Abstract: Session B  9:50 am (Back to Session B)
Modeling 3D Rivers in AutoCAD to Enhance Design and Deliverables

Daniel Ketzer, P.E.
Princeton Hydro
Ringoes, NJ

Authors: Daniel Ketzer, Eric Daley, and Cory Speroff

In river restoration, the proposed geometry of the river channel is the key part of the design. It impacts earthwork, utility conflicts, plan set layout, and many other aspects of the project. In larger projects with reaches measuring thousands of feet and greater, manual grading is extremely time consuming and tedious; and determining the entire implication of the proposed design is difficult to achieve when simply analyzing proposed cross-sections and profiles.  To increase efficiency and maintain uniformity throughout the subject reach developing a 3D-surface model of the proposed restoration will reduce design time and increase quality. AutoCAD Civil 3D can be used to convert the proposed profiles and cross-sections from a geomorphic design into a 3D surface of the river corridor. Once the general geometries are developed tie-in grading, customizing finite reaches, and cut/fill quantities can quickly be developed, which creates more accurate cost estimates and limits of disturbance. The 3D model can be compared to modeled utility networks to easily and accurately check for utility crossing conflicts as well as exported to hydraulic modeling software to quickly create a proposed conditions model. This presentation provides an overview on how to create 3D river model based on geomorphic input to enhance the overall accuracy and quality of a project.