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Investigate Reservoir Sediment and Watershed Erosion Using GIS

Investigate Reservoir Sediment and Watershed Erosion Using GIS. Tiao J. Chang and Travis D. Bayes Department of Civil Engineering Ohio University, Athens, Ohio, USA

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Investigate Reservoir Sediment and Watershed Erosion Using GIS

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  1. Investigate Reservoir Sedimentand Watershed Erosion Using GIS Tiao J. Chang and Travis D. Bayes Department of Civil EngineeringOhio University, Athens, Ohio, USA Scott McKeeverMuskingum Watershed Conservancy DistrictNew Philadelphia, Ohio, USAPrepared for the Sixth Scientific AssemblyInternational Association of Hydrological SciencesMaastricht, The NetherlandsJuly 18-27, 2001

  2. Charles Mill Lake Black Fork of the Mohican River • Original Volume* = 11,369 acre-ft • Current Volume* = 8,129 acre-ft • Sediment Volume* = 3,139 acre-ft • 28% Loss of Volume • Used by MWCD for Public Recreation • Need for Dredging U.S. 30 Rt 430 Rt 603 Charles Mill Lake *Note: Data is as of 1993

  3. Dredging of Charles Mill Lake

  4. How It Works

  5. Dredging of Charles Mill Lake

  6. Dredging Outlet

  7. Screen for Wetland Formation

  8. Wetland Formation

  9. Wetland View 1 As a Wetland!

  10. Wetland View 2

  11. Bed Elevation: 1934

  12. Bed Elevation: 1988

  13. Sediment Depth: 1934-1998

  14. Collecting Samples • Used GPS and USGS Maps for back-up • 60 sediment sample sites were selected 1. Retrieving the Samples (4 days) 2. Bagging the Samples for Transport

  15. Recording Attributes - Recorded UTM coordinates, sample #, general grain size and color with Munsell Chart - Ground sediment and sieve analysis (8 weeks)

  16. Images of Deposits

  17. D90 Image

  18. D10 Image

  19. Uniformity Image • Gravelly if Cu>4

  20. Gradation Image

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