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

ChadHoover added a video. 2 days ago

New Seaguar Ripping and Finesse Lines

Cody Meyer, FLW Pro, introduces the two newest lines from Seaguar. Ripping is a new monofilament line that's great for topwater. Finesse is great...

ChadHoover added a video. 2 days ago

FIRST LOOK Yakima Showdown Kayak and SUP Load...

Jonny Wood with Yakima gives us the first look at the Yakima Showdown. It's a kayak or SUP load assist that slides from the rack, to the side of...

ChadHoover added a video. 2 days ago

ANGLR Fishing and Weather Tracker App

The ANGLR Tracker paired with a free smartphone app tracks all of your fishing catches for you while you are on the water. No more paper logs that...

ChadHoover added a video. 2 days ago

New Jackall Baits for 2017 with JP DeRose

JP DeRose walks you through two new baits from Jackall for 2017. The ChanWake is a sub-surface prop bait and the Firecracker is a new noisy buzzbait.

jblakeney added a video. 3 days ago

Choosing the Right Stand Up Paddleboard (BIC SUP)

In this video BIC SUPs Jimmy Blakeney helps you choose the right stand up paddleboard for you.

jblakeney added a video. 3 days ago

Sustainable Stand Up Paddleboard Construction -...

In this video BIC SUPs Jimmy Blakeney explains how their exclusive technologies are built and the sustainable efforts BIC Sport uses during the...

jblakeney added a video. 3 days ago

2017 BIC SUP Paddle Range - Stand Up...

BIC SUP paddles are designed, tested and built for performance, durability and versatility in a wide range of conditions. Available in three ranges:...

jblakeney added a video. 3 days ago

Stand Up Paddleboard (SUP) Care & Maintenance

In this video BIC SUPs Jimmy Blakeney discusses how to care for and properly maintain your stand up paddleboard.

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.