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We analyzed very-high-resolution imagery to assess status of Metrosideros polymorpha forests across an 83,603 hectare study area that experienced extensive canopy dieback in the 1970s on the eastern side of the island of Hawaii. Using GIS we generated 1170 virtual vegetation plots with a 100 m radius; 541 plots in areas mapped in 1977 with trees dead or mostly defoliated (dieback), and 629 plots in adjacent wet forest habitat, previously mapped as non-dieback condition. In each plot we estimated the percent of M. polymorpha trees dead or mostly defoliated, and percent of trees with healthy crowns. These results were combined with habitat data to produce a spatial model depicting probability of canopy dieback within...
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Several previously published reports and geographic information system (GIS) data layers were used to code information on site attributes for each assessment plot using the spatial join tool in ArcMap. This information was used for an analysis of dieback and non-dieback habitat characteristics. The results of this analysis are presented in this table which depicts the probability of heavy to severe canopy dieback occurring at some time at a particular 30 x 30 m pixel location within the study area.
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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...
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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...
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This data set includes field data for fishes sampled using gill nets and otter trawls during daylight hours in and around Ryer Island, Suisun Bay, California. This data release includes all measured environmental parameters and fish taxa included in the analysis. First posted: April 17, 2019 Revised: August 27, 2019
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This data release comprises a set of environmental sucralose occurrence data in the Sacramento area. Groundwater samples were collected throughout the Sacramento Valley as part of the California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project study in the Sacramento area. These water samples were analyzed for sucralose by chemical derivatization followed by gas chromatography mass spectrometry. The calculated concentrations of sucralose detected in the water samples and the associated quality assurance data are tabulated in this data release. This data release supports the following publications: [Voss et al, in prep]
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The geospatial data presented here as ArcGIS layers denote landcover/landuse classifications to support field sampling efforts that occurred within the Cache Creek Settling Basin (CCSB) from 2010-2017. Manual photointerpretation of a National Agriculture Imagery Program (NAIP) dataset collected in 2012 was used to characterize landcover/landuse categories (hereafter habitat classes). Initially 9 categories were assigned based on vegetation structure (Vegtype1). These were then parsed into two levels of habitat classes that were chosen for their representativeness and use for statistical analyses of field sampling. At the coarsest level (Landcover 1), five habitat classes were assigned: Agriculture, Riparian, Floodplain,...
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The U.S. Geological Survey collected groundwater samples from 49 wells used for domestic and small system drinking water supplies in Amador, Placer, Sutter, and Sacramento counties, California in 2017. The sites were sampled for the Sacramento Metropolitan (SacMetro) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells are commonly screened at shallower depths than public-supply wells. The SacMetro study unit consisted of three “study areas” corresponding to three...
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The U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board and Bureau of Land Management compiled and analyzed data for mapping groundwater salinity in selected oil and gas fields in California. The data for the South Cuyama oil field includes well construction data, digitized borehole geophysical data, geochemical analyses of water samples from oil and gas wells and groundwater wells, geological formation depths, and the groundwater total dissolved solids (TDS) calculations. These data have been compiled from many sources and span several decades. The well construction data includes attributes such as the date drilling began (spud date), borehole orientation, well depth...
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Vegetation and ‘ōhi‘a mortality data collected during the 2016 survey of lower Puna District, Hawai`i. Data were collected at points along rural highways, secondary roads and residential streets where trained observers recorded the vegetation within a 50 m radius using the Jacobi (1989) rapid assessment. This description included tree crown cover, tree height, tree species composition, and ground cover or understory type. In addition, the proportion of dead ‘ōhi‘a was estimated, in 5% intervals, for each quarter of the station starting with the NE quadrant and proceeding counter clockwise.
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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...
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The datasets consist of principal fact information of gravity data and density and magnetic properties of hand samples in the Chico and Willows 1:100,000-scale quadrangles, California.
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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...
Note: This data release is currently being revised and is temporarily unavailable. Field data for vertical water quality profiles using Yellow Spring Instruments (YSI) EXO2 sondes during daylight hours in Clear Lake, California. This data release includes all measured environmental parameters included in the analysis. First release: April 13, 2019 Revised: October 29, 2019 (ver. 2.0) Revised - January 24, 2022 (version 3.0)
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The U.S. Geological Survey, California Volcano Observatory (CalVO) in collaboration with the State of California Governor’s Office of Emergency Services and the California Geological Survey, are working to understand the State’s exposure to volcanic hazards by integrating volcanic hazard information with geospatial data on at-risk populations, infrastructure, and resources. These data are from the geospatial analysis of the assets against volcano hazard zones (near vent, lava flow, lahar, flood, and ash fall) for California volcanoes ranked as Moderate, High, or Very High Threat in the US Geological Survey's 2005 report entitled “Volcanic Threat and Monitoring Capabilities in the United States” available on-line...
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The U.S. Geological Survey collected groundwater samples from 49 wells used for domestic and small system drinking water supplies in Amador, Placer, Sutter, and Sacramento Counties, California in 2017. The wells were sampled for the Sacramento Metropolitan (SacMetro) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells are commonly screened at shallower depths than public-supply wells. The SacMetro study unit consisted of three “study areas” corresponding to three...
