Data Releases
The data collected and the techniques used by USGS scientists should conform to or reference national and international standards and protocols if they exist and when they are relevant and appropriate. For datasets of a given type, and if national or international metadata standards exist, the data are indexed with metadata that facilitates access and integration.
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Geologic map database of the Bison Range and vicinity, northwestern Montana Geologic map database of the Bison Range and vicinity, northwestern Montana
This data release provides Geologic Map Schema (GeMS)-compliant GIS data for new geologic mapping of the Bison Range and surrounding area on the Flathead Reservation, northwestern Montana. The database represents the geology for the 150 square kilometer, geologically complex map area, at a publication scale of 1:24,000. The map covers parts of Sanders and Lake Counties, Montana. All...
Hawai‘i Volcanoes National Park, Barcoding of Ambrosia Beetles and Wood-boring Lepidoptera Larva, 2021-2023 Hawai‘i Volcanoes National Park, Barcoding of Ambrosia Beetles and Wood-boring Lepidoptera Larva, 2021-2023
Ambrosia beetles (Coleoptera: Curculionidae) have been implicated in the spread of Ceratocystis fungi that cause rapid ‘ōhiʻa death (ROD), a deadly fungal disease threatening the keystone Hawaiian tree ʻōhiʻa lehua (Metrosideros polymorpha). Research has investigated the role that ambrosia beetles play in the spread of the disease, including studies within Hawaiʻi Volcanoes National Park...
Model Archive Summary for Turbidity Derived Suspended-Sediment Concentration at 14179000 Breitenbush River above French Creek near Detroit, Oregon Model Archive Summary for Turbidity Derived Suspended-Sediment Concentration at 14179000 Breitenbush River above French Creek near Detroit, Oregon
This document describes a new equation for estimating suspended-sediment concentration (SSC) at a fixed point from turbidity values at continuous 15-minute intervals and daily suspended sediment load at USGS site Breitenbush River above French Creek near Detroit, Oregon. The methods described follow USGS guidance as referenced in USGS Techniques and Methods, Book 3, Chap. C2 (Edwards and...
Data release for Effects of Total Suspended Solids on Photomineralization of Dissolved Organic Matter in the Peace-Athabasca Delta, Canada Data release for Effects of Total Suspended Solids on Photomineralization of Dissolved Organic Matter in the Peace-Athabasca Delta, Canada
Northern deltas receive chromophoric dissolved organic matter (CDOM) from their watersheds, which can be oxidized to carbon dioxide upon absorption of sunlight (i.e., photomineralized). These deltas also receive total suspended solids (TSS), which may shade sunlight absorption by CDOM, thus limiting photomineralization. To quantify this interaction for the first time, we measured
Forest biomass projections under alternative management and hydrological scenarios in the Reno Bottoms area of the Upper Mississippi River floodplain Forest biomass projections under alternative management and hydrological scenarios in the Reno Bottoms area of the Upper Mississippi River floodplain
Floodplain forests are being transformed by multiple pressures, prompting widespread management and restoration efforts. It is uncertain how disturbances, including hydrologic change, and management actions will interact to influence the ecology of these threatened forests. Here, we present the results of a forest landscape model in support of an ecological study detailed in the...
USGS National and Global Oil and Gas Assessment Project—North Cuba Area: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables USGS National and Global Oil and Gas Assessment Project—North Cuba Area: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables
This data release contains the boundaries of assessment units, assessment input data, and resulting fact sheet data tables for the assessment of undiscovered oil and gas resources in the North Cuba area. The assessment unit is the fundamental unit used in the National and Global Oil and Gas Assessment Project for the assessment of undiscovered oil and gas resources. The assessment unit...
Spatial distribution of native freshwater mussels across six reaches of the upper Mississippi River, 2006-2019 Spatial distribution of native freshwater mussels across six reaches of the upper Mississippi River, 2006-2019
We conducted large-scale systematic surveys for native mussels across six reaches of the upper Mississippi River. In each reach, divers placed two 0.25 square meter quadrat frames on the river bottom. The duplicate quadrats, which were placed 10 m apart in an upstream to downstream direction, were used to increase the area sampled at each site and increase the effectiveness of this...
Simulation of Groundwater Flow in the Long Island, New York Regional Aquifer System for 2010 Daily Recharge Conditions Simulation of Groundwater Flow in the Long Island, New York Regional Aquifer System for 2010 Daily Recharge Conditions
This model archive documents a transient groundwater-flow model that simulates hydrologic conditions in the Long Island aquifer system for the year 2010, using the U.S. Geological Survey groundwater modeling software MODFLOW 6 (Langevin and others, 2017). The groundwater model is a derivative of the conditioned model documented in Jahn and others (2024), and described in Walter and...
Sediment Data From Surface Samples and Sand Augers Collected in 2023 From the Northern Chandeleur Islands, Louisiana Sediment Data From Surface Samples and Sand Augers Collected in 2023 From the Northern Chandeleur Islands, Louisiana
In 2023, scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) conducted a sediment sampling survey at the northern Chandeleur Islands, Louisiana. Funded by the Extending Government Funding and Delivering Emergency Assistance Act (Public Law 117-43) enacted on September 30, 2021, these data complement sediment data from samples...
Nuisance algae: Planktonic communities in the Grand Calumet River Area of Concern, Indiana, 2021 Nuisance algae: Planktonic communities in the Grand Calumet River Area of Concern, Indiana, 2021
The data being released were part of a project funded by the United States Environmental Protection Agency (USEPA). This study sought to identify the bacterial and planktonic communities (cyanobacteria, eukaryotic algae) potentially contributing to eutrophication within the Grand Calumet River Area of Concern (AOC) in northern Indiana along the southern shore of Lake Michigan. In 2021...
Discharge measurements, air temperature, water temperature, and gage height data for select stream monitoring locations across Pennsylvania and Maryland piedmont mixed agriculture 2023 Discharge measurements, air temperature, water temperature, and gage height data for select stream monitoring locations across Pennsylvania and Maryland piedmont mixed agriculture 2023
As part of a larger study examining stream conditions and the effect of best management practices in the Chesapeake Bay watershed, thirty small streams across the Pennsylvania and Maryland piedmont physiographic province were instrumented and monitored for gage height (water level), water temperature, and air temperature using Onset HOBO sensors from March to September 2023. In addition...
MODFLOW-NWT model used to simulate groundwater availability in the Salt Fork Arkansas River and Chikaskia River alluvial aquifers, northern Oklahoma, 1980–2020 MODFLOW-NWT model used to simulate groundwater availability in the Salt Fork Arkansas River and Chikaskia River alluvial aquifers, northern Oklahoma, 1980–2020
The U.S. Geological Survey (USGS), in cooperation with the Oklahoma Water Resources Board (OWRB), constructed a finite-difference numerical groundwater-flow model of the Salt Fork Arkansas River and Chikaskia River alluvial aquifers by using MODFLOW-2005 with the Newton formulation solver (MODFLOW-NWT). The model included the Chikaskia River alluvial aquifer, which is classified as a...