File:Medano Creek Surge Flow.jpg
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Captions
Captions
Medano Creek Surge Flow
Summary
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| Description |
English: Medano Creek and Sand Creek exhibit a globally rare phenomenon call surge flow, a stream flowing in rhythmic waves on sand. Three elements are needed to produce waves: a relatively steep gradient to give the stream a high velocity; a smooth, mobile creekbed with little resistance; and sufficient water to create surges. In late spring, these elements combine to make waves at Great Sand Dunes.
As water flows across sand, sand dams or 'antidunes' form on the creek bed, gathering water. When the water pressure is too great, the dams break, sending down a wave about every 20 seconds. This photo was taken near peak flow on May 26, 2023. Due to lower snowpack, it was a lower-flow season. NPS/Patrick Myers |
| Date | |
| Source | https://www.flickr.com/photos/greatsanddunesnpp/53530703317/ |
| Author | Great Sand Dunes National Park and Preserve |
Licensing
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This image was originally posted to Flickr by Great Sand Dunes National Park and Preserve at https://flickr.com/photos/94707653@N06/53530703317. It was reviewed on 23 March 2024 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
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This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information. |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:25, 16 February 2024 | | 6,000 × 4,000 (23.8 MB) | Prolete (talk | contribs) | Uploaded a work by Great Sand Dunes National Park and Preserve from https://www.flickr.com/photos/greatsanddunesnpp/53530703317/ with UploadWizard |
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