File:2018 High-flow Release - Glen Canyon Dam - 47396916152.jpg

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Description	English: In the foreground, jets of water being released from the base of Glen Canyon Dam. The dam and sandstone canyon walls are visible in the background. NPS/M.Quinn Between November 5-10, 2018, the U.S. Department of Interior increased the release from Glen Canyon Dam for a high-flow experimental release (HFE) of approximately 38,100 cubic feet per second (cfs) for 3 days. (60 hours) The goal of the high-flow experiment was to move sand stored in the river channel and redeposit it to rebuild eroded sandbars and beaches downstream of the Paria River in Grand Canyon National Park. This release followed the science-based Protocol for High-Flow Experimental Releases from Glen Canyon Dam approved in the 2016 Long-Term Experimental and Management Plan Record of Decision for Glen Canyon Dam operations and is a component of the Department’s compliance with the Grand Canyon Protection Act of 1992. The Grand Canyon Protection Act mandates that Glen Canyon Dam be operated in a manner that protects, mitigates adverse impacts to, and improves the values for which Grand Canyon National Park and Glen Canyon National Recreation Area were established. Previous experimental releases from Glen Canyon Dam have demonstrated that it is possible to rebuild beaches and sandbars in Grand Canyon via high flows. More information: www.nps.gov/grca/learn/nature/hfe.htm
Date	5 November 2018, 11:21:28
Source	https://www.flickr.com/photos/50693818@N08/47396916152/
Author	Grand Canyon NPS

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This image was originally posted to Flickr by Grand Canyon NPS at https://flickr.com/photos/50693818@N08/47396916152. It was reviewed on 6 April 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

6 April 2020

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	03:18, 6 April 2020		5,000 × 2,691 (10.08 MB)	Killarnee (talk \| contribs)	Uploaded a work by Grand Canyon NPS from https://www.flickr.com/photos/50693818@N08/47396916152/ with UploadWizard

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Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Camera manufacturer	NIKON CORPORATION
Camera model	NIKON D7000
Exposure time	1/800 sec (0.00125)
F-number	f/14
ISO speed rating	500
Date and time of data generation	11:21, 5 November 2018
Lens focal length	18 mm
Credit/Provider	NPS/M.Quinn
Image title	In the foreground, jets of water being released from the base of Glen Canyon Dam. The dam and sandstone canyon walls are visible in the background. NPS/M.QuinnBetween November 5-10, 2018, the U.S. Department of Interior increased the release from Glen Canyon Dam for a high-flow experimental release (HFE) of approximately 38,100 cubic feet per second (cfs) for 3 days. (60 hours)The goal of the high-flow experiment was to move sand stored in the river channel and redeposit it to rebuild eroded sandbars and beaches downstream of the Paria River in Grand Canyon National Park.This release followed the science-based Protocol for High-Flow Experimental Releases from Glen Canyon Dam approved in the 2016 Long-Term Experimental and Management Plan Record of Decision for Glen Canyon Dam operations and is a component of the Department’s compliance with the Grand Canyon Protection Act of 1992.The Grand Canyon Protection Act mandates that Glen Canyon Dam be operated in a manner that protects, mitigates adverse impacts to, and improves the values for which Grand Canyon National Park and Glen Canyon National Recreation Area were established.Previous experimental releases from Glen Canyon Dam have demonstrated that it is possible to rebuild beaches and sandbars in Grand Canyon via high flows.
Short title	2018 High Flow Release - Glen Canyon Dam
Width	9,464 px
Height	5,094 px
Bits per component	8 8 8
Compression scheme	Uncompressed
Pixel composition	RGB
Orientation	Normal
Number of components	3
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Data arrangement	chunky format
Software used	Adobe Photoshop CC (Windows)
File change date and time	10:15, 23 March 2019
Exposure Program	Not defined
Exif version	2.21
Date and time of digitizing	11:21, 5 November 2018
APEX shutter speed	9.643856
APEX aperture	7.61471
APEX exposure bias	0
Maximum land aperture	3.6 APEX (f/3.48)
Metering mode	Pattern
Light source	Unknown
Flash	Flash did not fire, compulsory flash suppression
DateTimeOriginal subseconds	8
Color space	Uncalibrated
Sensing method	One-chip color area sensor
File source	Digital still camera
Scene type	A directly photographed image
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Auto white balance
Digital zoom ratio	1
Focal length in 35 mm film	27 mm
Scene capture type	Standard
Scene control	Low gain up
Contrast	Normal
Saturation	Normal
Sharpness	Normal
Subject distance range	Unknown
Serial number of camera	3052643
Lens used	18.0-105.0 mm f/3.5-5.6
Rating (out of 5)	0
Date metadata was last modified	03:15, 23 March 2019
Unique ID of original document	F1E290608686962A8AD02327110C2DD8
Copyright status	Copyright status not set
Keywords	high flow Event Colorado River Bureau of Reclamation Department of Interior Glen Canyon Dam dam November 5 2018 2018 high flow experiment Grand Canyon Bureau of Reclamation Western Area Power Administration Colorado River Western
IIM version	4