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Decision support system for the Connecticut River Basin: Estimating daily unregulated streamflow

Decision support system for the Connecticut River Basin: Estimating daily unregulated streamflow. In cooperation with:. Connecticut River Flow Modeling Workshop Department of Civil and Environmental Engineering University of Massachusetts Amherst August 5, 2010.

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Decision support system for the Connecticut River Basin: Estimating daily unregulated streamflow

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  1. Decision support system for the Connecticut River Basin:Estimating daily unregulated streamflow In cooperation with: Connecticut River Flow Modeling Workshop Department of Civil and Environmental Engineering University of Massachusetts Amherst August 5, 2010 The Connecticut River looking north in the early evening, from the French King Bridge at the Erving-Gill town line in Western Massachusetts. Source: http://en.wikipedia.org/wiki/Image:IMG_3758_view_north_from_French_King_Bridge.jpg

  2. Project background and objectives

  3. Method to estimate streamflow at ungaged sites Estimate basin characteristics Estimate flow-duration curve by solving the regression equations Estimate hydrograph ln(Q50) = a1 + b1 * (ln(Area)) STREAMFLOW STREAMFLOW TIME EXCEEDENCE PROBABILITY Area = XX.X mi2 Transform the estimated flow-duration curve into a time series of streamflow by use of a reference streamgage (Fennessey [1994], Smakhtin [1999], Smakhtin et al. [1997], and Mohamoud [2008]) Solve regression equations that relate measurable basin characteristics to flow-duration-curve statistics Sources: Archfield and others [2010]; Archfield and Vogel [2010; in press]

  4. Daily streamflow validation - Summary N = 31 More weight to fit at highest streamflow values BEST Equal weight to high and low streamflow values WORST (LOG) WORST (LINEAR)

  5. Daily streamflow validation – Best fit 01154000, Saxtons River at Saxtons River, VT NS E = 0.92 NS Elog = 0.87 ESTIMATED STREAMFLOW, IN CFS OBSERVED STREAMFLOW, IN CFS

  6. Daily streamflow validation – Worst fit (log) 01109000, Wading River near Norton, MA NS E = 0.66 NS Elog = 0.69 ESTIMATED STREAMFLOW, IN CFS OBSERVED STREAMFLOW, IN CFS

  7. Daily streamflow validation – Worst fit (linear) 01200000, Tenmile River near Gaylordsville, CT NS E = 0.69 NS E = 0.39 NS Elog = 0.72 ESTIMATED STREAMFLOW, IN CFS OBSERVED STREAMFLOW, IN CFS

  8. Connecticut River Streamflow Tool Adding a link: Regional Applications

  9. Connecticut River Streamflow Tool

  10. Connecticut River Streamflow Tool

  11. Remaining tasks • Complete development and testing of the seamless, multi-state, point-and-click tool for the Connecticut River Basin • Publish results and tool by March 2011; Draft report and tool to be completed by October 2010 Source of state maps: http://www.geology.com; Source of CT Basin map: http://nh.water.usgs.gov/projects/summaries/ct_atlas.htm

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