Support American Whitewater! Jackson Kayak

[please login to make this ad block disappear]

Grand Gets CFS Boost from Experimental Release

Okay, we've all heard enough about the shut-down in the Grand Canyon. Now let's hear it for a little opening up...of the flood gates. While not quite at Kenton Grua's 70,000 cfs level when he set the record speed descent run as documented in Kevin Fedarko's acclaimed The Emerald Mile, river runners reveled in a nearly 37,000-cfs experimental release in mid-November, bringing monstrosities like Lava, Crystal Hermit and more roaring to life...

Grand Slam: The Bureau of Wreck released 37,000 cfs into the Grand Canyon in mid-November.

"The sad part is these "high flows" almost achieve the pre-dam "lowest" annual high flow,"

From November 11-16, 2013, the Department of Interior conducted a High Flow Experiment (HFE) linked to sediment input and other resource conditions below Glen Canyon Dam. During the HFE, total releases from Glen Canyon Dam at full powerplant capacity and bypass reached a top output of 37,200 cfs - more than enough to challenge big water rowers and kayakers. The releases were maintained at peak release for four days, with the total experiment, including ramping, lasting five days - dropping the elevation of Lake Powell approximately 2 ½ feet.

Releases prior to and after the HFE fluctuated between 5,000 cfs and 8,000 cfs.

As welcoming as these releases were for river runners, some also expressed remorse and a yearning for when these kind of flows occurred annually.

"The sad part is these "high flows" almost achieve the pre-dam "lowest" annual high flow," says Tom Martin, executive director of River Runners for Wilderness.

Since 2000, total Colorado Basin storage has experienced year to year increases and decreases in response to wet and dry hydrology, ranging from a high of 94% of capacity at the beginning of 2000 to a low of 50% of capacity in 2014. "One wet year can significantly increase total system reservoir storage, just as persistent dry years can draw down the system storage," says the Bureau of Reclamation's Katrina Grantz.

With the Grand Canyon measuring 277 miles long and the water traveling at an estimated 5 mph, this means that from the last day of the release, Nov. 16, the high flows would've taken more than two days to reach the canyon's end.

The releases were designed to restore beaches, stir up sediment and perform other ecological benefits of a normal flood cycle.

No word on how many raft flips they caused.
Paddling Life News on Playak is © and presented by:

 

Sponsors

JKPalm

 

NRS

Login to post here

GuyThaLizard added a video. 14 hours 3 minutes ago

Our RV skirting DIY completed 2017 09 21

LogDate: 2017-09-21 We are spending the winter in Canada this season so we are setting up our RV for winter snow conditions. This is our video of...

jblakeney added a video. yesterday

How to Get Started Stand Up Paddle Fishing | SUP...

Bri Andrassy shares some tips on how to get started stand up paddle fishing. In SUP fishing 101, Bri covers some of her favorite set ups on her...

supzero added a video. yesterday

#PPG2017 Road Map To Doheny State Beach

Getting to know the surf zone at Doheny State Beach, California, the venue of the 2017 Pacific Paddle Games presented by Salt Life.

jblakeney added a video. 3 days ago

Paddling with Your Core | 3 Basic Stand Up...

In this video, Anna Levesque explains the importance of paddling with your core, and goes over 3 basic stand up paddling strokes to master....

corran added a video. 3 days ago

Soul Waterman 303 explained

what is the point of this new school, old school kayak design. Who is it for, how would you use it and where would you use it?

jblakeney added a video. 3 days ago

Au Costa Rica avec le champion du monde Martin...

Champion du monde de stand up paddle dans sa catégorie, Martin Vitry, est un ambassadeur pour Oxbow SUP, des planches de Paddle fabriquées en France...

AxelBischoff added a video. 3 days ago

Paddle Expo 2017 - die Neuigkeiten des Stand Up...

SIREN SUPsurfing auf der Paddel Expo 2017 in Nürnberg alle Neuigkeiten und Produktinformationen von der aktuellen

EJ added a video. 3 days ago

MixMaster Slicey Kayak Hits Gauley River

Dane Jackson, Clay Wright, and Eric Jackson enjoy slicing and dicing their way down the Gauley River in West Virginia! GoPro cameras capture the...

See the AUP for our Acceptable Use Policy and a Privacy Statement. Verein Playak is responsible for all editorial content on this site (including all graphics). No part of this site may be duplicated in any way without explicit permission from Verein Playak. Verein Playak takes great care to only publish original content, but since part of the content is user generated, we cannot always guarantee this 100%. If you notice any copyright violations, please let the editors know through the contact form and they will take appropriate action immediately. As a news and information platform, we republish small text snippets and thumbnail images, but always link to original content on other sites, and thus aim to adhere to a 'Fair Use' policy. If you believe we violate this policy in any particular case, please contact us directly and we'll take appropriate action immediately.