Civil Engineering
Technical Instruction
An alternative to get runoff coefficients automatically
Class ID: CES501210
Product(s): AutoCAD, Civil 3D, Dynamo Studio
Topics: Building Information Modeling (BIM), Infrastructure Workflows, Water Resource Management

Session Description

BIM is about creating and managing as many automatic tasks as possible throughtout a whole conected design process. In the specific case of drainage projects in Civil 3D, calculation and definition of catchments' runoff coefficients are two manual processes that create a disruption node in the automatic workflow. Designers normally need to estimate each catchment value by visual intuition from AutoCAD drawings or to draw polygons for each surface type inside the catchment.
And what if there was a way to get runoff coefficients faster?
In this technical instruction, you will have the opportunity to learn how to calculate runoff coefficients automatically from AutoCAD drawings using Civil 3D and Dynamo.

Learning Objectives

  1. Define an automation workflow in a drainage project
  2. Identify catchments polygons on a surface
  3. Create and apply an automation script in Dynamo
  4. Get all catchmnents' runoff coefficients on a surface

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