Probability of Streamflow Permanence (PROSPER) Model version 2.1 Output Layers for the Pacific Northwest region, 2004 - 2016

This data release contains the model inputs, outputs, and source code (written in R) for a redeveloped PRObability of Streamflow PERmanence (PROSPER) model (version 2.1) that had previously been developed for the Pacific Northwest Region (PROSPER_PNW_2), and a raster data set which shows where influential predictor values were outside the range of calibration data. The PROSPER-PNW version 2.1 model, a random forest model, was redeveloped in the Ranger R package using all the original model inputs consistent with PROSPER_PNW_2 to produce annual streamflow permanence probabilities for calendar years 2004-2016 at a 30-meter stream grid resolution that approximately corresponds to flowlines consistent with the National Hydrography Dataset Medium Resolution (NHD MR). Updated streamflow permanence probabilities ranged from 0 to 1 and were adjusted for the spatial variability in threshold determination of membership of permanence class. The adjusted streamflow permanence probabilities also have an associated estimated standard error. Streamflow permanence class rasters are class determinations based on the adjusted streamflow permanence probability and standard error and replaces the streamflow permanence class from PROSPER_PNW_2.