Difference between revisions of "GCDAMP- HFE 2016"

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== SUMMARY ==
 
  
 
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*Sediment in the system: '''962,000 metric tons'''
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== 2016 High Flow Experiment Snapshot ==
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*Peak CFS: '''35,100 cfs'''  
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*The 2016 HFE represents the '''4th''' controlled high flow release conducted under the [http://gcdamp.com/index.php?title=The_HFE_Page HFE Protocol].
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*Powerplant capacity = '''20,100 cfs'''  
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*A preliminary analysis of these images indicates that sandbar size increased at 55% of sites, remained unchanged and 30% of sites, and decreased at 15% of sites, a response similar to those observed during each of the 2012-2014 HFEs.
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*Units available: '''6'''  
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*Before and after images from the November 2016 HFE from each of the 45 sandbar sites monitored with remotely deployed digital cameras are available [https://grandcanyon.usgs.gov/gisapps/sandbartour2016/index.html? '''here'''].
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*Bypass tube capacity = '''15,000 cfs'''  
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==Sediment Conditions==
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'''Fall Accounting Period''' [[File:2016 FallHFE Paria.png|thumb|right|400px|[http://www.gcmrc.gov/discharge_qw_sediment/station/GCDAMP/09382000#/ '''Paria River gage at Lees Ferry'''] ]]
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*Paria input (Jul 1 - Nov 6): 844,748
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*Accumulated in Upper Marble Canyon (Jul 1 - Nov 6, lower bound) = 373,000
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*Accumulated in Lower Marble Canyon (Jul 1 - Nov 6, lower bound) = 72,000
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*Available for HFE: 373,000 + 72,000 = 445,000
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'''HFE Transport''' [[File:2016 FallHFE UpperMarbleCanyon.png|thumb|right|400px|[http://www.gcmrc.gov/discharge_qw_sediment/reach/GCDAMP/09380000/09383050 '''Upper Marble Canyon'''] ]]
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*Paria input (Nov 7 - 12): 1,000
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*Evacuated from Upper Marble Canyon (Nov 7 - 12, lower bound) = -492,000
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*Evacuated from Lower Marble Canyon (Nov 7 - 12, lower bound) = -184,000
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*Left over in Marble Canyon after HFE (Nov 7 - 12): 445,000 + 1,000 - 492,000 - 184,000 = -230,000
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'''Spring Accounting Period''' [[File:2016 FallHFE LowerMarbleCanyon.png|thumb|right|400px|[http://www.gcmrc.gov/discharge_qw_sediment/reach/GCDAMP/09383050/09383100 '''Lower Marble Canyon'''] ]]
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*Paria input (Dec 1 to Apr 1): 160,000
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*Evacuated from Upper Marble Canyon (Dec 1 to Apr 1, lower bound) = -241,000
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*Evacuated from Lower Marble Canyon (Dec 1 to Apr 1, lower bound) = -81,000
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*Available for spring HFE: -241,000 - 81,000 = -322,000 
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==HFE Details==
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'''Schedule & Duration'''
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*Nov. 7 - 6 a.m. begin upramp to powerplant capacity ( ~21,000 cfs)
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*Nov. 7 - 10:00 a.m. open bypass tubes, reach full bypass at 12:00 p.m.
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*Nov. 11 - 12:00 p.m. end of bypass
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*Nov. 12 - 3:00 a.m. end of HFE
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*Total duration: 5 days & 5 hours ('''96 hours''' at peak release)
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'''Ramp Rates'''
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*Ramp up: 4,000 cfs/hr from 6,500 - 21,000 cfs, then 3,750 cfs/hr to peak (36,000 cfs)
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*Ramp down: 1,875 cfs/hr from 36,000 - 21,000 cfs, then 1,500 cfs/hr to 9,000 cfs
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'''HFE Release Details'''
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*Maximum total release: '''36,000 cfs'''
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*Powerplant capacity: 21,000 cfs
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*River outlet tubes: 15,000 cfs
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*Hydropower generation units available: 6
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*River outlet tubes: 4
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'''Releases and Lake Elevation'''
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*Releases will range from 6,500 - 9,000 cfs prior to and after the HFE
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*Lake elevation is projected to decrease by approximately 2.5 feet during the 5-day period
 
*Estimated acre feet of water bypassed during HFE:  '''125 kaf'''
 
