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Monday, October 17 • 4:15pm - 6:15pm
P06. (Poster Display) Building Hydraulic Models in GIS to Quantify Floodplain Storage

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AUTHORS: Abigail Ericson, University of Massachusetts Amherst; Dr. Richard Palmer, University of Massachusetts Amherst

ABSTRACT: Throughout history, people have settled near rivers and in floodplains, placing communities at risk to flooding, as demonstrated recently by the detrimental impact of Tropical Storm Irene. An active area of research in water resources planning and management involves understanding and quantifying the benefits and costs of high flows in rivers. This study explores the potential of flood attenuation by enhancing floodplain storage in portions of the Connecticut River. The study looks at quantifying the benefits of floodplain storage through the use of a simpler Hec-ResSim model and a sophisticated Hec-RAS model. The Hec-RAS model, built in ArcGIS using Hec-GeoRAS, incorporates detailed LiDAR and orthogonal imagery, USACE collected bathymetry, and measurements taken in the field. The analyses confirm that increased floodplain capacity attenuates high flows, and the Hec-RAS model has the added benefit of being able to incorporate projections to alternative flows based on floodplain and land cover changes. The Hec-RAS model allows comparison of its more detailed result to that from Hec-ResSim, to determine if the simpler model is sufficient to estimate changes in flows. Both models are powerful tools that can quantify floodplain benefits and provide justification for floodplain conservation and restoration for city planners and conservation groups.

Monday October 17, 2016 4:15pm - 6:15pm EDT
Ocean View Room

Attendees (1)