All Data

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...

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...

This model archive summary describes the development and methods used to derive and compute a suspended-fines ( 0.0625 mm particle size) model at USGS site ID# 14211720, Willamette River at Portland. The suspended-fines equations will be used to create real-time estimates of concentration and load that will help science entities, managers, and others, monitor sediment transport in the...

This model archive summary describes techniques and methods used to derive and compute a second version of a suspended-sediment model at USGS site14211720, Willamette River at Portland. The created suspended-sediment concentration equations will be used to create real-time estimates of concentration and load which are available through the National Water Information System. The time...

This model archive summary describes the development and methods used to derive and compute a suspended-sand (> 0.0625 mm particle size) model at USGS site ID# 14211720, Willamette River at Portland. The suspended-sand equations will be used to create real-time estimates of concentration and load that will help science entities, managers, and others, monitor sediment transport in the...

The U.S. Geological Survey (USGS) conducted interviews of professionals who make decisions about marshes during the Salt Marsh Evolution along the South Atlantic Bight project (SAB project) and the Marsh Model Retrospective initiative. During the SAB project, an advisory committee of marsh model users were interviewed in June 2023 about what decisions they make about marshes and how they...

This data release contains input data and results for an investigation of special conditions for peak streamflow and extreme floods for USGS streamgages in Alaska. Special conditions can include data-collection conditions, basin conditions, flood-generating mechanisms, or other information and can be critical for informing hydrologic analyses such as flood frequency analysis. The dataset...

Aquatic reflectance data from Sentinel-2 satellite imagery is paired with continuous water quality measurements across the Delaware, Illinois, Trinity, Upper Colorado, and Willamette River basins in the United States from July 2015 through September 2024. The dataset contains a zipped file (Matched_WQ_S2.zip) containing two csvs of matched continuous colored dissolved organic matter...

Species differ in their habitat preferences based on seasonal hydrologic conditions. Species such as the semi-aquatic marsh rice rat (Oryzomys palustris) are adapted to high water conditions, while other species, such as the hispid cotton rat (Sigmodon hispidus) and the cotton mouse (Peromyscus gossypinus) prefer drier hammocks during the wet season. The aim of our study was to...

U. S. Geological Survey (USGS) scientists completed a data collection campaign from the 3rd of April to the 23rd of June in 2023, using various methods to record geomorphic and habitat indicators throughout 30 streams in southern Pennsylvania and northern Maryland. Field methods included GNSS surveys, gravelometer-based pebble count readings, visual assessments, and riparian analyses...

Data blended from a variety of sources to explore the effects of feeding on elk population productivity metrics with the incorporation of climate, predator, and harvest data over a 26-year time frame. Data are for elk herd units in northwestern Wyoming and two herd subunits for southwestern Montana.

A method was developed to measure the presence and concentration of the organic volatile fatty acids (VFA) formate, malate, lactate, acetate, and propionate in aqueous samples using high performance liquid chromatography (HPLC) and ultraviolet absorbance detection. This dataset includes a method detection limit (MDL) study, along with appropriate quality control samples, used to verify...