Zombies Vampires
1/19/2016
Monitoring and Modeling a Reservoir Flush: Simulating Sustainable Reservoir Management at Spencer Dam with an HEC‐RAS Unsteady Sediment Model and New Sediment Operational Rules
Stanford Gibson, PhD (HEC) Paul Boyd, PhD, PE (NWO)
Thursday January 7, 2015: Noon (PST)
Google n‐gram
Measures the relative occurrence of words in books over the last 200 years.
80 years
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1/19/2016
Tuttle Reservoir, Kansas
Lewis and Clark, Missouri River
Routing
Flushing
NWO – With Paul Boyd PhD.
NWK – With John Shelley PhD.
New Sediment Features in HEC‐RAS 5.0 Unsteady Sediment Transport and Reservoir Sediment Management Features
Quasi‐Unsteady Unsteady Sediment
Funded by the Corps of Engineers Flood and Coastal Storm Damage Reduction R&D Program
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1/19/2016
Lewis and Clark Tuttle Creek Sediment Flushing Model Routing Model
Gibson, S. and Boyd, P. (2014) “Modeling Long Term Alternatives for Sustainable Sediment Management Using Operational Sediment Transport Rules,” Reservoir Sedimentation –Scheiss et al. (eds), 229‐236.
Shelley, J., Gibson, S., and Williams, A. (2015) “Unsteady Flow and Sediment Modeling in a Large Reservoir using HEC‐RAS 5.0,” Federal Interagency Sediment Conference, SedHyd Proceedings.
“Often the available field data are not sufficient to permit a formal calibration, but computational modeling is still the best method for analyzing the problem… The resulting studies are called computational analysis studies.”
‐Thomas and Chang ASCE Manual of Practice 110
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Funded by the Regional Sediment Management R&D Program (RSM)
Spencer Dam Flushing Model
Spencer Dam on the Niobrara River
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1/19/2016
The November 2015 Flush
t~5hrs
vid
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Reservoir Stratigraphy
Coarse Sand and Gravel Cross Bedding Clay Seams
Mud Flats
Organic Flood Debris Layers
Missouri
Niobrara
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1/19/2016
Qualitative Observations: Novel Bed Forms
Clay Rollers
“Topographic” Bed Forms
Periodic Antidunes ‐ 90 s cycle
HEC‐RAS Model and Calibration
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1/19/2016
Survey and HEC‐geoRAS Model
Spencer HEC‐RAS Model
400 600 800 1000 1200 1400 1600
1485
1490
1495
1500
1505
1510
Station (ft)
Ele
vatio
n (
ft)
3 2
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Pre‐Flush Sediment Samples
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Sampling Bridge
1/19/2016
Post‐Flush Core Samples
USGS Concentration Measurements
Dam
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Downstream Concentration Calibration
Cumulative Volume Change (4 week run)
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1/19/2016
Spencer HEC‐RAS Model
Lateral Processes Observed
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1/19/2016
http://www.eng.buffalo.edu/glp/events/summer2008/week1/full/8‐GoodwinCreekDesign.pdf
USDA‐ARS Bank Failure and Toe Scour Model (BSTEM) in HEC‐RAS
Goodwin Creek Validation
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1/19/2016
Deposition Model: Measured and Computed Bed Change Between Fall and Spring Flushes
HEC‐RAS Modeling Alternatives: Concentration Controlled Flushing
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1/19/2016
Downstream Concentration Threshold
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1/19/2016
HEC‐RAS Concentration Threshold Model
HEC‐RAS Modeling Alternatives: Routing Qsed‐in=Qsed‐out
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1/19/2016
International Sustainable Reservoir Management Initiatives
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Lower Mekong Basin
Kondolf, G.M., Rubin, Z.K, and Minear, J.T., (2014) “Dams on the Mekong: Cumulative sediment starvationWater Resources Research” Volume 50, Issue 6, pages 5158‐5169, 27 JUN 2014 DOI: 10.1002/2013WR014651
Laos Reservoir Sediment Workshops
Pictures From Paul Boyd (NWO)
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Laos Reservoir Sediment Workshops
Nam Ou 2 Model
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1/19/2016
Nam Ou 2 Model
Nam Ou 2 Model
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‐ ‐
‐ ‐
1/19/2016
Ongoing HEC‐RAS Sediment Activities Select Projects: ‐Islamabad Class and Tarbela Model
‐with Bill Doan and Mamie Brouwer ‐ USACE/USAID ‐Lower Missouri Sediment Model (500 miles)
with John Shelley NWK ‐Lower Mississippi Unsteady Sediment Model (DS of Old River)
with ERDC CHL: Ronnie Heath, Travis Dahl, Jim Lewis, Chris Nygaard
‐Muskegon River Coupled Ice‐Sediment Model ‐For Detroit District ‐ LRE
‐Falls Creek Sediment Flushing Model ‐with Chris Nygaard – NWP – For RSM
Features: 2D Sediment – With Alex Sanchez 1D Unsteady Finite Volume Method – RMA and RAS Team
Partners Funding Partners: Regional Sediment Management R&D Program (RSM) Flood and Coastal Storm Damage Reduction R&D Program Omaha District USGS
HEC‐RAS Team: Gary Brunner, Mark Jensen, Steve Piper, Cam Ackerman, Alex Kennedy
District Partners: Paul Boyd, PhD, PE – NWO John Shelley, PhD – NWK
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Niobrara River
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