Carlson Hydrology 2027

Carlson Hydrology 2027  – Comprehensive Stormwater & Drainage Design Software

Carlson Hydrology is a leading civil engineering hydrology software designed for engineers, surveyors, and land development professionals. This stormwater modeling software streamlines drainage system design, watershed analysis, and runoff calculations, helping you create efficient, compliant projects

With its intuitive interface and full integration with other Carlson Civil Suite programs, Carlson Hydrology enables accurate hydrology modeling, professional reporting, and automated stormwater management calculations

Product Highlights

• Stormwater Management & Drainage Design – Efficiently design retention ponds, detention systems, culverts, and channels

• Watershed & Runoff Analysis – Calculate peak flows, hydrographs, and runoff volumes with precision

• Regulatory Compliance Tools – Ensure all designs meet local, state, and federal stormwater requirements

• Seamless Carlson Civil Suite Integration – Work smoothly with Carlson Civil, Survey, and GIS software

• Automated Reporting – Generate detailed hydrology reports and submittal-ready documentation

Industry wide adoption

Trusted by municipalities, civil engineers, and land developers, Carlson Hydrology provides a complete hydrology modeling solution for projects of all sizes. From small residential developments to large-scale infrastructure, this civil engineering software for stormwater analysis delivers accuracy, efficiency, and reliability

Upgrade your workflow with Carlson Hydrology — the ultimate watershed analysis and drainage design tool for modern civil engineering

Carlson Hydrology can be purchased as a standalone module or as part of the Civil Suite, which includes Survey, Civil, and GIS. The module can run standalone with the included license of IntelliCAD or on top of a separately purchased license of full AutoCAD

Important: The software module is a new, end user perpetual license. If you are a current Carlson Software user, please contact us to discuss renewal or cross-grade options

From Carlson Software, you get complex calculations of surface flows integrated with the DTMs

• Tap extensive libraries on rainfall, inlets, manholes, outlets
• Calculate inlet intercepted and bypass flows, gutter spread and depth, pipe flow depth and velocity, and hydraulic and energy grade lines
• Get warnings for collisions, excessive pipe lengths, insufficient cover, lack of slope, excessive flow rates, and more
• Track runoff and analyze watershed – choose entire area or the watershed above a point such as a catch basin
• Design ponds, culverts, channels, and outlets
• Draft sewer pipe dynamically in plans, profiles, and 3D

• Sewer Line Logic: Implemented "Trunk" vs. "Tributary" line; Added the ability to define separate starting stations for Trunk and Tributary lines; Added a command to reset the Trunk Line while keep the rest as the Tributary lines; Added a command to reset the line name; Added plan view control on selected lines; Removed line name support for trench and F2F sewer plan views where not applicable
• Annotation Styles: Implemented automatic naming of sewer structures based on Line name and index; Introduced a new junction annotation style that includes trunk and tributary line names and stations in the junction labels for both plan and profile; Added a setting to increment manhole stations by rounded pipe lengths
• Interactive Analysis: Added active rainfall ID and return period tracking in the spreadsheet editor, allowing for real-time HGL updates in OpenGL view; Added Catchment Area (CA) and Accumulated CA to the editor; Added file modification dates to the Sewer Inspector; Added detection and warning messages when pond sizing inputs fall outside recommended sizing ranges; Improved sewer data handling during LandXML import and export; Added detection for duplicate line names to the Add Tributary Line routine
• F2F Pipe Warning: Added a warning to FLD2FIN Pipe Processing to prevent accidental parameter overrides by append description special codes
• Sewer Profile Inspector: Added profile/sewer link type and improved slope accuracy by using original pipe slope settings
• Draw Sewer Profile: Link Profile: Improved "Off, Draw Only" option and dictionary saving; Preview: Updated profile preview to show actual pipe material labels; Manhole Labels: Added horizontal offset options; Station Style: Refined horizontal label box logic based on grid selection
• Detention Pond Design: Stored Culvert tailwater condition data and culvert design control type in the pond file; Increased the decimal precision for the C factor and CN values
• Importing sewer networks from 3D polylines automatically sets trunk outfalls and improves outfall selection prompts for tributary lines
• Improved dynamic editing of sewer profiles maintaining properties (layer, linetype, color) directly from the sewer profile dictionary
• Improved conversion of Civil 3D pipe networks to Carlson sewer files (.sew) during Civil 3D Pipe Import
• Improved options to export sewer networks to points
• Added support for the hectare area unit in Pond Design and updated runoff C-factor and curve number computations
• Added C-factor adjustment features for higher return period storms in Pond Design & HydroNet and updated calculations and reports