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  • discharge
  • The total area diverted away from the Gulf of St. Lawrence and toward the Gulf of Mexico by Quaternary stream piracy represents at least ~420,000 km 2 of the modern Mississippi River basin and provides nearly one quarter of the mean annual discharge of the Mississippi River. (geosociety.org)
  • Stream morphology has degraded due to channel straightening and deepening, natural riparian vegetation removal and discharge regulated by weirs and dams. (mdpi.com)
  • aquatic
  • Microbial respiration estimated from sediment organic carbon stocks and enzyme decomposition models and extrapolated to the ecoregional and national scales suggests that microbes account for 17% of the total CO2 outgassing, and 60% of the aquatic metabolism C losses, from US streams and rivers. (epa.gov)
  • Land use/cover, aquatic and riparian vegetation, stream size and water chemistry were the most important factors structuring Heteroptera assemblages. (springer.com)
  • Today, the U.S. Environmental Protection Agency released the results of the first comprehensive survey looking at the health of thousands of stream and river miles across the country, finding that more than half - 55 percent - are in poor condition for aquatic life. (epa.gov)
  • EPA, state and university scientists analyzed the data to determine the extent to which rivers and streams support aquatic life, how major stressors may be affecting them and how conditions are changing over time. (epa.gov)
  • Vegetation along rivers and streams slows the flow of rainwater so it does not erode stream banks, removes pollutants carried by rainwater and helps maintain water temperatures that support healthy streams for aquatic life. (epa.gov)
  • This comprehensive survey will also help develop improvements to monitoring these rivers and streams across jurisdictional boundaries and enhance the ability of states and tribes to assess and manage water quality to help protect our water, aquatic life, and human health. (epa.gov)
  • ecology
  • The research, published in the journal Frontiers in Ecology and the Environment , documents that 20 major U.S. streams and rivers - including such prominent rivers as the Colorado, Potomac, Delaware, and Hudson - have shown statistically significant long-term warming. (eurekalert.org)
  • Biodiversity
  • Finally, we conducted a field survey and a lab-scale model stream experiment and demonstrated that triclosan exposure is linked to increases in triclosan resistance and decreases in biodiversity within benthic bacterial communities. (glrppr.org)
  • ecological
  • Our River Team integrates transportation infrastructure with ecological expertise to protect sensitive fish populations in the Pacific Northwest and beyond. (geoengineers.com)
  • Their ecological status was classified by biological quality elements (macrophytes and phytobenthos, benthic invertebrates and fish, and in large rivers, phytoplankton) and specific synthetic and non-synthetic pollutants. (mdpi.com)
  • To that date, only 23 (4%) streams achieved an ecological status of "good", while the rest failed to achieve the environmental objective. (mdpi.com)
  • nutrient
  • The two main reasons for the failure were significant alterations to the stream morphology (81% of all streams) and nutrient enrichment (62%) caused by point (industrial and municipal waste water treatment plants) and non-point (surface run-off from arable fields, discharges from urban drainages and decentralized waste water treatment plants) sources. (mdpi.com)
  • contamination
  • Since fecal coliform bacteria live in the gut of warm-blooded animals, fecal contamination of rural streams can come not only from humans, but also from livestock, pets, and wildlife (including birds). (nps.gov)
  • The report also found other sources of contamination in some streams, and noted the need for additional research to bolster the findings and refine the methods. (nps.gov)
  • When a river system is impacted by contamination, our team considers each variable to arrive at the most effective, remediation plan by integrating upland, waterfront and in-water remediation solutions. (geoengineers.com)
  • riparian
  • Hood River County has drafted a plan to protect riparian areas along fish-bearing waterways with minimal regulation of private property. (hoodrivernews.com)
  • Gorge
  • One of these studies was conducted in New River Gorge by the U.S. Geological Survey, in cooperation with the National Park Service. (nps.gov)
  • The county will not regulate lands within its borders that are currently managed by other agencies, including the Columbia River Gorge National Scenic Area and Mt. Hood National Forest. (hoodrivernews.com)
  • Objective
  • It was anticipated that a further 55 streams would achieve the environmental objective by 2015, but the remaining 539 need extended deadlines. (mdpi.com)
  • Creek
