1/19/2016 Monitoring and Modeling a Reservoir Flush: Simulating - PDF document

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. Zombies Vampires 80 years 1

1/19/2016 Lewis and Clark, Missouri River Flushing NWO – With Paul Boyd PhD. Tuttle Reservoir, Kansas Routing 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 2

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 Shelley, J., Gibson, S., and Williams, A. (2015) “Unsteady Flow and Sediment Sediment Management Using Operational Sediment Transport Rules,” Modeling in a Large Reservoir using HEC ‐ RAS 5.0,” Federal Interagency Reservoir Sedimentation – Scheiss et al. (eds), 229 ‐ 236. 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 3

1/19/2016 Spencer Dam Flushing Model Funded by the Regional Sediment Management R&D Program (RSM) Spencer Dam on the Niobrara River 4

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1/19/2016 The November 2015 Flush t~5hrs vid 7

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1/19/2016 Reservoir Stratigraphy Coarse Sand and Gravel Cross Bedding Clay Seams Organic Flood Debris Layers Mud Flats Missouri Niobrara 10

1/19/2016 Qualitative Observations: Novel Bed Forms “Topographic” Bed Forms Clay Rollers Periodic Antidunes ‐ 90 s cycle HEC ‐ RAS Model and Calibration 11

1/19/2016 Survey and HEC ‐ geoRAS Model Spencer HEC ‐ RAS Model 3 2 1510 1505 Elevation (ft) 1500 1495 1490 1485 400 600 800 1000 1200 1400 1600 Station (ft) 12

1/19/2016 Pre ‐ Flush Sediment Samples 13

1/19/2016 Post ‐ Flush Core Samples Dam USGS Concentration Measurements Sampling Bridge 14

1/19/2016 Downstream Concentration Calibration Cumulative Volume Change (4 week run) 15

1/19/2016 Spencer HEC ‐ RAS Model Lateral Processes Observed 16

1/19/2016 USDA ‐ ARS Bank Failure and Toe Scour Model (BSTEM) in HEC ‐ RAS http://www.eng.buffalo.edu/glp/events/summer2008/week1/full/8 ‐ GoodwinCreekDesign.pdf Goodwin Creek Validation 17

1/19/2016 Deposition Model: Measured and Computed Bed Change Between Fall and Spring Flushes HEC ‐ RAS Modeling Alternatives: Concentration Controlled Flushing 18

1/19/2016 Downstream Concentration Threshold 19

1/19/2016 HEC ‐ RAS Concentration Threshold Model HEC ‐ RAS Modeling Alternatives: Routing Q sed ‐ in =Q sed ‐ out 20

1/19/2016 International Sustainable Reservoir Management Initiatives 21

1/19/2016 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) 22

1/19/2016 Laos Reservoir Sediment Workshops Nam Ou 2 Model 23

1/19/2016 Nam Ou 2 Model Nam Ou 2 Model 24

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 25

1/19/2016 Niobrara River 26