Stormwater Symposium

Oral

398239 - Oak Gulch Green Infrastructure - Scaling and Continuity Analysis from the Lot to the Watershed Level

Tuesday, June 5
2:00 PM - 3:30 PM
Location: Greenway AB
Co-Authors: Brik Zivkovich, Denver, Colorado – Wright Water Engineers, Inc.; Jim Wulliman, Denver, Colorado – Muller Engineering Company, Inc.; Sam Rogers, Denver, Colorado – Muller Engineering Company, Inc.; Barbara Chongtoua, Denver, Colorado – Urban Drainage & Flood Control District

The Oak Gulch green infrastructure (GI) planning and design project was initiated by the Urban Drainage and Flood Control District (UDFCD) in 2016 to provide a holistic assessment of the potential to develop a watershed in the southeastern metropolitan area using the principles of GI and low impact development (LID) through the earliest planning stages to design and through implementation. UDFCD assembled a project team of planners, civil engineers, water engineers, landscape architects, geomorphologists and other specialists to fully evaluate the potential for minimizing changes in hydrology and water quality as a result of development. The project has involved development of multiple site grading plans to evaluate economic viability of development strategies from traditional development to full implementation of LID/GI, identification of barriers to implementation of GI/LID, and analysis of hydrologic changes and stormwater controls from the lot scale to the watershed scale using SWMM on an event and continuous basis. LID and GI practices were developed at lot, block, subcatchment and watershed scales. Key practices included disconnecting impervious area, accounting for infiltration in pervious conveyances, and distributed full spectrum detention.

This presentation will focus on the hydrology and modeling aspects of this project, including discussion of scaling and continuity issues at different temporal and spatial scales from the lot level to the watershed level. The modeling approach used is capable of spanning multiple scales, and the presentation will identify surrogate modeling techniques that allow for accounting of lot and block scale infiltration practices at a larger, subcatchment scale.

Andrew Earles, Ph.D., P.E., D.WRE

Vice President
Wright Water Engineers, Inc

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398239 - Oak Gulch Green Infrastructure - Scaling and Continuity Analysis from the Lot to the Watershed Level



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