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It may be difficult or expensive to retain on site all nitrogen brought on to farms whether for feed, fertilizer, or from animal manure
from the top result below
https://www.usgs.gov/special-topic/water-science-school/science/nitrogen-and-water
It may be difficult or expensive to retain on site all nitrogen brought on to farms whether for feed, fertilizer, or from animal manure
https://www.usgs.gov/centers/arizona-water-science-center/science/estimation-dissolved-solids-concentrations-using
All but one site, Colorado River below Cooper wasteway, had consistently well mixed instream conditions, and specific conductance was well represented by the multi-parameter probe
https://www.usgs.gov/publications/water-quality-data-selected-national-park-units-within-southern-colorado-plateau
Water samples were collected three times at each type of site including wells, springs, seeps, tinajas, rivers, a lake, and an irrigation ditch
https://www.usgs.gov/special-topic/water-science-school/science/glaciers-and-icecaps
com
June 7, 2019
The water stored in ice and glaciers moves slowly through are part of the water cycle, even though the water in them moves very slowly
https://www.usgs.gov/programs/VHP/volcano-updates
gov/hans2/view/notice/DOI-USGS-AVO-2026-09-04T18:48:35+00:00
Shishaldin Alert Level = ADVISORY Aviation Color Code = YELLOW
https://www.usgs.gov/water-science-school/science/pesticides-groundwater
gov website belongs to an official government organization in the United States
https://www.usgs.gov/centers/california-water-science-center/science/klamath-dam-removal-studies
gov website belongs to an official government organization in the United States
https://www.usgs.gov/centers/southwest-biological-science-center/science/grand-canyon-monitoring-and-research-projects
gov website belongs to an official government organization in the United States
https://www.usgs.gov/streamstats/streamstats-fundamentals
StreamStats incorporates (1) a map-based user interface for the site selection; (2) a relational data base that contains information for data-collection stations and regression equations used to estimate flow statistics for ungaged sites; (3) a GIS program that allows locating sites of interest in the user interface
https://www.usgs.gov/special-topics/great-lakes-restoration-initiative/science/areas-concern-effects-contaminants
The source of the PFASs at that location were a former air force base which conducted extensive fire-fighting training exercises at that site
https://www.usgs.gov/publications/impact-mine-and-natural-sources-mercury-water-sediment-and-biota-harley-gulch-adjacent
Both above and below sample site HG7, the amount of connate groundwater in the creek water decreased
https://www.usgs.gov/publications/regional-spectral-analysis-three-moderate-earthquakes-northeastern-north-america
We check the recorded spectra closely for anomalies that might result from site resonance or source effects
https://www.usgs.gov/centers/arizona-water-science-center/science/national-water-quality-program-monitoring-networks
Monitoring program plans for 2013–2023 are summarized below and in USGS Fact Sheet 2013-3008
https://www.usgs.gov/programs/environmental-health-program/science/study-highlights-complexity-chemical-mixtures-united
This study was an opportunity to assess the factors related to site-to-site differences in stream-contaminant complexity and to put the chemical data into context with potential effects on aquatic animal health
https://www.usgs.gov/centers/ohio-kentucky-indiana-water-science-center/science/harmful-algae-blooms-habs
Predicting when and where a bloom may occur is important to protect the public that uses and consumes a water resource; however, predictions are complicated and likely site specific because of the many factors affecting
https://www.usgs.gov/programs/environmental-health-program/science/flood-redistributes-mercury-grand-canyon-aquatic-food
Scientists collected 18–20 benthic invertebrate samples per season and site and sampled the predominant habitats using multiple approaches
https://www.usgs.gov/programs/environmental-health-program/science/dragonfly-larvae-are-effective-bioindicators-mercury
Dragonfly larvae were selected as bioindicators because they are widely distributed and abundant, are key components of aquatic food web energetic pathways, are relatively long-lived, and show high site fidelity (National Park Service
https://www.usgs.gov/staff-profiles/mark-marvin-dipasquale
During much of his USGS tenure, his research focus has been on mercury cycling in various ecosystems, including: the San Francisco Bay watershed and associated mining areas throughout CA; FL Everglades; Carson River, NV (mercury Superfund site); coastal Louisiana; Patagonia region of Argentina; Puget Sound, WA; USGS
https://www.usgs.gov/staff-profiles/scott-george
Environment Protection Agency (USEPA) superfund site EIGHTEENMILE CREEK LOCKPORT, NY), a tributary to the south shore of Lake America in New York, was designated as an Area of Concern (AOC) because water quality and bed sediments were contaminated by past industrial and municipal discharges, waste disposal, and
https://www.usgs.gov/centers/southwest-biological-science-center/science/supporting-energy-and-mineral-development
Surface reclamation generally entails recontouring a site to blend into the natural landscape, respreading saved topsoil and other amendments, establishing native vegetation, and minimizing erosion
https://www.usgs.gov/centers/sbsc/science/river-geomorphology-and-geomorphic-change?qt-science_center_objects=0
gov website belongs to an official government organization in the United States
https://www.usgs.gov/publications/environmental-data-associated-sites-infected-white-nose-syndrome-wns-october-2011
However, to predict where and when the disease will spread to new sites is difficult because detailed site information and associated environmental data are notably sparse
https://www.usgs.gov/publications/concentrations-metals-and-trace-elements-aquatic-biota-associated-abandoned-mine-lands
The site with the highest overall contamination within the park, based on both fish and invertebrate data, was WLCC, a site on Willow Creek impacted by acid mine drainage and listed as impaired under Section 303(d) of the Clean Water Act
https://www.usgs.gov/publications/and-polyfluoroalkyl-substances-duluth-mn-area-exposure-and-biomarker-responses-tree
Total egg PFAS concentrations at the ANG site and north of that site were 30–40 times higher than at the reference lake, while nestling PFAS concentrations were 10–15 times higher
https://www.usgs.gov/centers/norock/science/investigation-aquatic-invasive-species-pristine-sites-greater-yellowstone
For Grand Teton National Park, we provide an example of how invasion risk posed by human activity can be used to dictate site selection in the GRTS framework
https://www.usgs.gov/programs/climate-adaptation-science-centers/science/assessing-vulnerability-cultural-resources
This project will lead to actionable science by direct collaboration with National Park Service (NPS), WUPA, and Tribal partners to develop adaptation/mitigation strategies informed by ancestral practices and model the effects of these strategies on site-specific erosion to identify best practices to preserve cultural
https://www.usgs.gov/programs/environmental-health-program/science/multidisciplinary-approach-remediating-watersheds
Reclaimed flood plain and stream channel at former site of the Buckeye mill tailings, 2002
https://www.usgs.gov/centers/alaska-science-center/science/multi-resource-integrated-assessments-mria-and-critical
Provide a means of evaluating a site relative to the surrounding natural and societal landscape
https://www.usgs.gov/publications/2008-weather-and-aeolian-sand-transport-data-colorado-river-corridor-grand-canyon
The quantitative methods and data discussed here form a basis for monitoring ecosystem processes that affect archeological-site stability
https://www.usgs.gov/data/and-polyfluoroalkyl-substances-along-st-louis-river-and-duluth-mn-area-2019-2021
Total egg PFAS concentrations at the ANG site and north of there were 30 – 40 times higher than at the reference lake while nestling PFAS concentrations were 10 – 15 times higher than at the reference lake