  • You may know them simply as a small creek running through the backyard, or the little stream that only appears when it rains. (americanrivers.org)
  • ecoregions
  • There were significant ecoregion and stream size effects in the unbalanced, nested analysis of variance of the microbial variables, with organic matter decomposition and modeled microbial respiration increasing from the eastern ecoregions, through the plains ecoregions, to the western ecoregions. (epa.gov)
  • significant
  • The analysis indicates that 20 of the 40 streams studied showed statistically significant long term warming trends, while an additional 13 showed temperature increases that were not statistically significant. (eurekalert.org)
  • Two rivers showed significant temperature decreases. (eurekalert.org)
  • large
  • The major perennial streams feeding into the Colorado (such as Kanab and Havasu creeks, the Little Colorado River and the Paria River) are related to large perennial spring systems on both the north and south sides of the Canyon. (us-parks.com)
  • A generic study of the transport of an inert solute in the Lule River, Sweden, using this kind of relationship, indicated that the hyporheic exchange can have a large practical implication. (diva-portal.org)
  • Headwater streams house a large number of unique taxa. (americanrivers.org)
  • fish
  • He said those sites will not be affected by the 75 foot setback that is now proposed along the Hood River and 25 feet for other fish-bearing streams. (hoodrivernews.com)
  • Our fishery experts evaluate the impact of in-river construction and other activities on protected fish populations. (geoengineers.com)
  • In urban environments and other places where natural river channels may not be possible, GeoEngineers provides dredging design and permitting services to maintain the flood conveyance and overall health of rivers and channels and the fish that live in them. (geoengineers.com)
  • runoff
  • The rivers may also be negatively affected by trace metals and other compounds, sediment, and acidic runoff. (nps.gov)
  • Systems
  • It's both surprising and remarkable that so many diverse river systems in North America behaved in concert with respect to warming," said Dr. David Secor of the UMCES Chesapeake Biological Laboratory whose work focused on Maryland's Patuxent River, where he has noted a 3°F increase since 1939. (eurekalert.org)
  • Being able to measure and predict sediment transport is an important component of repairing river systems. (geoengineers.com)
  • Understanding of the processes affecting solute transport in flowing water is important for the possibility to predict the evolution with time of polluted stream systems. (diva-portal.org)
  • River systems and associated landscapes are often viewed to exist in a dynamic equilibrium that exhibits a natural range of variability until and unless external driving forces cause a radical change such as abrupt drainage reorganization. (geosociety.org)
  • experiment
  • This thesis presents tracer experiment methodology and model developments for solute transport in streams, with special focus on retention processes and their effect on solute stream transport. (diva-portal.org)
  • Results are presented from a tracer experiment in the Säva Stream, Uppland County, Sweden, where both a conservative ( 3 H as tritiated water) and a reactive ( 51 Cr as trivalent chromium ion) tracer were injected simultaneously. (diva-portal.org)
  • processes
  • Independent observations in the stream water and hyporheic zone as well as choice of evaluation method are essential for a correct interpretation of the processes. (diva-portal.org)
  • sources
  • Focusing on rivers and streams, we conducted a content analysis of existing publications to document the breadth and frequency with which various measurable attributes, such as flooding, water quality characteristics, and wildlife appeared in different news sources over a multiyear timeline. (ecologyandsociety.org)
  • miles
  • Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place. (us-parks.com)
  • Planning Director Mike Benedict is seeking to meet Goal 5 of the state land-use rules by writing an ordinance that will govern ground-disturbing activities along 160 miles of rivers and streams. (hoodrivernews.com)
  • Hikers unable to safely cross the Sandy River because of its water level may have to hike 2.7 miles north on the Pacific Crest Trail (formerly Bald Mountain Trail #784) to the Top Spur trailhead along Road 118 near Lolo Pass. (backpacking.net)
  • Intermittent, ephemeral, and headwater stream miles as percentage of total stream miles. (americanrivers.org)
  • environmental
  • The aims of this study were to investigate Heteroptera distribution and abundance in Greek streams, identify the environmental factors that are linked to variation in their assemblages and to partition the influence of environmental and spatial components, alone and in combination, on Heteroptera community composition. (springer.com)