Difference between revisions of "GCDAMP- HFE 2012"
From Glen Canyon Dam AMP
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== COMPLIANCE == | == COMPLIANCE == | ||
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== SAND TRANSPORT caused by 2012 HFE == | == SAND TRANSPORT caused by 2012 HFE == | ||
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*@ RM225 = 970,000 metric tons | *@ RM225 = 970,000 metric tons | ||
*At Diamond Creek (RM225), 1,810,000 metric tons were transported by the Colorado River between July 1, 2012, and July 1, 2013. Thus, '''54% of the total delivery of sand to Lake Mead reservoir during this 1-year period occurred during approximately 5 days of the November 2012 HFE.''' For comparison, 45% of the total delivery of sand to Lake Mead reservoir during calendar year 2008 occurred during the 2008 HFE; the 2004 HFE delivered 40% of the total sand delivered to Lake Mead in calendar year 2004. | *At Diamond Creek (RM225), 1,810,000 metric tons were transported by the Colorado River between July 1, 2012, and July 1, 2013. Thus, '''54% of the total delivery of sand to Lake Mead reservoir during this 1-year period occurred during approximately 5 days of the November 2012 HFE.''' For comparison, 45% of the total delivery of sand to Lake Mead reservoir during calendar year 2008 occurred during the 2008 HFE; the 2004 HFE delivered 40% of the total sand delivered to Lake Mead in calendar year 2004. | ||
| + | *500,000 tons of sediment is equivelant to filling a football field 230 feet deep (KSalazar) | ||
| + | [[File:Football field- PIC.jpg|thumb]] | ||
| − | == | + | == RESULTS OF 2012 HFE == |
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*'''Substantial Gain''' to '''18 Sandbars'''--- 55% of sites. | *'''Substantial Gain''' to '''18 Sandbars'''--- 55% of sites. | ||
*'''No Substantial Change''' in '''12 sandbars''' --- 36% of sites. | *'''No Substantial Change''' in '''12 sandbars''' --- 36% of sites. | ||
*'''Substantial Loss''' of '''3 sandbars''' --- 9% of sites. | *'''Substantial Loss''' of '''3 sandbars''' --- 9% of sites. | ||
| − | *'''RESULTS 6 Months Later (MAY)''' | + | |
| − | *Most sandbars constructed by the 2012 HFE eroded by May. | + | *'''RESULTS: 6 Months Later (MAY 2013)''' |
| + | *Most sandbars constructed by the 2012 HFE eroded by May 2013. | ||
*'''8''' sites were still somewhat larger, '''14''' sites remained the same, '''7''' were smaller. | *'''8''' sites were still somewhat larger, '''14''' sites remained the same, '''7''' were smaller. | ||
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*[http://www.azcentral.com/video/1982045199001 AZ News Central Video- HFE, Sediment, Jack Schmidt, monitoring LINK] | *[http://www.azcentral.com/video/1982045199001 AZ News Central Video- HFE, Sediment, Jack Schmidt, monitoring LINK] | ||
*[http://www.azcentral.com/news/articles/20130124feds-grand-canyon-flood-success-beaches-habitat-restored.html?nclick_check=1 Feds’ AZ Central News_ Grand Canyon flood a success] | *[http://www.azcentral.com/news/articles/20130124feds-grand-canyon-flood-success-beaches-habitat-restored.html?nclick_check=1 Feds’ AZ Central News_ Grand Canyon flood a success] | ||
| − | *[http://gcdamp.com/images/1/18/SO12_Stewart.pdf | + | *[http://gcdamp.com/images/1/18/SO12_Stewart.pdf Arizona Game and Fish Wildlife Views article titled "A Changing Grand Canyon: Can high flows help?" (Published October 2012) -Bill Stewart] |
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Contributor: | Contributor: | ||
Category: Sediment, Recreation, Water delivery | Category: Sediment, Recreation, Water delivery | ||
Revision as of 14:13, 11 July 2016
| High Flow Experiment- 2012 | |
 |
- HFE DETAILS -SUMMARY: ---DRAFT---- THIS PAGE IS UNDER CONSTRUCTION
- USBR 2012 HFE LINK
Contents
SUPPORTING DOCUMENTS
COMPLIANCE
SAND TRANSPORT caused by 2012 HFE
- @ RM30 = 390,000 metric tons
- @ RM60 = 380,000 metric tons
- @ RM87 = 540,000 metric tons
- @ RM225 = 970,000 metric tons
- At Diamond Creek (RM225), 1,810,000 metric tons were transported by the Colorado River between July 1, 2012, and July 1, 2013. Thus, 54% of the total delivery of sand to Lake Mead reservoir during this 1-year period occurred during approximately 5 days of the November 2012 HFE. For comparison, 45% of the total delivery of sand to Lake Mead reservoir during calendar year 2008 occurred during the 2008 HFE; the 2004 HFE delivered 40% of the total sand delivered to Lake Mead in calendar year 2004.
- 500,000 tons of sediment is equivelant to filling a football field 230 feet deep (KSalazar)
RESULTS OF 2012 HFE
- Substantial Gain to 18 Sandbars--- 55% of sites.
- No Substantial Change in 12 sandbars --- 36% of sites.
- Substantial Loss of 3 sandbars --- 9% of sites.
- RESULTS: 6 Months Later (MAY 2013)
- Most sandbars constructed by the 2012 HFE eroded by May 2013.
- 8 sites were still somewhat larger, 14 sites remained the same, 7 were smaller.
Effects on Resources
- Cultural: No adverse effects to historic properties of the 2012 HFE were identified. (USBR Memo 2013)
- HBC & Native Fish: No measuable positive effect on HBC or other native fish. (Provisional- unpublished data)
- RBT Monitoring: RBT in Glen Canyon moved very little during the period around HFE.
- Foodbase: Initial results do not indicate a strong effect on food base-- but is expected to take longer to recover over the winter period (GCMRC unpublished data)
- Kanab Ambersnail: FWS found in its 2011 BO that this loss of snails/ habitat would not jeopardize the continued existence of the snail
- Whirling Disease: HFE's pose little risk of spreading whirling disease (GCMRC Assessment)
- AZ News Central Video- HFE, Sediment, Jack Schmidt, monitoring LINK
- Feds’ AZ Central News_ Grand Canyon flood a success
- Arizona Game and Fish Wildlife Views article titled "A Changing Grand Canyon: Can high flows help?" (Published October 2012) -Bill Stewart
Contributor: Category: Sediment, Recreation, Water delivery