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Note: this data release has been deprecated. Please see new data release here: https://doi.org/10.5066/P9KXAMKP. Field data for fishes sampled using bottom and surface gill nets during daylight hours in Clear Lake, California, USA. This data release includes all measured environmental parameters and fish taxa included in the analysis. First posted - December 20, 2018 (available from author) Revised - November 26, 2019 (version 2.0) Revised - January 21, 2022 (version 3.0) Revised - December 7, 2022 (Version 4.0)
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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...
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The U.S. Geological Survey collected groundwater samples from 49 wells used for domestic and small system drinking water supplies in Amador, Placer, Sutter, and Sacramento Counties, California in 2017. The wells were sampled for the Sacramento Metropolitan (SacMetro) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells are commonly screened at shallower depths than public-supply wells. The SacMetro study unit consisted of three “study areas” corresponding to three...
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Hawaiian hoary bats (Lasiurus cinereus semotus) on Hawaii island were surveyed intermittently from 2004–2010. This data release is a single table of resulting bat location estimates, including date, time, coordinates for each location, and presumed bat activity at the time of collection. Nightly movements were documented for 30 Hawaiian hoary bats along the windward (eastern) side of the island of Hawaii. Each bat was fitted with a colored, split ring forearm band (Size X3; A. C. Hughes, Hampton Hill, United Kingdom) for long-term individual recognition and with a radiotransmitter (BD-2C model from Holohil Systems, Carp, Ontario, Canada). Bats were then released at the point of capture. Output from the transmitters...
map background search result map search result map Data release for results of societal exposure to California's volcanic hazards (ver. 3.0, November 2019) Habitat Maps for the Cache Creek Settling Basin, Yolo County, California Groundwater-quality data in the Sacramento Metro shallow aquifer study unit, 2017: Results from the California GAMA Priority Basin Project Groundwater-quality data in the Sacramento Metropolitan shallow aquifer study unit, 2017: Tables Boundaries and Grid Cells of the North American, South American, and Cosumnes Study Areas for the Sacramento Metropolitan Shallow Aquifer Study Unit Geochemical and geophysical data for selected wells in and surrounding the South Cuyama oil and gas field Abundance and Distribution of Clear Lake Hitch in Clear Lake, Lake County, California, 2017-2022 (ver. 4.0, December 2022) Streamflow, Runoff and Baseflow Estimates for Gaged Basins in the Northwest Volcanic Aquifer Study Area, USA, 1904 to 2015 Fishes of Ryer Island, Suisun Bay, California, 2016-2017 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 Table4. Hydrologic disturbance classification used to describe anthropogenic impairments for gaged basins located in the Northwest Volcanic Aquifer Study Area, USA 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 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 Ohia Dieback Study - Hawaii Island Canopy Status Assessment Table, 1977 - 2015 Ohia Dieback Study - Dieback Model Results Table Vegetation and ‘ōhi‘a mortality data collected during the 2016 survey of lower Puna, Hawai`i Gravity and physical property data in the Chico and Willows 1:100,000-scale quadrangles, California Sucralose Concentrations in Groundwater in California's Sacramento Valley Shallow Aquifer System Hawaii Island Hawaiian hoary bat foraging location data 2004-2010 Water Quality Vertical Profiles in Clear Lake, Lake County, California, 2017-2019 (ver. 3.0, January 2022) (Under Revision) Fishes of Ryer Island, Suisun Bay, California, 2016-2017 Habitat Maps for the Cache Creek Settling Basin, Yolo County, California Vegetation and ‘ōhi‘a mortality data collected during the 2016 survey of lower Puna, Hawai`i Abundance and Distribution of Clear Lake Hitch in Clear Lake, Lake County, California, 2017-2022 (ver. 4.0, December 2022) Water Quality Vertical Profiles in Clear Lake, Lake County, California, 2017-2019 (ver. 3.0, January 2022) (Under Revision) Hawaii Island Hawaiian hoary bat foraging location data 2004-2010 Geochemical and geophysical data for selected wells in and surrounding the South Cuyama oil and gas field Groundwater-quality data in the Sacramento Metro shallow aquifer study unit, 2017: Results from the California GAMA Priority Basin Project Groundwater-quality data in the Sacramento Metropolitan shallow aquifer study unit, 2017: Tables Boundaries and Grid Cells of the North American, South American, and Cosumnes Study Areas for the Sacramento Metropolitan Shallow Aquifer Study Unit Sucralose Concentrations in Groundwater in California's Sacramento Valley Shallow Aquifer System Ohia Dieback Study - Hawaii Island Canopy Status Assessment Table, 1977 - 2015 Ohia Dieback Study - Dieback Model Results Table Gravity and physical property data in the Chico and Willows 1:100,000-scale quadrangles, California Streamflow, Runoff and Baseflow Estimates for Gaged Basins in the Northwest Volcanic Aquifer Study Area, USA, 1904 to 2015 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 Table4. Hydrologic disturbance classification used to describe anthropogenic impairments for gaged basins located in the Northwest Volcanic Aquifer Study Area, USA 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 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 Data release for results of societal exposure to California's volcanic hazards (ver. 3.0, November 2019)