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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Raster (1) Shapefile (1) Types Downloadable (2) Map Service (2) OGC WMS Layer (2) OGC WMS Service (2) GeoTIFF (1) Raster (1) Shapefile (1) Contacts Carl J Legleiter U.S. Geological Survey U.S. Geological Survey - ScienceBase Lee Harrison Integrated Modeling & Prediction Division Colin Nicol Ryan Richardson Tag Types Theme (2) Place (2) Tag Schemes None (2) Common geographic areas (1) View Results as: JSON ATOM CSV

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 Topo-bathymetric digital elevation models of the upper Merced and Tuolumne Rivers in California derived from hyperspectral image data and near-infrared LiDAR acquired in 2014 This child data release includes fused topo-bathymetric digital elevation models of the Merced and Tuolumne Rivers in California used to support research on anadromous salmonids. The purpose of this study was to calculate the capacity for reintroduction of salmonids above impassable barriers. Airborne, near-infrared (NIR) LiDAR and hyperspectral imagery were acquired simultaneously in September 2014 from a Cessna Caravan, with the LiDAR data used to map topography of dry land and the imagery used to map water depth in the wetted channel. Topo-bathymetric DEMs of channels and floodplains with 1-m resolution were constructed for the study reaches by using remotely sensed hyperspectral image data to estimate water... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Raster; Tags: Bathymetry, California, Cherry Creek, Clavey River, Digital elevation model (DEM), All tags... Floodplain, LiDAR, Merced River, River channel, Sierra Nevada, South Fork Merced River, Topo-bathymetric, Topography, Tuolumne River, Fewer tags