- published: 26 Aug 2016
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An alluvial fan is a fan- or cone-shaped deposit of sediment crossed and built up by streams. If a fan is built up by debris flows it is properly called a debris cone or colluvial fan. These flows come from a single point source at the apex of the fan, and over time move to occupy many positions on the fan surface. Fans are typically found where a canyon draining from mountainous terrain emerges out onto a flatter plain, and especially along fault-bounded mountain fronts.
A convergence of neighboring alluvial fans into a single apron of deposits against a slope is called a bajada, or compound alluvial fan.
As a stream's gradient decreases, it drops coarse-grained material. This reduces the capacity of the channel and forces it to change direction and gradually build up a slightly mounded or shallow conical fan shape. The deposits are usually poorly sorted. This fan shape can also be explained with a thermodynamic justification: the system of sediment introduced at the apex of the fan will tend to a state which minimizes the sum of the transport energy involved in moving the sediment and the gravitational potential of material in the fan. There will be iso-transport energy lines forming concentric arcs about the discharge point at the apex of the fan. Thus the material will tend to be deposited equally about these lines, forming the characteristic fan shape.
Alluvial Fan Waterfall Pt 2
Alluvial Fan Waterfall
Debris flow fan experiment 1
Debris flow fan experiment 3
Boulder fields on a large desert alluvial fan - Going Alone
Colorado's Alluvial Fan Treacherous Trail Adventure
Alluvial Fan RMNP Colorado
Examining sediment layers in a desert alluvial fan - Going Alone
Aluvial Fan Falls
Alluvial Fan RMNP
Another view of the waterfall in Rocky Mountain Park.
Waterfall in Rocky Mountain National Park north of Estes Park
An experimental alluvial fan build up by 22 debris flows. Contributing to a master thesis at Utrecht University. This fan contains additional coarse material (2-5mm basalt) compared to reference experiments.
An experimental alluvial fan build up by 19 debris flows. Contributing to a master thesis at Utrecht University. Debris flows are similar to single flow reference experiments.
I discovered this boulder field during a failed attempt to reach a waterfall near the base of the highest escarpment in the continental United States. The boulder field was the cause of my inability to reach the falls, as the long delay in hopping across the rocks cost me a few hours of precious daylight. The boulder field was a fearful place, and not because of the mountain lion which hunt Mule Deer here (I didn't know about them until later), but because of the reality of being desperately exposed and alone on a flood plane where the sheer size of the rocks hinted at the overwhelming power of flash floods which spill from the mountains. The plain here is so enormous, requiring more than an hour to cross, that there would be no way to escape should the overcast skies suddenly open up with...
My name is Kurt Bell and I am delighted that you have taken some time to share a little of the experience of life with me. I'm available on social media at the links below and can be reached via email at dinnerbytheriver@gmail.com Find me on Facebook: https://www.facebook.com/LylesBrother Follow me on Twitter: https://twitter.com/softypapa Instagram: https://www.instagram.com/softypapa/ My blog: http://softypapa.wordpress.com ---- THE PATH OF WILDNESS The Path of Wildness is easy to find The course of a stream Leaves blown in the wind A beast's track through the brush And the direction of our first inclination The Path of Wildness is an answer and response to a prescribed way of life which may leave some individuals with a sense that their living is little more than a series of pre...
Rock scrambling in the Alluvial Fan in Rocky Mountain National Park by the Roaring River. Watch in 1080p. Filmed with Vupoint Action Cam VPS 100.
http://www.world-earthquakes.com This video is for education purpose only!
This is a tour of the new Alluvial Fan area in Rocky Mountain National Park as reshaped by the September 2013 flood. A lot of this is walking along Old Fall River Road which is now closed to traffic. There are also some nice scenes of the Roaring River in here. The original walking access trail to the waterfall area is completely covered with boulders and virtually impassable. As you can also see, the old bridge over the Roaring River is washed out and there is no bridge right now. This flood forced closure of the Old Fall River Road which goes on from the Alluvial Fan all the way to the Visitor Center and was one of the Park's most scenic drives. It is not clear when this road is going be open again.
