519 Works

Summer Mean Enhanced Vegetation Index for the Diamond Valley Flow System Groundwater Discharge Area, Central Nevada, 2010

Susan G. Buto & Amanda Garcia
This dataset represents the mean Enhanced Vegetation Index (EVI) of two Landsat 5 Thematic Mapper scenes from the summer of 2010 in the Diamond Valley Flow System, central Nevada. The data were used to evaluate and estimate groundwater discharge by evapotranspiration by relating the mean of EVI calculated from July 24 and August 25, 2010 Landsat scenes to evapotranspiration measured at 4 eddy-covariance sites located in phreatophytic vegetation of varying types and densities in Kobeh...

Groundwater Discharge Area for the Diamond Valley Flow System, Central Nevada

This dataset represents the groundwater discharge area in the Diamond Valley Flow System, central Nevada. Vegetated areas within the groundwater discharge area are composed of phreatophytic shrubs with smaller areas of grassland, marshland, xeric vegetation, bare soil, and agricultural lands where phreatophytic shrubs historically were present. Vegetated areas outside the groundwater discharge area are primarily composed of xeric vegetation and bare soil although very sparse phreatophytic shrubs may be present on the outer margins of...

Water Level Altitude Contours for the Diamond Valley Flow System, Central Nevada, 2012

This dataset represents 2012 water levels in the Diamond Valley Flow System, central Nevada. Water level contours were developed using data from wells primarily measured in 2012 although earlier water level data in select wells were used in cases where no new data were available and water levels were not expected to have changed over time.

Concentration of total and dissolved forms of phosphorus and nitrogen from the control and test catchment during the calibration and treatment phase in Madison, WI (2013 - 2015)

W.R. Selbig
This dataset describes the storm event mean concentrations and loads of total and dissolved forms of phosphorus and nitrogen from paired samples collected in the control and test catchment during the calibration and treatment phase of a leaf removal study in Madison, Wisconsin, USA. Samples were collected in spring 2013 through fall 2015 and are parsed by season where spring represents April May, summer represents June September and fall represents October November. Measured weather parameters...

Data for Decadal shifts in grass and woody plant cover are driven by prolonged drying and modified by topo-edaphic properties

Seth M. Munson, Temuulen Tsagaan Sankey, George Z. Xian, Miguel Villareal & Collin Horner
Woody plant encroachment and overall declines in perennial vegetation in dryland regions can alter ecosystem properties and indicate land degradation, but the causes of these shifts remain controversial. Determining how changes in the abundance and distribution of grass and woody plants are influenced by conditions that regulate water availability at a regional scale provides a baseline to which compare how management actions alter the composition of these vegetation types at a more local scale and...

Water level data from select wetlands at Saint Marks National Wildlife Refuge:2010 - 2015

Jeffrey W. Riley & Daniel L. Calhoun
Small, seasonal pools and temporary ponds (<4.0 ha) are the most numerous and biologically diverse wetlands in many natural landscapes. Thus, accurate determination of their numbers and spatial characteristics is beneficial for conservation, management, and persistence of biodiversity associated with these freshwater systems. We examined the utility of a topographic position index (TPI) landscape classification as a means to identify and classify depressional wetlands. We also assessed relationships between topographic characteristics and hydroperiod of known...

Rhodamine WT dye concentrations measured at fixed locations in the Des Plaines River near Brandon Road Lock and Dam near Rockdale, Illinois (October 20-21,2015)

P Ryan Jackson
Five Turner Designs C3 submersible fluorometers were deployed in the Des Plaines River downstream of the Brandon Road Lock and Dam (BRLD) near Rockdale, IL, to measure Rhodamine WT dye concentrations during a U.S. Geological Survey dye study conducted on October 20-21, 2015. The lock chamber at BRLD was dyed with 4 liters of Rhodamine WT dye during a routine filling procedure. Measurements of dye concentration downstream collected by these instruments capture the leakage of...

Mean of the Top Ten Percent of NDVI Values in the Yuma Proving Ground during Monsoon Season, 1986-2011

Amy N. Birtwistle, Melinda J. Laituri, Brian P. Bledsoe & Jonathan M. Friedman
This study uses growth in vegetation during the monsoon season measured from LANDSAT imagery as a proxy for measured rainfall. NDVI values from 26 years of pre- and post-monsoon season Landsat imagery were derived across Yuma Proving Ground (YPG) in southwestern Arizona, USA. The LANDSAT imagery (1986-2011) was downloaded from USGSs GlobeVis website (http://glovis.usgs.gov/). Change in NDVI was calculated within a set of 2,843 Riparian Area Polygons (RAPs) up to 1 km in length defined...

