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Table 1. Station descriptions for 312 continuous-record streamflow gages, used to estimate runoff and baseflow using six hydrograph-separation methods, in the Northwest Volcanic Aquifer Study Area, USA The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) (https://water.usgs.gov/ogw/gwrp/activities/regional.html) supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study Area (NVASA), estimates of runoff and baseflow were determined for 312 streamflow-gaging stations from 1904 to 2015. Gages with complete water years (October to September) of continuous-streamflow record were used to partition streamflow into runoff and baseflow, which is that part of streamflow attributed to groundwater discharge. For each water year annual estimates of baseflow, runoff, and a base-flow... Categories: Data; Tags: California, GWToolbox, Idaho, NVASA, NVASA, All tags... Oregon, USGS Water Availability and Use Study Program, baseflow, hydrograph separation, inlandWaters, runoff, volcanic aquifers, Fewer tags 1992 digital surface model Malakoff Diggins State Historic Park, California One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive terrain. This data release includes a 1992 digital surface model (DSM), 1992 orthophoto mosaic, masked orthophoto of the study area, 1992 ground cover classification, and 1992 pruned DSM with the vegetation bias removed. Stereo-photogrammetry was used to create a 1992 digital surface model (DSM) and orthophoto mosaic from archived aerial photographs.... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Humbug Creek, Malakoff Diggins State Historic Park, aerial photography, digital elevation models, elevation, All tags... erosion, orthomosaic, photogrammetry, placer mine, remote sensing, sedimentation, Fewer tags Study Area Boundary Malakoff DIggins State Historic Park, California One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive terrain. This data release includes a 2014 digital elevation model (DEM), a study area boundary, and a geomorphic map. The 2014 DEM was derived from an available aerial LiDAR dataset collected in 2014 by the California Department of Conservation. The geomorphic map was derived for the study area from using a multi-scale spatial analysis. A topographic... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Humbug Creek, Malakoff Diggins State Historic Park, digital elevation models, elevation, erosion, All tags... placer mine, sedimentation, Fewer tags Table4. Hydrologic disturbance classification used to describe anthropogenic impairments for gaged basins located in the Northwest Volcanic Aquifer Study Area, USA The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) (https://water.usgs.gov/ogw/gwrp/activities/regional.html) supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study Area (NVASA), estimates of runoff and baseflow were determined for 312 streamflow-gaging stations from 1904 to 2015. Gages with complete water years (October to September) of continuous-streamflow record were used to partition streamflow into runoff and baseflow, which is that part of streamflow attributed to groundwater discharge. For each water year annual estimates of baseflow, runoff, and a base-flow... Categories: Data; Tags: California, GWToolbox, Idaho, NVASA, NVASA, All tags... Oregon, USGS Water Availability and Use Study Program, baseflow, hydrograph separation, inlandWaters, runoff, volcanic aquifers, Fewer tags Geomorphic Map Malakoff Diggins State Historic Park, California One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive terrain. This data release includes a 2014 digital elevation model (DEM), a study area boundary, and a geomorphic map. The 2014 DEM was derived from an available aerial LiDAR dataset collected in 2014 by the California Department of Conservation. The geomorphic map was derived for the study area from using a multi-scale spatial analysis. A topographic... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Humbug Creek, Malakoff Diggins State Historic Park, digital elevation models, elevation, erosion, All tags... geomorphology, placer mine, remote sensing, sedimentation, Fewer tags Sediment grain-size data from the Klamath estuary, California This data release supersedes version 1.0, published in November 2021 at https://doi.org/10.5066/P9CAZIHJ. Versioning details are documented in the accompanying Klamath_Grainsize_VersionHistory.txt file. This data release includes grain-size measurements of sediment samples collected from the substrate surface and uppermost 10 cm of sediment deposits in the Klamath estuary, northern California. Samples were collected using a BMH-60 bed-material sampler deployed from a boat, or