Colorado River milage system and ancillary attribute data for connecting to hydrodynamic model output in Glen Canyon, AZ

These data were compiled to support stranding risk modeling of young-of-year rainbow trout in Glen Canyon resulting from fluctuating flows from Glen Canyon Dam, called Trout Management Flows (TMFs). The objective of our study was to evaluate the stranding risk associated with different TMFs. We used the results of a 2-dimensional hydrodynamic model (Wright and others, 2024) as input to a rainbow trout stranding model and described in the associated Larger Work Citation. This data table was developed to link the data output tables of Wright and others (2024) and the trout stranding model to a commonly used and standardized measure of distance along the Colorado River between Glen Canyon Dam and Lees Ferry, AZ (Gushue 2019). The data are organized based on the spatial coordinates of the center point of cells in the hydrodynamic model (Wright and others 2024). The data table represents spatial grid coordinates and locations to the nearest hundredth mile for each row and column of a bathymetry grid that are closest to the Colorado River centerline. The data table includes additional data values that represent bed elevations and distances of the center point for each selected bathymetry grid cell to the nearest Colorado River mile point location. Distances in miles follow a standard referencing system where miles are measured as negative values upstream from Lees Ferry (river mile 0) to Glen Canyon Dam (river mile -15.85). The 2-dimensional hydrodynamic model and trout stranding model described in the associated Larger Work Citation extend from river mile -0.02 to river mile -15.71. This data table provides a way to assign a Colorado River mile to each computational grid cell of Wright and others (2024) and the trout stranding risk model in the associated Larger Work Citation that we used to evaluate how flow influences depth, velocity, and stranding risk of Trout Management Flows. This table can be used by other studies to link the hydrodynamic model to the standard Colorado River reference system on the Colorado River in Glen Canyon.