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Location Folder Show Tree ROOT ScienceBase Catalog Users Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Downloadable (1) Map Service (1) OGC WFS Layer (1) OGC WMS Layer (1) OGC WMS Service (1) Shapefile (1) Contacts Carl J Legleiter U.S. Geological Survey David Boughton U.S. Geological Survey - ScienceBase Lee Harrison More... Categories Data (1) Tag Types Theme (1) Place (1) Tag Schemes None (1) Common geographic areas (1) View Results as: JSON ATOM CSV Browse Folder

Sediment grain size measurements from the upper Merced and Tuolumne Rivers in California Field measurements of riverbed grain size were collected from the Merced and Tuolumne Rivers in California to support research on anadromous salmonids. The grain size estimates included in this dataset were obtained from plan-view digital images of grains on exposed gravel and cobble bars (n = 109 for the Merced, n = 26 for the Tuolumne). The images were used to estimate grain-size distributions using the algorithm of Buscombe (2013). In this dataset we report the median grain size (D50), the 16th percentile (D16) and 84th percentile (D84). The spatial location of each measurement was obtained via a Trimble R10 RTK GPS receiver. The map projection and datum for these data from the Merced River are UTM Zone 11 N... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: California, California, Merced River, Steelhead, Tuolumne River, All tags... salmonid, sediment grain size, spawning habitat, spring-run Chinook Salmon, Fewer tags