Velocity profiling in the Chicago Sanitary and Ship Canal near the US Army Corps of Engineers Electric Dispersal Barrier near Romeoville, Illinois

James J Duncker
On August 31, 2015, USGS Illinois Water Science Center staff deployed a 2000 kHz side-looking acoustic Doppler velocity meter (ADVM) in the Chicago Sanitary and Ship Canal (CSSC) at the Electric Dispersal Barrier System (EDBS). These data were collected as a fully loaded commercial barge tow traversed the EDBS and passed the ADVM three times, and as several smaller vessels and an unloaded barge tow passed the ADVM. The ADVM was mounted to a rigid...

Alaska Digitize Project

Nadine E. Golden, Jane A. Reid & Erik Lowe
Processing methodology for the seafloor substrate data required multiple steps to georegister, digitize, clean, and validate the datasets. Sediments such as gravel, sand, and mud were available as verbal notations on the smooth sheets and the data on any one smooth sheet were digitized by one person and then proofed by another. Once the locations of the sediment point data were collected and notations were quality controlled, the sediment data were then converted to numerical...

MODFLOW-NWT: a Newton Formulation for MODFLOW-2005

R.G. Niswonger, Sorab Panday & Motomu Ibaraki
The USGS MODFLOW-NWT is a Newton-Raphson formulation for MODFLOW-2005 to improve solution of unconfined groundwater-flow problems. MODFLOW-NWT is a standalone program that is intended for solving problems involving drying and rewetting nonlinearities of the unconfined groundwater-flow equation.

Geospatial database of the study boundary, sampled sites, watersheds, and riparian zones developed for Midwest Stream Quality Assessment

Naomi Nakagaki, Sharon L. Qi, Jeffrey W. Frey, Daniel T. Button & Thomas E. Burley
The Midwest Stream Quality Assessment is the first of several regional studies that are being conducted as part of the Regional Stream Quality Assessment (RSQA) project, a component of the Cycle 3 National Water Quality Assessment (NAWQA) project. The MSQA was a collaborative study amongst NAWQA, the USGS Columbia Environmental Research Center (CERC), and the USEPA National Rivers and Streams Assessment (NRSA). The objective of the MSQA study was to characterize water-quality stressors - contaminants,...

Groundwater Toolbox: A graphical and mapping interface for analysis of hydrologic data

Tong Zhai, Paul M. Barlow, William L. Cunningham & Mark Gray
The Groundwater Toolbox is a graphical and mapping interface for analysis of hydrologic data. The software is a customized interface built on the non-proprietary, open-source MapWindow geographic information system software in a Microsoft Windows computing environment. The Groundwater Toolbox allows for the retrieval of hydrologic time-series data (streamflow, groundwater levels, and precipitation) from the USGS National Water Information System; preprocessed meteorological data from the National Oceanic and Atmospheric Administration National Climatic Data Center also are...

Gulf Watch Alaska Nearshore Component: Marine Water Quality, Water Temperature from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park, 2006-2014

B.E. Ballachey
This data is part of the GulfWatch Alaska (GWA) long term monitoring program, benthic monitoring component. The data consists of date, time, and temperature measurements from intertidal rocky sampling sites. The site name is part of the file name. The dataset is several comma separated files exported from a download from the HOBO temperature logger. Sites are in Alaska and include locations in Katmai National Park and Preserve, Kenai Fjords National Park and eastern, northern,...

MODFLOW and MODFLOW Conduit Flow Process simulation experiments of the Woodville Karst Plain, near Tallahassee, Florida with three different approaches and different stress periods

Eve Kuniansky
This Data Release has 18 different groundwater flow simulation applications for the Woodville Karst Plain area near Tallahassee Florida with three variations of distributed parameter model approach. The site model files provided include both calibrated and uncalibrated simulations of various steady-state and transient hydrologic conditions. Simulations were accomplished with equivalent porous media models that allow laminar flow only (MODFLOW) or laminar and non-laminar flow in a model layer (MODFLOW-CFP mode 2) and hybrid model simulations...

Three-dimensional point measurements of basic water-quality parameters in Hoover Reservoir near Westerville, Ohio, August 25 and 27, 2015

To better understand the hydrodynamics and water-quality distributions of the lower portion of Hoover Reservoir near Westerville, Ohio, in response to selective withdrawal operations at the dam, the U.S. Geological Survey (USGS) conducted two sets of synoptic surveys of water-quality and velocity in August 2015. On August 25, 2015, the middle intake gates were operational at the dam, while on August 27, 2015, the lower intake gates were operational. These water-quality data were collected with...

USMIN Mineral Resource Data for the U.S. Geological Survey Sagebrush Mineral Resource Assessment Project

G.L. Fernette
The point and polygon layers within this geodatabase represent locations of mineral occurrences, mines, mining and mineral districts and sites of active mineral exploration within or near the Department of the Interior (DOI) Sagebrush Focal Areas in Montana, Wyoming and Utah, central Idaho, and the Oregon-Nevada-Idaho border area. The data were compiled by the U.S. Geological Survey (USGS) Mineral Deposit Database project (USMIN) to provide mineral resource information for use in the USGS Sagebrush Mineral...

