Ephemeral Stream Channel Stability Data from the Grand Valley, Western Colorado, 2018-21

This U.S. Geological Survey (USGS) data release provides the data used to predict areas with the greatest probability of ephemeral stream channel instability on north side of the Grand Valley in western Colorado, during 2018-20. The USGS developed a method for automatically extracting channel cross-section geometry from existing remotely sensed terrain models. Based on estimated flood stage and surrogate streamflows, hydraulic characteristics were calculated. The channel geometries and hydraulic characteristics were used to estimate channel stability using a statistical model. Cross-section stabilities were determined from a stream channel stability assessment for a subset of 1,406 visited (field observed) locations out of a needed 13,415 cross sections, which were delineated from remotely sensed terrain models. Specifically, this data release includes delineated stream channels, automatically extracted cross-section profiles, survey data, estimated stream flows, Manning roughness coefficients, digital images, channel geometry characteristics and hydraulics, and channel stabilities. This data release contains subset entity zipped folders, each contains a specific metadata file.