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Niobrara National Scenic RiverBerry Spring
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Niobrara National Scenic River
Hydrology
Surge flow

NPS photo

Surge Flow Waves

A unique feature of the Niobrara is a phenomenon known as surge flow. The river's combination of velocity, gradient, and sediment load cause the formation of sand ridges that result in short-term standing waves. Click for the bulletin on surge flow. You will need Acrobat Reader to open this file.

Surge flow is recorded at one other National Park Service site; Great Sand Dunes National Park and Preserve, in Colorado.

Paleontologist displays fossil rhino vertebra  

Did You Know?
The Niobrara River valley has several globally and nationally significant fossil mammal sites. Paleontologists have found mammals such as camels, horses, mastodons and rhinos. Click "More" to visit the Niobrara National Scenic River "Fossils" page.
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Last Updated: August 16, 2008 at 19:04 EST