly into your browser, simplifying your design, review, and collaboration workflows.
Zero-Install Portability
Runs natively in any modern web browser. Launch, model, and review profiles from any PC, Mac, Linux machine, or iPad.
Instant Hydraulic Feedback
Move flow sliders or modify span sizes and watch WSEL and EGL profiles adjust dynamically with zero compute delay.
Docked Multi-View Interface
Keep plan, profile, and cross-section views perfectly docked together. Click in one window, and see details update in all views.
Easy Collaboration
Save models securely in the cloud, import existing projects, and share interactive model links instantly with clients or teammates.
Live "What-If" Hydraulic Analysis
Ditch static runs. STREAM-1D solves the standard step equations on a background thread in real-time. Adjust river flow rates with a slider or modify channel geometry, and watch the water surface elevation (WSEL) and energy grade line (EGL) respond instantly.
- Instantly locate hydraulic jumps as flow parameters change
- Smooth sliders let you test a full range of discharge rates in seconds
Unified, Docked Workspace
Keep all views in front of you. Plan, profile, active cross-section, structures, and tables are locked into a unified multi-pane dashboard. Selecting a cross-section in one window highlights it and brings it to focus in the others automatically.
- Avoids floating window management and lost dialogs
- Direct, visual selection of sections in the plan view maps instantly to details
Import HEC-RAS Geometry Files
Leverage your existing modeling datasets. Instead of manually retyping cross-section coordinates and stationing, you can upload standard HEC-RAS geometry data (`.g01`, etc.) directly. STREAM-1D parses the geometries instantly.
- Smoothly parses variable station points and Manning's roughness assignments
- Set up model scenarios in the browser in less than a minute
HEC-RAS Calibrated Accuracy
The solver accounts for composite Manning's roughness, ineffective flow areas, Coriolis distribution coefficients (α ≈ 1.3) at constricted limits, and balances multi-flow bridge regimes (orifice + weir overtopping) — matching standard step water surface results.
- Includes inlet/outlet control equations for box, circular, and arch culverts
- Exposes area, conveyance, and top-width intermediate results for audit
Beta Access & Constraints
STREAM-1D is in public beta. All registered users are granted full engine solver access.
Free Account Limits
- Build up to 2 active projects
- Unlimited cross-sections and slices per project
- Full composite roughness & sediment blockage support
- Inline structures: culverts & bridge pier routines
Ready to experience real-time web river hydraulics?
Start Modeling