Data Releases

All the data presented here were compiled from published U.S. Geological Survey National oil and gas assessment results, both hardcopy and digital, from 1995-present. Each record in the table has been published previously as part of a conventional or continuous assessment under the National and Global Assessment (NAGA) Project. This data release includes more than 700 records from 70...

This study was done because elevated concentrations of metals including aluminum, arsenic, and lead were identified by Navajo Nation EPA staff in the San Juan River from below the Navajo Dam, through the Navajo Nation to Mexican Hat, Utah in the Four Corners Region of the United States (Colorado, Arizona, New Mexico, Utah). An interdisciplinary team applied approaches and principles of...

Continuous Suspended-Sediment Concentration (mg/L) 15-minute time-series data computed from turbidity data during water years 2014-2018. The model information is available in the Model Archive Summary document.

The southwest population of northern sea otters (Enhydra lutris kenyoni) in Alaska was listed under the Endangered Species Act in 2005. A previous estimate of equilibrium density was derived from historical aerial survey data to inform recovery criteria, but research has since demonstrated this estimate may be biased. We used historical data to generate a new estimate of equilibrium...

The U. S. Geological Survey (USGS) Upper Midwest Environmental Sciences Center assessed water quality and phytoplankton community dynamics across connectivity gradients of the upper Mississippi River (UMR) from Pools 10 to 24. Excessive nutrient inputs and harmful algal blooms (HABs) within the Mississippi River have the potential to impact the success of restoration projects...

The U. S. Geological Survey (USGS) Upper Midwest Environmental Sciences Center collected up to 6-months of continuous data from water quality, pressure, and current sensors to measure wave-induced resuspension of sediments across six shallow ( 2 m) sites in Pool 13 of the Upper Mississippi River between April 4, 2025 and October 2, 2025. This data release includes hydrodynamic and water...

Reed canarygrass (Phalaris arundinacea L.) is one of the most common invaders of floodplains in North America. In the Upper Mississippi River floodplain, invasion by reed canarygrass is of primary concern, because reed canarygrass can drive forest loss and inhibit forest regeneration. Knowledge of where reed canarygrass occurs in wet meadow (Wm) and wet meadow shrub (Wms) areas could...

Semi-structured interviews were conducted in the Alaska Native Villages of Elim, Aniak, and St. Mary's in Western Alaska in January and February 2025. Interviews topics were developed based on the results of workshops conducted in these communities the previous summer (July 2024; see Data from July 2024 Community Workshops conducted in three villages in Western Alaska: Aniak, Elim, and...

These data represent measured topographic changes and vegetation changes of coupled sandbar-dunefield systems at six sites distributed across a 238-mile (383-km) segment of the Colorado River within Grand Canyon National Park, downstream of Glen Canyon Dam. The topographic change and vegetation change data are derived from lidar remote sensing conducted annually at each site. Drift...

A series of workshops were held in three Alaskan Native Villages, Aniak, Elim, and St. Mary’s in July 2024. These workshops focused on community observations of and concerns around weather and environmental changes. The workshop participants were community members in each of the respective communities. Participants were provided with an informed consent sheet that explained the risks and...

Actual evapotranspiration (ET) is a key variable for understanding land–atmosphere interactions and for assessing water use in agricultural, ecological, and hydrologic systems. This data release provides global, field‑scale ET data generated from Landsat observations using the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Science Processing Architecture...

Acid mine drainage originating from underground mine workings discharge to surface water within the Lefthand Creek watershed and may adversely affect downstream aquatic ecosystems and habitats. The U.S. Geological Survey (USGS), in cooperation with the U.S. Environmental Protection Agency (EPA), conducted a series of tracer injection tests to study groundwater transport and mixing...