Development of a Coastal Drought Index Using Salinity Data

Paul A. Conrads & Lisa S. Darby
A critical aspects of the uniqueness of coastal drought is the effects on salinity dynamics of creeks and rivers. The location of the freshwater-saltwater interface along the coast is an important factor in the ecological and socio-economic dynamics of coastal communities. Salinity is a critical response variable that integrates hydrologic and coastal dynamics including streamflow, precipitation, sea level, tidal cycles, winds, and tropical storms. The position of the interface determines the composition of freshwater and...

Sediment core data from the northern flank of Monterey Canyon, offshore California

Katherine L. Maier, Charles K. Paull, Mary McGann, Eve M. Lundsten, Krystle Anderson, Roberto Gwiazda & Daniel S. Brothers
The five files included in this U.S. Geological Survey data release are data from a set of sediment cores acquired from the continental slope, north of Monterey Canyon, offshore central California. Vibracores and push cores were collected with the Monterey Bay Aquarium Research Institutes remotely operated vehicle (ROV) Doc Ricketts in 2014 (cruise ID 2014-615-FA; http://cmgds.marine.usgs.gov/fan_info.php?fan=2014-615-FA). One spreadsheet (NorthernFlankMontereyCanyonCores_Info.xlsx) contains core name, location, and length. One spreadsheet (NorthernFlankMontereyCanyonCores_MSCLdata.xlsx) contains Multi-Sensor Core Logger P-wave velocity and...

Time Series Electromagnetic Induction-Log Datasets Collected through the 2014 Water Year in South Florida

Scott T. Prinos & Robert Valderrama
Time series electromagnetic-induction log (TSEMIL) datasets are collected from PVC cased or uncased monitoring wells to evaluate changes in water conductivity over time. TSEMIL datasets consist of a series of individual electromagnetic-induction logs collected at a frequency of months or years that have been compiled into a dataset by eliminating small uniform offsets in bulk conductivity between logs likely caused by minor variations in calibration. These offsets are removed by selecting a depth at which...

Angel Lichen Moth Abundance and Morphology Data, Grand Canyon, AZ, 2012

Anya Metcalfe, Ted Kennedy & Jeff Muehlbauer
Two unique datasets on the abundance and morphology of the angel lichen moth (Cisthene angelus) in Grand Canyon, Arizona, USA were compiled to describe the phenology and life history of this common, but poorly known, species. The abundance data were collected from 2012 to 2013 through a collaboration with river runners in Grand Canyon National Park. These citizen scientists deployed light traps from their campsites for one hour each night of their expedition. Insects were...

Gravity Change from 2014 to 2015, Sierra Vista Subwatershed, Upper San Pedro Basin, Arizona

Jeffrey R. Kennedy
Relative-gravity data and absolute-gravity data were collected in the Sierra Vista Subwatershed, Upper San Pedro Basin, Arizona, in May-June 2014 and 2015. Data from 2014 and a description of the survey network were published in USGS Open File Report 2015-1086. Data presented in the shapefile here are: 1) Network-adjusted values from 2015, 2) Gravity change from 2014 to 2015, and 3) Survey-grade coordinates obtained from a Global Positioning System (GPS) survey in 2015. 2015 data...

ATRIS Seafloor Images ? Crocker Reef, Florida, 2014

David G Zawada, Philip Thompson, Jessica Resnick & Lance Thornton
Underwater digital images, single-beam bathymetry, and global positioning system (GPS) data were collected June 24-25, 2014 within a 1-km x 1-km area around Crocker Reef in the Florida Keys, USA. A total of 91,206 images of the seafloor and water column were collected along pre-defined transect lines and organized into 3 sets: track1, track2, and track3. This data release contains a subset of those images (25,485 images), all of which were used for benthic habitat...

Compaction of Subsurface Sediments in the Chicot and Evangeline Aquifers in the Houston-Galveston Region, Texas

Jason K. Ramage
The U.S. Geological Survey in cooperation with the Harrisā€Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District has produced this dataset of compaction values in the Chicot and Evangeline aquifers in the Houstonā€Galveston region, Texas. This dataset shows compaction values of subsurface sediments (mostly in the fine-grained silt and clay layers because little compaction occurs in sand layers) in the Chicot and Evangeline aquifers was recorded continuously by...

Coastal Topography?Fire Island, New York, 07 May 2012

Lidar-derived bare-earth topography Digital Elevation Model (DEM) mosaic and classified point-cloud datasets for Fire Island, New York, were produced from remotely sensed, geographically referenced elevation measurements collected on May 7, 2012.

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