by hand trowel from subaerial or shallow-water (less than 0.5 m water depth) regions along the estuary margins and side channels. Sediment grain size was analyzed at the U.S. Geological Survey (USGS) laboratory in Santa Cruz, Calif. Particles... Categories: Data; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Del Norte County, Distributions, Geomorphology, All tags... Klamath basin, PCMSC, Pacific Coastal and Marine Science Center, Sedimentology, State of California, U.S. Geological Survey, USGS, environment, estuary, field sampling, geoscientificInformation, grain size, grain-size analysis, land surface characteristics, sediment, sediment grain size, Fewer tags 2014 DEM Malakoff Diggins State Historic Park, California One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive terrain. This data release includes a 2014 digital elevation model (DEM), a study area boundary, and a geomorphic map. The 2014 DEM was derived from an available aerial LiDAR dataset collected in 2014 by the California Department of Conservation. The geomorphic map was derived for the study area from using a multi-scale spatial analysis. A topographic... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Humbug Creek, Malakoff Diggins State Historic Park, digital elevation models, elevation, erosion, All tags... placer mine, remote sensing, sedimentation, Fewer tags 1992 digital surface model and orthomosaic of Malakoff Diggins State Historic Park, California One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive terrain. This data release includes a 1992 digital surface model (DSM), 1992 orthophoto mosaic, masked orthophoto of the study area, 1992 ground cover classification, and 1992 pruned DSM with the vegetation bias removed. Stereo-photogrammetry was used to create a 1992 digital surface model (DSM) and orthophoto mosaic from archived 1992 aerial photographs.... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Raster; Tags: Geomorphology, Malakoff Diggins State Historic Park, Raster digital surface models, USGS Science Data Catalog (SDC), erosion, All tags... hydraulic mine, orthophoto, photogrammetry, Fewer tags Polygon locations and contributing area for 312 gaged basins, used to estimate runoff and baseflow using six hydrograph-separation methods, in the Northwest Volcanic Aquifer Study Area, USA The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) (https://water.usgs.gov/ogw/gwrp/activities/regional.html) supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study Area (NVASA), estimates of runoff and baseflow were determined for 312 streamflow-gaging stations from 1904 to 2015. Gages with complete water years (October to September) of continuous-streamflow record were used to partition streamflow into runoff and baseflow, which is that part of streamflow attributed to groundwater discharge. For each water year annual estimates of baseflow, runoff, and a base-flow... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, GWToolbox, Idaho, NVASA, NVASA, All tags... Oregon, USGS Water Availability and Use Study Program, baseflow, hydrograph separation, inlandWaters, runoff, volcanic aquifers, Fewer tags Surface deposition and elevation change in five salt marshes, Humboldt Bay, CA, 2014-2019 Elevation change and surface deposition are important drivers of salt marsh ecological processes and represent two of the fundamental variables for determining marsh resilience to sea-level rise. Surface Elevation Tables with Marker Horizons (SET-MH) were used to measure plot-scale elevation change (SETs) and surface deposition (MHs) in five USGS study marshes located in Humboldt Bay, CA. SET-MHs were installed in 2014 (Mad River marsh and Manila marsh) and in 2015 (Jacoby marsh, White marsh, and Hookton marsh) and were measured during quarterly site visits. The SET-MH network includes two SETs and six MHs in each of the five study marshes. Measuring elevation change at the two SETs in each study marsh involves... Categories: Data; Tags: California, Hookton marsh, Humboldt Bay, Humboldt County, Jacoby marsh, All tags... Mad River marsh, Manila marsh, SET MH, White marsh, accretion, biota, estuarine processes, marsh ecosystems, salt marsh, surface deposition, Fewer tags Point locations of 312 continuous-record streamflow gages, used to estimate runoff and baseflow using six hydrograph-separation methods, in the Northwest Volcanic Aquifer Study Area, USA The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) (https://water.usgs.gov/ogw/gwrp/activities/regional.html) supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study Area (NVASA), estimates of runoff and baseflow were determined for 312 streamflow-gaging stations from 1904 to 2015. Gages with complete water years (October to September) of continuous-streamflow record were used to partition streamflow into runoff and baseflow, which is that part of streamflow attributed to groundwater discharge. For each water year annual estimates of baseflow, runoff, and a base-flow... