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3-D Stream Restoration Design, Monitoring and Beyond David Bidelspach, PE - Stantec Consulting Greg Jennings, PE – NCSU BAE Dan Clinton, PE – Town of Cary Barbara Doll, PE – NC Sea Grant
We are living in a 3-D World • DESIGN • MODELING • RE-DESIGN – Design Iterations • CONSTRUCTION • MONITORING • BEYOND – What is next
What is a 3-D Design • Eagle Point • Surv-CAD • Geo-Pak • Land Desktop • Autodesk Civil Series • RiverMorph? • HEC-RAS? - Manage Points - Define Alignments - Create Points from Alignments - Build Surfaces
What is a 3-D Design • Eagle Point • Surv-CAD • Geo-Pak • Land Desktop • Autodesk Civil Series • RiverMorph ? • HEC-RAS ?
Benefits - of 3-D Design • Hydraulic Modeling is Not Limited • Easier to Create Design Revisions and Iterations • Better Estimate of Quantities • Optimization of Project Reaches • Constructability • Assist in Construction Stakeout • GPS Guided Construction Equipment • Good Check for On-site Stupidity During Construction
3-D Design - Modeling Summary • Engineering to Check and Design • Sediment, Backwater, Velocity, & Shear Stress • HEC-RAS Limitations • 1-D only • cannot model actual flow around bends, in constrictions, or other 2-D, 3-D flows • cannot model channel-floodplain interactions
3-D Construction • Limited construction oversight • As-built conditions surveyed during construction • Efficient digging
3-D MonitoringData Analysis • Shows current condition of the project • Compares current condition to previous years • Shows how stream is functioning • Shows trends and direction
3D - Monitoring • Photo Documentation • Profile Analysis - 3D Surveys • Cross-sectional Analysis - 3D Surveys • Planform Analysis - CAD