the sanderson project
Post on 25-Feb-2016
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THE SANDERSON PROJECTFinding the S vs. Q relationshipBy: Cody Hudson
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 Used to simulate
design storm through existing structures
Calculates Inflow HydrographOutflow HydrographSpillway StabilityStorage/Outflow
Hydrology (Inflow)
Enter Rainfall or Hydrograph
Calculate SCS Hydrograph based on Basin characteristicsRainfall amountRainfall distribution
Elevation-Storage
E(S)=Elevation function of storage
dE(S)
Hydraulics(Outflow) Principal Spillway
Orifice flowWeir flow
L
WD
Hydraulics(Outflow) Auxiliary Spillway
Open Channel FlowWidthSide SlopeChannel SlopeLengthManning’s n
2/13/2 SARnkQ
Watershed Schematic
Structure
Reach
UncontrolledSubwatershed
Junction
Sites ModeloCN=60o6hr 100 year rainfall = 5.11 inoPeak Flow = 10,323 cfs @ 8.6 hr
Sites ModeloCN=74o6hr 100 year rainfall = 5.11 inoPeak Flow = 18590 cfs @ 6.5 hr
Site 11
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