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, GWToolbox, Idaho, NVASA, NVASA, All tags... Oregon, USGS Water Availability and Use Study Program, baseflow, hydrograph separation, inlandWaters, runoff, volcanic aquifers, Fewer tags Water level and barometric pressure measurements in two salt marshes, Humboldt Bay, CA, 2016-2019 Water levels are an important driver of salt marsh processes. In 2016, pressure-transducing data loggers (LT Edge Model 3001, Solinst and Hobo Model U-20-001-01-Ti) and barometric-pressure loggers (Model 3001, Solinst) were deployed in two USGS study marshes (Mad River marsh and Hookton marsh) located in Humboldt Bay, CA. The loggers were placed as low in the tide frame as possible, while still maintaining access to the sensors at low tide. Sensors captured high tide water levels; but sensor elevation was too high to capture low tide water levels. Continuous measurements were collected on a 6-minute timestep. Sensor elevations were surveyed using Real-Time Kinematic GPS (Leica GS-15, Leica Geosystems, Norcross,... Categories: Data; Tags: California, Hookton marsh, Humboldt Bay, Humboldt County, Mad River marsh, All tags... Manila marsh, White marsh, biota, estuarine processes, inundation, marsh ecosystems, salt marsh, water level, Fewer tags Baseline High Resolution Land Cover Map for the Mainstem Klamath River Corridor Downstream of Iron Gate Dam, Klamath River, CA, 2018 This data release includes a file geodatabase with land cover maps for a 313-kilometer segment along the mainstem Klamath River corridor downstream from Iron Gate Dam, CA. The maps were derived from high-resolution (15cm) imagery and topobathymetric elevation data, collected by NV5 Geospatial (formerly QSI, Inc) and published on Open Topography (https://doi.org/10.5069/G9DN436N). Acquisition dates spanned 06/01/2018 to 06/14/2018. The area of interest was discretized into three zones and land cover maps were generated using geoprocessing tools, implemented in ArcMap 10.8.1, and image classification tools, implemented in Ecognition 10.2. The maps include six land cover classes: 1) trees, 2) shrubs, 3) grass, 4) bare... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Canopy Height Model, Dam Removal, Geomorphology, Hydrology, All tags... Image Segmentation, Klamath River, Remote Sensing, USGS Science Data Catalog (SDC), Vegetation Map, biota, Fewer tags Geochemical, mineralogical, and grain-size data for in-situ solid materials and suspended sediment at Malakoff Diggins State Historic Park, Nevada County, California This dataset includes data for in-situ solid materials and suspended sediments from surface-water samples, as well as surface-water chemistry from samples collected during storm events at Malakoff Diggins State Historic Park, Nevada County, California. In-situ solid samples were collected during 2015 along six vertical transects along the cliff walls of the mine pit. Surface-water samples were collected during 2014 and 2016 from Hiller Tunnel and from drainage networks below the in-situ sampling sites during runoff conditions. In-situ and suspended-sediment samples were analyzed for grain-size distribution, X-ray diffraction (XRD) for quantitative mineralogy, inductively coupled plasma - mass spectrometry (ICP-MS)... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ancestral Yuba River, California, Humbug Creek drainage, Malakoff Diggins State Historic Park, Nevada County, All tags... Sierra Nevada Mountains, USGS Science Data Catalog (SDC), Yuba River watershed, clay minerals, erosion, geochemistry, gold mining, grain-size distribution, hydraulic mining, legacy mining effects, mineralogy, sediment transport, suspended material (water), Fewer tags Table 2. Annual streamflow, runoff and baseflow, estimated for the period of record using six hydrograph-separation methods, for 312 gaged basins in the Northwest Volcanic Aquifer Study Area, USA, 1904-2015 The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) (https://water.usgs.gov/ogw/gwrp/activities/regional.html) supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study Area (NVASA), estimates of runoff and baseflow were determined for 312 streamflow-gaging stations from 1904 to 2015. Gages with complete water years (October to September) of continuous-streamflow record were used to partition streamflow into runoff and baseflow, which is that part of streamflow attributed to groundwater discharge. For each