Carlson Hydrology is a comprehensive yet easy-to-use hydrologic and hydraulic solution designed for engineers and designers. It integrates directly into your CAD environment, using polylines, text, and layers to simplify workflow.
With Carlson Hydrology, full 3D road and lot designs feed directly into flow calculations and drainage systems. The software automates runoff analysis, storm drain system design, pond sizing, culvert and channel layouts, and inlet management, reducing time and increasing accuracy.
Extensive libraries for rainfall, manholes, outlets, and inlets support precise hydraulic calculations. The software provides warnings for potential issues such as collisions, insufficient cover, slope errors, or excessive flow rates. It also links with HydroCAD for interactive watershed modeling, enabling engineers to perform system-wide stormwater analyses efficiently.
Comprehensive Site Drainage
• Site drainage using Rational or SCS method.
• Runoff analysis including watershed area, time of concentration, and peak flows.
• Automatic extraction of subcatchment sub-area data.
Stormwater & Hydraulic Design
• Storm drain system design and drafting.
• Pond, culvert, channel, and outlet sizing.
• Precise gutter flow, spread, and bypass calculations.
3D Integration & Automation
• 3D road and lot designs feed directly into hydrologic calculations.
• Dynamic drafting in plans, profiles, and 3D.
• Automatic warnings for collisions, insufficient slope, or excessive pipe lengths.
Advanced Analysis & Reporting
• Track runoff and analyze watersheds from any point.
• Generate hydrographs, pre- and post-construction analysis.
• HydroNET Explorer for subcatchment, pond, and link processing with PDF reports.
Integration & Libraries
• Link with HydroCAD for interactive watershed modeling.
• Extensive rainfall, inlets, manholes, and outlet libraries.
• Spreadsheet Sewer Editor for sanitary and utility network design.
Efficiency & Accuracy
• Layer-based runoff calculations with DTM-derived flow paths.
• Automatic calculation of maximum runoff lengths and energy grade lines.
• System-wide 3D stormwater solutions for complete project visualization and design.
Carlson Hydrology 2026 – New Features & Improvements
SewerNET
- Added option to Erase Network to support SewerNET files
- Added symbol previews for lateral settings
- Improved labeling options in Plan View for laterals
- Added option to decrement manhole names
- Option to directly enter invert values in SewerNET dialog box
- Improved labeling options for sewer laterals
- Added lateral cleanout station/offset in lateral design; updated computations and dialog display
- Improved lateral creation workflow
- Added attribute block option for lateral labels at cleanout locations
- Added cleanout station, offset, and depth to Sewer Lateral report
- Improved text labeling options for lateral annotations
- Enhanced Rainfall data checks
- Improved options for drawing and labeling Sewer Profiles
Structure
- Added horizontal orifice design
- Multiple drop pipe design updates
- Updated Pond design and HydroNet integration
Watershed
- Modified HydroNet to skip surface file prompt when using 3D flow line slope
- Tailwater editable on Sewer Dock dialog for Rational method
- Updated profile creation from pipe polyline crossings to store pipe material and thickness
- Added ability to reduce polyline vertices for large watershed areas
Carlson Software is more than just a purchase—it’s a partnership.
With dedicated Regional Managers across the country, free lifetime technical support, and flexible training options to fit any budget, we’re here to support you every step of the way.
Direct Technical Support
• Hours: Monday – Friday, 9 AM – 5 PM
• Email: tim@carlsongs.com
• Telephone: +1 (716) 799-4187
