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The Sanderson Project

Finding the S vs. Q relationship By: Cody Hudson . The Sanderson Project. SITES Background . Water Resources “Site” Analysis Program Developed for NRCS Performs hydrologic and hydraulic analyses of water control structures Calculates spillway stability. Single Event Analysis .

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The Sanderson Project

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  1. Finding the S vs. Q relationship By: Cody Hudson The Sanderson Project

  2. SITES Background • Water Resources “Site” Analysis Program • Developed for NRCS • Performs hydrologic and hydraulic analyses of water control structures • Calculates spillway stability

  3. Single Event Analysis • Used to simulate design storm through existing structures • Calculates • Inflow Hydrograph • Outflow Hydrograph • Spillway Stability • Storage/Outflow

  4. Hydrology (Inflow) • Enter Rainfall or Hydrograph • Calculate SCS Hydrograph based on • Basin characteristics • Rainfall amount • Rainfall distribution

  5. Elevation-Storage dE(S) • E(S)=Elevation function of storage

  6. Hydraulics(Outflow) W • Principal Spillway • Orifice flow • Weir flow D L

  7. Hydraulics(Outflow) • Auxiliary Spillway • Open Channel Flow • Width • Side Slope • Channel Slope • Length • Manning’s n

  8. Watershed Schematic Structure Reach Junction Uncontrolled Subwatershed

  9. Sites Model • CN=60 • 6hr 100 year rainfall = 5.11 in • Peak Flow = 10,323 cfs @ 8.6 hr

  10. Sites Model • CN=74 • 6hr 100 year rainfall = 5.11 in • Peak Flow = 18590 cfs @ 6.5 hr

  11. Site 11

  12. Questions

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