Difference between revisions of "The HFE Page"
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[[File:PostHFEerosion.jpg|center|thumbnail|500px|Rate of post-HFE beach erosion]] | [[File:PostHFEerosion.jpg|center|thumbnail|500px|Rate of post-HFE beach erosion]] | ||
− | [[File:HFE_size_shape.jpg|center|thumbnail|500px|[https://www.usbr.gov/uc/ | + | [[File:HFE_size_shape.jpg|center|thumbnail|500px|[https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/AR3_Grams.pdf https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/AR3_Grams.pdf]]] |
− | [[File:SandbarMonitoring2016.jpg|thumbnail|center|500px|[https://www.usbr.gov/uc/ | + | [[File:SandbarMonitoring2016.jpg|thumbnail|center|500px|[https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/AR3_Grams.pdf https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/AR3_Grams.pdf]]] |
− | [[File:2012 2014 HFE response.jpg|thumbnail|center|500px|[https://www.usbr.gov/uc/ | + | [[File:2012 2014 HFE response.jpg|thumbnail|center|500px|[https://www.usbr.gov/uc/progact/amp/twg/2015-06-11-twg-meeting/Attach_02,.pdf https://www.usbr.gov/uc/progact/amp/twg/2015-06-11-twg-meeting/Attach_02,.pdf]]] |
− | [[File:2016 SedimentSummary.jpg|thumbnail|center|500px|[https://www.usbr.gov/uc/ | + | [[File:2016 SedimentSummary.jpg|thumbnail|center|500px|[https://www.usbr.gov/uc/progact/amp/twg/2016-02-26-twg-meeting/AR02_Grams.pdf https://www.usbr.gov/uc/progact/amp/twg/2016-02-26-twg-meeting/AR02_Grams.pdf]]] |
[[File:HFE windows.jpg|center|500px]] | [[File:HFE windows.jpg|center|500px]] | ||
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*[https://qcnr.usu.edu/wats/colorado_river_studies/files/documents/Grams.pdf Geomorphic Changes to the River Channels and Flood Plains of the Colorado River System: The Planned and Unplanned Effects of Water Development] | *[https://qcnr.usu.edu/wats/colorado_river_studies/files/documents/Grams.pdf Geomorphic Changes to the River Channels and Flood Plains of the Colorado River System: The Planned and Unplanned Effects of Water Development] | ||
*[https://www.usbr.gov/uc/progact/amp/amwg/2018-08-22-amwg-meeting/Attach_07.pdf High Flow Experiments PPT] | *[https://www.usbr.gov/uc/progact/amp/amwg/2018-08-22-amwg-meeting/Attach_07.pdf High Flow Experiments PPT] | ||
− | *[https://www.usbr.gov/uc/ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2018-06-25-twg-meeting/Attach_14.pdf Discussion about the High Flow Experimental Design PPT] |
− | + | ||
*[[Media:GCWC LTEMP Springtime HFE Comments Feb 24 2016.pdf| GCWC LTEMP comments on springtime HFEs]] | *[[Media:GCWC LTEMP Springtime HFE Comments Feb 24 2016.pdf| GCWC LTEMP comments on springtime HFEs]] | ||
− | *[https://www.usbr.gov/uc/ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2018-04-23-twg-meeting/Attach_12.pdf Evaluating the Frequency of Triggered Spring High Flow Experiments (HFEs) Assumed in the Long-Term Experimental and Management Plan PPT] |
− | *[https://www.usbr.gov/uc/ | + | *[https://www.usbr.gov/uc/progact/amp/amwg/2018-02-14-amwg-meeting/Attach_12b.pdf Considerations for Seasonal Scheduling of High Flow Experiments PPT] |
− | *[https://www.usbr.gov/uc/ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2018-01-25-twg-meeting/AR12.pdf Effects of HFEs on Growth and Population Dynamics of Rainbow Trout in Glen Canyon and Mable Canyon PPT] |
− | *[https://www.usbr.gov/uc/ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2018-01-25-twg-meeting/AR03.pdf Sandbars and Sediment Storage Marble and Grand Canyons: Response to Recent High-flow Experiments and Long-term Trends PPT] |
*[https://doi.org/10.1016/j.sedgeo.2017.11.007 Mueller et al., 2018, Variability in eddy sandbar dynamics during two decades of controlled flooding of the Colorado River in Grand Canyon: Sedimentary Geology, v. 363, p. 181-199] | *[https://doi.org/10.1016/j.sedgeo.2017.11.007 Mueller et al., 2018, Variability in eddy sandbar dynamics during two decades of controlled flooding of the Colorado River in Grand Canyon: Sedimentary Geology, v. 363, p. 181-199] | ||
'''2017''' | '''2017''' | ||
− | *[https://www.usbr.gov/uc/ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/AR3_Grams.pdf Sandbars and Sediment Storage in Marble and Grand Canyons: Response to Recent High-flow Experiments and Long-term Trends PPT] |
− | *[https://www.usbr.gov/uc/ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/AR15_Korman.pdf Boom-and-Bust Cycles in the Population of Rainbow Trout in Glen Canyon and Effect of Fall High Flow Experiments PPT] |
'''2016''' | '''2016''' | ||
*[[Media:Hi Flow Beaches 2016.pdf| The Grand Canyon Private Boater’s Association’s (GCPBA) comments regarding the recently concluded High Flow Experiment releases]] | *[[Media:Hi Flow Beaches 2016.pdf| The Grand Canyon Private Boater’s Association’s (GCPBA) comments regarding the recently concluded High Flow Experiment releases]] | ||
− | *[ | + | *[https://www.usbr.gov/uc/progact/amp/amwg/2016-08-24-amwg-meeting/Attach_11c.pdf Science Behind High Flow Experiment Planning: From Chasing Storms in the Paria River to Serving Data on the Web] |
