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National Hydrologic Model Alaska Domain parameter database, version 1 This data release contains input data for hydrologic simulations of the Alaska Domain application of the U.S. Geological Survey (USGS) Precipitation Runoff Modelling System (PRMS) as implemented in the National Hydrologic Model (NHM) infrastructure (Regan and others, 2018). The NHM Alaska Domain parameter database consists of 114 parameter files in ASCII format (CSV), two files needed to run the Alaska Domain PRMS (control.fy19deliverable and fy19_deliv.param), two xml files (dimensions.xml and parameters.xml) containing descriptive information about the parameters, and a table that defines each parameter (AK_paramDB_datadictionary.csv). The Entity and Attribute element of this metadata record describe the data... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alaska, Canada, Geography, Glaciology, Hydrology, All tags... Information Sciences, Land Use Change, Soil Sciences, USGS Science Data Catalog (SDC), Water Resources, climatologyMeteorologyAtmosphere, environment, imageryBaseMapsEarthCover, inlandWaters, Fewer tags Base flow estimation via optimal hydrograph separation at CONUS watersheds and comparison to the National Hydrologic Model - Precipitation-Runoff Modeling System by HRU calibrated version Optimal hydrograph separation (OHS) is a two-component, hydrograph separation method that uses a two-parameter, recursive digital filter (RDF) constrained via chemical mass balance to estimate the base flow contribution to a stream or river (Rimmer and Hartman, 2014; Raffensperger et al., 2017). A recursive digital filter distinguishes between high-frequency and low-frequency discharge data within a hydrograph, where high-frequency data corresponds to quick flow or storms and low-frequency data corresponds to base flow. The two parameters within the RDF are alpha and beta, both are unitless. Alpha is defined as the recession constant and typically found through recession analysis. For the purposes of this data release... Categories: Data; Types: Citation, Data, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, ScienceBase Citation; Tags: National Hydrologic Model, Precipitation Runoff Modeling System, USGS Science Data Catalog (SDC), Water Quality, Water Resources, All tags... base flow, conterminous U.S., geoscientificInformation, hydrograph separation, optimal hydrograph separation, Fewer tags Geospatial Fabric for the National Hydrologic Model Alaska Domain, version 1 This data release contains a geospatial dataset for the U.S. Geological Survey Precipitation Runoff Modeling System (PRMS) used to drive the National Hydrologic Model (NHM). The Alaska Geospatial Fabric v1 is the spatial representation of the hydrologic response units (HRUs) used for the PRMS NHM Alaska domain. These HRUs were generated using the twelve-digit Hydrologic Unit Code (HUC12) watershed from the U.S. Geological Survey's Watershed Boundary Dataset (USGS, 2019), the Natural Resources Canada National Hydrographic Network (NHN) Work Units (NHN, 2019), similar to USGS eight-digit HUC watersheds, and stream gage locations from the U.S. Geological Survey (USGS, 2019) and Natural Resources Canada (NHN, 2019).... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alaska, Canada, Geography, Hydrology, Remote Sensing, All tags... USGS Science Data Catalog (SDC), Water Resources, boundaries, geoscientificInformation, inlandWaters, Fewer tags