water year annual estimates of baseflow, runoff, and a base-flow... Categories: Data; Tags: California, GWToolbox, Idaho, NVASA, NVASA, All tags... Oregon, USGS Water Availability and Use Study Program, baseflow, hydrograph separation, inlandWaters, runoff, volcanic aquifers, Fewer tags Carbon storage in the edge environments of five salt marshes, Humboldt Bay, CA, 2018 Blue carbon storage in coastal vegetated habitats is an important component of the global carbon cycle. In 2018, shallow sediment cores were collected in five USGS study marshes located in Humboldt Bay, CA. The cores were collected within 2 m of the marsh edge to characterize carbon storage in areas susceptible to marsh edge erosion Two sediment cores were collected in each of the five study marshes (Mad River, Manila, Jacoby, White, Hookton) using an Ejkelkamp peat sampler (52 mm diameter). The sampler was pounded in the sediments with a heavy plastic mallet. This method produces little to no compaction because once inserted, the corer is rotated 180°, and a sample is collected adjacent to where it was driven into... Categories: Data; Tags: California, Hookton marsh, Humboldt Bay, Humboldt County, Jacoby marsh, All tags... Mad River marsh, Manila marsh, White marsh, biota, blue carbon, bulk density, carbon storage, estuarine processes, marsh ecosystems, salt marsh, Fewer tags Database of Geomorphic Features, Trinity River California, 1980–2011 The USGS in cooperation with the Trinity River Restoration Program, a multi-agency group tasked with implementing federally mandated restoration, completed a geomorphic change assessment to inform the planning process for future restoration work. The ARCMAP geodatabase (v.10.0) contains geomorphic features digitized from six rectified orthophotographs (1980, 1997, 2001, 2006, 2009, and 2011). The structure of the geodatabase and methods used to delineate individual geomorphic features are described in Curtis, J.A., and Guerrero, T.M., 2015, Geomorphic mapping to support river restoration on the Trinity River downstream from Lewiston Dam, California, 1980–2011: U.S. Geological Survey Open-File Report 2015-5046.... Categories: Data, pre-SM502.8 1992 pruned digital surface model Malakoff Diggins State Historic Park, California One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive terrain. This data release includes a 1992 digital surface model (DSM), 1992 orthophoto mosaic, masked orthophoto of the study area, 1992 ground cover classification, and 1992 pruned DSM with the vegetation bias removed. Stereo-photogrammetry was used to create a 1992 digital surface model (DSM) and orthophoto mosaic from archived aerial photographs.... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Humbug Creek, Malakoff Diggins State Historic Park, aerial photography, digital elevation models, elevation, All tags... erosion, orthomosaic, photogrammetry, placer mine, remote sensing, sedimentation, Fewer tags 1992 orthophoto mosaic Malakoff Diggins State Historic Park, California One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive terrain. This data release includes a 1992 digital surface model (DSM), 1992 orthophoto mosaic, masked orthophoto of the study area, 1992 ground cover classification, and 1992 pruned DSM with the vegetation bias removed. Stereo-photogrammetry was used to create a 1992 digital surface model (DSM) and orthophoto mosaic from archived aerial photographs.... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Humbug Creek, Malakoff Diggins State Historic Park, aerial photography, digital elevation models, elevation, All tags... erosion, orthomosaic, photogrammetry, placer mine, remote sensing, sedimentation, Fewer tags Table3. Average-annual streamflow, runoff and baseflow, estimated for the period of record using six hydrograph-separation methods, for 312 gaged basins in the Northwestern Volcanic Aquifer Study Area, USA, 1904-2015 The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) (https://water.usgs.gov/ogw/gwrp/activities/regional.html) supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study Area (NVASA), estimates of runoff and baseflow were determined for 312 streamflow-gaging stations from 1904 to 2015. Gages with complete water years (October to September) of continuous-streamflow record were used to partition streamflow into runoff and baseflow, which is that part of streamflow attributed to groundwater discharge. For each water year annual estimates of baseflow, runoff, and a base-flow... Categories: Data; Tags: California, GWToolbox, Idaho, NVASA, NVASA, All tags... Oregon, USGS Water Availability and Use Study Program, baseflow, hydrograph separation, inlandWaters, runoff, volcanic aquifers, Fewer tags 1 2 »