Hydrologic Study of Thundering Brook, Killington, Vermont

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Hydrologic Study of Thundering Brook, Killington,
Vermont

• By Kathleen Donna and Sarah King

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Outline

• Introduction
• Location Map
• Data Reduction

• Discussion
• Conclusion
• References

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Introduction

• The purpose of this study is to determine the
  height of the 200 year flood at the Thundering
  Brook and Ottaquechee River Drainage basin
• Section of Appalacian Trail must be moved
• Flow records of Vermont Streams, graphed and
  analyzed, probability analysis
• Manning Equation used to determine the depth of
  the flood water
• Depth of flood water used to determine height of
  boardwalk

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Location Map
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Data Reduction

• Flow data collected from 27 gaged Vermont
  streams

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Data Reduction

• Calculated recurrence interval and probability

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Data Reduction

• Plotted discharge vs. probability, estimations

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Data Reduction

• Plotted discharge/area relation graphs,
  estimations

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Data Reduction

• Manning Equation Calculations

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Data Reduction

• Manning Coefficient Sensitivity Test (Dunne and
  Leopold)

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Discussion

• Sensitivity Test
• Boardwalk design flood depth

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Conclusion

• Storage area capacity
• The analysis of a range of floods and their
  estimated probabilities is an acceptable
  flood-prediction method (NRC)

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References

• USGS (2002) http//water.usgs.gov/vt/nwis/peak?
• National Research Council (1988) Estimating
  Probabilities of
• Extreme Floods, National Academy Press,
  Washington, DC
• Dunne, Thomas and Leopold, Luna B. (1998) Water
  in
• Environmental Planning, W. H. Freeman and
  Company, New York.