*Estimated acre feet of water bypassed during HFE:  '''125 kaf'''
 
*November volume = '''745 kaf'''
 
*November volume = '''745 kaf'''
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*Hourly Releases before and after HFE:  fluctuate between '''6,000 to 9,000 cfs'''
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'''Costs'''
 
*Estimated costs to hydropower:  '''$1.4 million'''
 
*Estimated costs to hydropower:  '''$1.4 million'''
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*Actual costs to hydropower:  '''TBD'''
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*Actual costs to hydropower:  [https://publications.anl.gov/anlpubs/2019/06/151713.pdf '''1.15 million''']
 
*Direct expenses for removal of concession assets:  '''TBD'''
 
*Direct expenses for removal of concession assets:  '''TBD'''
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*Start Upramp: '''Nov 7, 2016'''
 
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*Finish HFE: '''Nov 11, 2016''' 
 
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*Total HFE duration:  '''96 hrs'''
 
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*HFE 2016 represents the '''4th''' controlled high flow release conducted under the [http://gcdamp.com/index.php?title=The_HFE_Page HFE Protocol].
 
  
 
== SUPPORTING DOCUMENTS ==
 
== SUPPORTING DOCUMENTS ==
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*[https://publications.anl.gov/anlpubs/2019/06/151713.pdf Financial Analysis of Experimental Releases Conducted at Glen Canyon Dam during Water Year 2017]
 
*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16oct18/Attach_07.pdf Fall 2016 HFE Planning]
 
*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16oct18/Attach_07.pdf Fall 2016 HFE Planning]
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*[[Media:HFE TechTeam Rpt 16oct19.pdf|Technical Team Memo: Final Recommendation to Implement a Fall 2016 High Flow Experiment at Glen Canyon Dam]]
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*[[Media:HFE Leadership Memo 16oct26.pdf|Leadership Team Memo: Approval of Recommendation for Experimental High-Flow release from Glen Canyon Dam, November 7-12, 2016]]
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Dear DOI Glen Canyon Leadership Team,
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Please find attached for your consideration the High Flow Experiment (HFE) Technical Team's final conditional recommendation to implement a fall 2016 HFE at Glen Canyon Dam. I am pleased to report the HFE Technical Team's unanimous support of the attached report and recommendation.
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In summary, the HFE Technical Team conditionally recommends that an HFE at Glen Canyon Dam be conducted beginning November 7, 2016 with a peak magnitude of approximately 36,000 cubic feet per second for 96 hours, as explained in the attached report, after 1) by Friday, October 21, GCMRC and NPS personnel confirm ammonia has provided effective treatment for green sunfish in the upper pond in Glen Canyon and 2) DOI commits to prioritizing the development and implementation of non-native species monitoring and mitigation to be in place within the next year.
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The DOI Leadership Team will have a call to consider the recommendation tomorrow October 20, 2016 at 8:00 am mdt. 
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== COMPLIANCE ==
 
== COMPLIANCE ==
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*[http://gcdamp.com/index.php?title=The_HFE_Page HFE Protocol]
  
 
== CONCERNS ==
 
== CONCERNS ==
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*[[Media:Katrina 2016 HFE final 10-13-16.pdf| Angler's concerns regarding a Fall 2016 High flow experiment]]
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*[[Media:20171219 GCPBA HFE comments.pdf| Grand Canyon Private Boater's Association (GCPBA) letter requesting '''slower downramp rates''' following the Fall 2016 High flow experiment.]]
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*[http://gcdamp.com/index.php?title=Green_Sunfish_Page Re-emergence of green sunfish in the -12 Mile Slough]
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*[[Media:Katrina 2016 HFE final 10-13-16.pdf| Angler's concerns regarding a Fall 2016 High flow experiment]] on [http://gcdamp.com/index.php?title=FOOD_BASE '''foodbase'''], [http://gcdamp.com/index.php?title=FISHERY '''trout condition''',] and disbursement of [http://gcdamp.com/index.php?title=Green_Sunfish_Page '''green sunfish'''.] Also, noted that a comprehensive written three year review of the first three HFEs has not been provided yet.
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*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16jan26/documents/Attach_05.pdf Increase in brown trout spawning and the increased prevalence of adult brown trout in the Lees Ferry reach since the beginning of the HFE Protocol]
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*Re-emergence of [http://gcdamp.com/index.php?title=Green_Sunfish_Page '''green sunfish'''] in the -12 Mile Slough.
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*Increase in [http://gcdamp.com/index.php?title=Brown_Trout '''brown trout'''] spawning and the increased prevalence of adult brown trout in the Lees Ferry reach since the beginning of the HFE Protocol.
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== SEDIMENT ==
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== ADDITIONAL ==
 
