Ramsey Cascades is part of nearly 3,000 stream miles in Great Smoky Mountains National Park/NPS

Did you know, or have any idea, that Great Smoky Mountains National Park, that rumpled stretch of Appalachia, contains nearly 3,000 miles of streams?

That was one of the takeaways the park staff came up with after working with scientists from Tennessee, North Carolina, and the United States Geological Survey on a three-year stream mapping project. Park scientists used a combination of aircraft-mounted scanners and a Global Positioning System verification system to re-inventory streams throughout the park.

Using this modern mapping technology, scientists determined the park contains 2,900 miles of streams. Of those miles, 1,073 miles of streams are large enough to support fish. Previously, using topographic maps, the scientists estimated there to be approximately 2,000 miles of streams in the park. A water feature is considered a stream if it exhibits the hydrologic, geomorphologic, and biologic characteristics of moving water at least part of the year.

Working with the USGS, the park incorporated the new stream data into the National Hydrography Dataset (NHD), which allows the researchers and the public real-time access to detailed information about streams across the nation. Park staff and research partners rely heavily upon the accurate information in the NHD to manage park water quality and aquatic ecosystem health.

You can access the NHD data at this website. Remapped stream data can be found at this site.