− | *[ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2016-02-26-twg-meeting/Attach_04a.pdf Sand Trigger for High-flow Experimental Protocol] |
− | *[ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2016-02-26-twg-meeting/Attach_04b.pdf Introduction of a Motion to TWG Regarding Clarification of the High Flows Protocol for Springtime HFEs: Draft for SCAHG Consideration and Review] |
'''2014''' | '''2014''' | ||
− | *[ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2014-10-28-twg-meeting/Attach_13.pdf Modeling Long Term Effects of HFEs on Trout and HBC] |
− | *[ | + | *[https://www.usbr.gov/uc/progact/amp/amwg/2014-08-27-amwg-meeting/Attach_10.pdf Minute 319/Pulse Flow] |
− | *[ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2014-01-30-twg-meeting/Attach_02b.pdf Update on High Flow Experiments Released from Glen Canyon Dam] |
'''2013''' | '''2013''' | ||
*[http://www.earthmagazine.org/article/releasing-flood-controversy-colorado-river Earth Magazine 2013 Releasing a flood of controversy on the Colorado River] --This article sets the basis for the HFE, provides the history of past HFEs, and discusses the issues. | *[http://www.earthmagazine.org/article/releasing-flood-controversy-colorado-river Earth Magazine 2013 Releasing a flood of controversy on the Colorado River] --This article sets the basis for the HFE, provides the history of past HFEs, and discusses the issues. | ||
− | *[ | + | *[https://www.usbr.gov/uc/progact/amp/twg/2013-11-06-twg-meeting/Attach_02b.pdf HFE Protocol Decision Process] |
− | *[https://www.usbr.gov/uc/ | + | *[https://www.usbr.gov/uc/progact/amp/amwg/2013-08-08-amwg-meeting/Attach_09.pdf Planning for a Fall HFE] |
*[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/13feb20/Attach_06a.pdf High Flow Experiment Update ] | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/13feb20/Attach_06a.pdf High Flow Experiment Update ] | ||
*[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/13feb20/Attach_06b.pdf USGS Information and Results from HFE] | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/13feb20/Attach_06b.pdf USGS Information and Results from HFE] |
Revision as of 15:58, 18 January 2019
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High-Flow Experimental (HFE) ReleasesPurpose and GoalThe purpose of HFEs is to determine if sandbar building during HFEs exceeds sandbar erosion during periods between HFEs, such that sandbar size can be increased or maintained over several years. LTEMP HFE ProtocolAs described in the LTEMP ROD, HFEs are experimental in nature and are designed to achieve a better understanding of whether, how, and when to incorporate high releases into future dam operations in a manner that maintains or improves beaches, sandbars, and associated habitat. The LTEMP HFE Protocol establishes a decision-making framework consisting of three components: (1) planning and budgeting, (2) modeling, and (3) decision and implementation. Under the LTEMP, HFE releases are restricted to limited periods of the year when the highest volumes of sediment are most likely available for building sandbars. Sediment-triggered HFEs may be made in spring (March or April) or fall (October or November; Figure 1). Fall extended-duration HFEs range from greater than 96 hr to 250 hr. Spring and fall HFEs that are not extended-duration range from less than 1 hr to 96 hr. Proactive HFEs may be implemented in spring or early summer (April, May or June), and have a duration range up to 24 hr. HFE magnitudes range from 31,500 cubic feet per second (cfs) to 45,000 cfs. The frequency of HFEs is determined by tributary sediment inputs, annual release volumes, resource conditions, and decisions of the Department. Extended-duration fall HFEs are limited to a frequency of 4 times total in the 20-year LTEMP period. HFE Sand Budget ModelThe LTEMP HFE Protocol uses predictive models to make recommendations for the magnitude and duration of potential HFEs using real-time measurements and models of sand inflow from the Paria River and forecasted hydrologic data to determine whether suitable sediment and hydrology conditions exist for a high-flow experimental release. A sand transport/budget model (Wright et al. 2010) was used to predict the mass of sand that would be transported by an HFE and to estimate if a proposed HFE would transport more or less sand than had been delivered from the Paria River to the Colorado River during the fall accounting period (July 1 to November 30). Only HFE durations that resulted in a “positive sand balance” were considered. Output of the modeling runs provides the initial recommendation for the magnitude and duration of the HFE. However, because modeling only considers a simple range of possible HFE peak magnitudes and durations, the Protocol includes a review of the model output that may modify the recommended HFE to benefit relevant resources. (2018 HFE Tech Team Report) |
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