Mississippi National River and Recreation Area Bathymetry Hillshade - Mississippi River, 2019-2021

Start Date

2019-06-10

End Date

2021-03-18

Strange, J.M., Hanson, J.L., Sattler, S.R., and Hoy, E.E., 2021, Mississippi National River and Recreation Area Bathymetry Hillshade - Mississippi River, 2019-2021: U.S. Geological Survey data release, https://doi.org/10.5066/P9BYGUQL.

The National Park Service's (NPS) Mississippi National River and Recreation Area (MISS) and the St. Croix National Scenic Riverway (SACN) have established high value habitat corridors for threatened and endangered native mussels, including the Winged Mapleleaf and Higgins’ Eye Pearlymussel. Underwater sonar, a hydroacoustic remote sensing technology, is a valuable tool for mapping physical habitat features in aquatic systems for sedentary biota such as freshwater mussels and has the potential to identify and quantify physical habitat features to inform management decisions. The USGS acquired high-resolution multibeam and sidescan sonar for approximately 115 kilometers of the Mississippi River, 6 kilometers of the Minnesota River, and 48 kilometers of the lower St. Croix River. Additionally, small areas of high-valued mussel habitat had additional data collected, which included acoustic Doppler current profiler (ADCP) and underwater videos — to help interpret and map physical habitat characteristics. A hillshade is a 3-D representation of the surface using patterns of light and shadow, and enhances the 3-dimensional appearance of the terrain making it easier to identify riverbed features.

ScienceBase WMS

ScienceBase WCS

• Upper Midwest Environmental Sciences Center (UMESC)

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