== ADDITIONAL ==
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*[http://www.usbr.gov/uc/rm/gcdHFE/2016/2016DownstreamFlowArrivalMap.pdf Downstream Flow Arrival Timing Map]
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*[http://www.usbr.gov/uc/rm/gcdHFE/2016/2016ReleasePattern.pdf Glen Canyon Dam Possible HFE Release Pattern]
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<center>
 
<center>

Latest revision as of 15:38, 2 July 2020

High Flow Experiment- 2016
CRC 121119 0038.JPG

2016 High Flow Experiment Snapshot

  • The 2016 HFE represents the 4th controlled high flow release conducted under the HFE Protocol.
  • A preliminary analysis of these images indicates that sandbar size increased at 55% of sites, remained unchanged and 30% of sites, and decreased at 15% of sites, a response similar to those observed during each of the 2012-2014 HFEs.
  • Before and after images from the November 2016 HFE from each of the 45 sandbar sites monitored with remotely deployed digital cameras are available here.

Sediment Conditions

Fall Accounting Period
Paria River gage at Lees Ferry
  • Paria input (Jul 1 - Nov 6): 844,748
  • Accumulated in Upper Marble Canyon (Jul 1 - Nov 6, lower bound) = 373,000
  • Accumulated in Lower Marble Canyon (Jul 1 - Nov 6, lower bound) = 72,000
  • Available for HFE: 373,000 + 72,000 = 445,000
HFE Transport
Upper Marble Canyon
  • Paria input (Nov 7 - 12): 1,000
  • Evacuated from Upper Marble Canyon (Nov 7 - 12, lower bound) = -492,000
  • Evacuated from Lower Marble Canyon (Nov 7 - 12, lower bound) = -184,000
  • Left over in Marble Canyon after HFE (Nov 7 - 12): 445,000 + 1,000 - 492,000 - 184,000 = -230,000
Spring Accounting Period
Lower Marble Canyon
  • Paria input (Dec 1 to Apr 1): 160,000
  • Evacuated from Upper Marble Canyon (Dec 1 to Apr 1, lower bound) = -241,000
  • Evacuated from Lower Marble Canyon (Dec 1 to Apr 1, lower bound) = -81,000
  • Available for spring HFE: -241,000 - 81,000 = -322,000

HFE Details

Schedule & Duration

  • Nov. 7 - 6 a.m. begin upramp to powerplant capacity ( ~21,000 cfs)
  • Nov. 7 - 10:00 a.m. open bypass tubes, reach full bypass at 12:00 p.m.
  • Nov. 11 - 12:00 p.m. end of bypass
  • Nov. 12 - 3:00 a.m. end of HFE
  • Total duration: 5 days & 5 hours (96 hours at peak release)

Ramp Rates

  • Ramp up: 4,000 cfs/hr from 6,500 - 21,000 cfs, then 3,750 cfs/hr to peak (36,000 cfs)
  • Ramp down: 1,875 cfs/hr from 36,000 - 21,000 cfs, then 1,500 cfs/hr to 9,000 cfs

HFE Release Details

  • Maximum total release: 36,000 cfs
  • Powerplant capacity: 21,000 cfs
  • River outlet tubes: 15,000 cfs
  • Hydropower generation units available: 6
  • River outlet tubes: 4

Releases and Lake Elevation

  • Releases will range from 6,500 - 9,000 cfs prior to and after the HFE
  • Lake elevation is projected to decrease by approximately 2.5 feet during the 5-day period
  • Estimated acre feet of water bypassed during HFE: 125 kaf
  • November volume = 745 kaf

Costs

  • Estimated costs to hydropower: $1.4 million
  • Actual costs to hydropower: 1.15 million
  • Direct expenses for removal of concession assets: TBD

SUPPORTING DOCUMENTS

COMPLIANCE

CONCERNS

ADDITIONAL



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