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Filters Date Range Past year (2) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Water Resources Jennifer B Sharpe Tyler D. Johnson New England Water Science Center California Water Science Center More... Categories Data Release - Revised (1) Tag Types Theme (3) Place (3) Harvest Set (3) Label (1) Tag Schemes USGS Thesaurus (2) ISO 19115 Topic Category (2) None (1) Geographic Names Information System (2) Geographic Names Information System (GNIS) (1) View Results as: JSON ATOM CSV

National Multi Order Hydrologic Position (MOHP - High Resolution) Predictor Data for Groundwater and Groundwater-Quality Modeling Multi Order Hydrologic Position (MOHP) raster datasets: Distance from Stream to Divide (DSD) and Lateral Position (LP) have been produced nationally for the 48 contiguous United States at a 30-meter resolution for stream orders 1 through 9. These data are available for testing as predictor variables for various regional and national groundwater-flow and groundwater-quality statistical models. The concept behind MOHP is that for any given point on the earth’s surface there is the potential for longer and longer groundwater flow paths as one goes deeper and deeper beneath the land surface. These increasing depths correspond to increasing stream orders. Or in other words, with increasing depth these paths of groundwater... Tags: Canada, Cycle 3, Groundwater, Hydrologic Position, Mexico, All tags... NAWQA, NSDI, National Rasters, Statistical Predictors, USGS Science Data Catalog (SDC), United States, Water Quality, environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags DS796 California Groundwater Units These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. The California Groundwater Units dataset classifies and delineates the State into one of three groundwater based polygon units: (1) those areas defined as alluvial groundwater basins or sub-basins (DWR, 2002), (2) highland areas that are adjacent to and topographically upgradient of groundwater basins, and (3) highland areas not associated with any groundwater basin. In total, 938 Groundwater Units are represented. The Groundwater... Tags: California, GAMA, Groundwater, Groundwater Ambient Monitoring Assessment Program, Groundwater basin, All tags... Highland areas, NSDI, USGS Science Data Catalog (SDC), United States, Western United States, environment, geoscientificInformation, inlandWaters, Fewer tags Data Release for Secondary Hydrogeologic Regions of the Conterminous United States (ver. 2.0, June 2022) The U.S. Geological Survey (USGS) previously identified 62 Principal Aquifers (PAs) in the U.S., with 57 located in the conterminous states. The USGS characterized areas outside of PAs as “other rocks;” other rocks account for about 40% of the area of the conterminous states. This paper subdivides the large area identified as other rocks into Secondary Hydrogeologic Regions (SHRs). SHRs are defined as areas of other rock within which the rocks are of comparable geologic age, lithology, and relationship to the presence or absence of underling PAs or overlying glacial deposits. A total of 69 SHRs were identified. SHRs were identified in two phases. In the first phase, Other Rock Regions (ORRs) were defined as regions... Categories: Data Release - Revised; Tags: Aquifers, Classification, Confining Layers, Groundwater, Hydrogeology, All tags... NAWQA, National Water Quality Program, Regional-scale, USGS Science Data Catalog (SDC), United States, Water quality, cycle 3, Fewer tags