2015 FMA Conference - Joint Arid Regions Committee Alluvial Fan Symposium - Kyle House Science of Alluvial fans and Surface Characterization. #BREAKINGDOWNRISK #FMA2015
2015 FMA Conference - Joint Arid Regions Committee Alluvial Fan Symposium - Dedication to Dick French by Julianne Miller (DRI) #BREAKINGDOWNRISK #FMA2015
8 HOURS Relaxing Nature Sounds-Meditation-White Noise Gentle Mountain Stream Full HD video! Rocky Mountain Relaxation - Fall River Yellow Flower Stream Enjoy the sights and sounds of this beautiful Rocky Mountain Stream for meditation, sleep, study and stress management. At 8 hours in length, this water sound is a perfect background to help you sleep, focus or practice yoga while drowning out distractions. This stream is off the road along Old Fall River Road in the Rocky Mountain National Park. Surrounded by pine and aspen trees and far enough off the road to remain unseen by many visitors, this is a relaxing location to take in the nature scene without the bustle of people. This stream is a beautiful scene for meditation and the gentle, cool mountain stream is the perfect white nois...
Rocky Mountain Relaxation - Alluvial Fan Waterfall Enjoy the sights and sounds of this beautiful Rocky Mountain Waterfall for relaxation, meditation and stress management. It’s a perfect background for a relaxing evening at home, studying and practicing yoga. This waterfall is a beautiful scene for meditation and the cool mountain river is the perfect white noise to help you relax or sleep for a nap. The Alluvial Fan is a feature in the Rocky Mountain National Park formed in 1982 when an old man-made dam at Lawn Lake broke, sending a powerful flood down the Roaring River, which cut through 6 miles of mountain before depositing thousands of tons of rock into the valley below. The Alluvial Fan was substantially changed again in 2013 after record breaking floods cleared away all of the tr...
Cross-country bike ride seen through video glasses. Starts at the base of the Sandia Tramway to Elena Gallegos Open Space area east of Albuquerque,NM. It is a serpentine trail contouring the fingers of an alluvial fan west of the Sandia Mountains. There are many rocks, plants and cacti to dodge.
8 HOURS Relaxing Nature Sounds - Rocky Mountain Waterfall Enjoy the relaxing white noise of this Rocky Mountain waterfall for meditation, sleep, study and stress management. At 8 hours in length, this water sound is a perfect background to help you sleep, focus or practice yoga while drowning out distractions. You can also use this calming sound as a stress management tool to help deal with stress, anxiety and panic attacks. The Alluvial Fan is a feature in the Rocky Mountain National Park formed in 1982 when an old man-made dam at Lawn Lake broke, sending a powerful flood down the Roaring River, which cut through 6 miles of mountain before depositing thousands of tons of rock into the valley below. The Alluvial Fan was substantially changed again in 2013 after record breaking floods cl...
Rocky Mountain Relaxation - Endovalley Meadow Waterfall Enjoy the sights and sounds of this beautiful Rocky Mountain Stream for relaxation, meditation and stress management. It’s a perfect background for a relaxing evening at home, studying and practicing yoga. This cool mountain stream is a beautiful scene for meditation and the perfect white noise to help you relax or sleep for a nap. Use it as a background when you have friends over, when you’re reading a book or having a relaxing evening at home, or just when you’re yearning for the soothing and calming feeling of being in the serenity of the mountains. It is perfect for relieving stress and refocusing your mind and contemplation. This stream is in a secluded area near Endovalley and the Old Fall River Road entrance in the Rocky Mou...
Rocky Mountain Relaxation - Endovalley Bridge Stream Enjoy the sights and sounds of this beautiful Rocky Mountain Stream for meditation, sleep, study and stress management. It’s a perfect background for a relaxing evening at home, studying and practicing yoga. This cool mountain stream is a beautiful scene for meditation and the perfect white noise to help you relax or sleep for a nap. Use it as a background when you have friends over, when you’re reading a book or having a relaxing evening at home, or just when you’re yearning for the soothing and calming feeling of being in the serenity of the mountains. It is perfect for relieving stress and refocusing your mind and contemplation. This stream is in a secluded area near Endovalley and the Old Fall River Road entrance in the Rocky Moun...