Abstract Sensors and enabling technologies are becoming increasingly important tools for water quality monitoring associated resource management decisions. In particular, nutrient sensors of interest because the well‐known adverse effects enrichment on coastal hypoxia, harmful algal blooms, impacts to human health. Accurate timely information concentrations loads is integral strategies designed minimize risk humans manage underlying drivers impairment. Using nitrate as primary example, we...

Organic compounds used in agriculture, industry, and households make their way into surface waters through runoff, leaking septic-conveyance systems, regulated unregulated discharges, combined sewer overflows, among other sources. Concentrations of these organic waste (OWCs) some Great Lakes tributaries indicate a high potential for adverse impacts on aquatic organisms. During 2010-13, 709 water samples were collected at 57 tributaries, together representing approximately 41% the total...

ABSTRACT: The U.S. Geological Survey examined 25 agricultural streams in eastern Wisconsin the determine relations between fish, invertebrate, and algal metrics multiple spatial scales of land cover, geologic setting, hydrologic, aquatic habitat, water chemistry data. Spearman correlation redundancy analyses were used to examine among biotic environmental characteristics. Riparian vegetation, geologic, hydrologic conditions affected response watershed cover but assemblage dependent. It was...

For the past several years, Henry Small and collaborators1 have been arguing strongly on behalf of utility a technique called 'co-citation analysis' as tool for understanding specialty structure science. Data which we collected over two years in elementary particle physics, study weak interactions,2 allow an evaluation co-citation analysis, report results this Note. A series claims analysis made by his colleagues. The first most important claim is that clusters 'reflect . cognitive...

Trends in the concentrations of commonly occurring pesticides Corn Belt United States were assessed, and performance application several statistical methods for trend analysis evaluated. 11 with sufficient data assessment assessed at up to 31 stream sites two time periods: 1996–2002 2000–2006. Pesticides included analyses atrazine, acetochlor, metolachlor, alachlor, cyanazine, EPTC, simazine, metribuzin, prometon, chlorpyrifos, diazinon.The applied compared (1) a modified version...

Water quality (WQ) in many Great Lake tributaries has been degraded (increased nutrient and sediment concentrations) due to changes their watersheds, resulting downstream eutrophication. As part of the Lakes Quality Agreement, specific goals were established for loading constituents (e.g., phosphorus). In 2010, Restoration Initiative was launched identify problem areas, accelerate restoration efforts, track progress. 2011, U.S. Geological Survey a monitoring program on 30 lakes, representing...

For several years now sociologists of science (and other analysts) have been moving toward the study scientific specialties and smaller aggregates scientists,1 such as theory groups2 'problem domains' discussed by Studer Chubin.3 These intellectual social divisions became an increasingly salient focus attention because their real importance for ongoing requirements specialized research. It is at level specialties, groups, problem domains, not disciplines, that scientists tend to communicate...

Trends in the concentrations and agricultural use of four herbicides (atrazine, acetochlor, metolachlor, alachlor) were evaluated for major rivers Corn Belt two partially overlapping time periods: 1996−2002 2000−2006. analyzed 11 sites on mainstems selected tributaries Ohio, Upper Mississippi, Missouri River Basins. Concentration trends determined using a parametric regression model designed analyzing seasonal variability, flow-related pesticide (SEAWAVE-Q). The SEAWAVE-Q accounts effect...

ADVERTISEMENT RETURN TO ISSUEPREVFeatureNEXTAn Introduction to the National Environmental Methods IndexLawrence H. Keith, Herbert J. Brass, Daniel Sullivan, James A. Boiani, and Katherine T. AlbenCite this: Environ. Sci. Technol. 2005, 39, 8, 173A–176APublication Date (Web):April 15, 2005Publication History Published online15 April 2005Published inissue 1 2005https://pubs.acs.org/doi/10.1021/es053241lhttps://doi.org/10.1021/es053241lnewsACS Publications. This publication is available under...

First posted August 25, 2022 For additional information, contact: Director, Upper Midwest Water Science CenterU.S. Geological Survey1 Gifford Pinchot DriveMadison, WI 53726Contact Pubs Warehouse The Great Lakes Basin covers around 536,393 square kilometers, and the hold more than 5,400 cubic miles of water, accounting for 20 percent world's fresh surface water supply. provide a source drinking to tens millions people in Canada United States support one most diverse ecosystems world....

The water quality in rivers and streams selected aquifers eastern Iowa part of southern Minnesota is described illustrated. Major ions, nitrogen other nutrients, pesticides some their breakdown compounds were analyzed both surface ground water. Biological communities that included fish, invertebrates, algae, relation to stream quality. Volatile organic originate from fuels, solvent, industry ground-water samples. Agricultural urban land-use effects on shallow compared contrasted.

This article demonstrates quantitatively how far reactions are from chemical equilibrium over the full space of a two-dimensional atmospheric model. method could be used with data where an instrument-equipped aircraft measures numerous species simultaneously. An reaction is displaced by solar radiation and relocation motions. One purpose this study to seek additional stratospheric or tropospheric gas-phase that might undergo heterogeneous catalysis. Hypothetical cases can rapidly screened in...

The Milwaukee Metropolitan Sewerage District (MMSD) Corridor Study is a three-phase project designed to improve the understanding of water resources in MMSD planning area assist managers and policy makers their decisions. Phase I involved compilation existing data from multiple agencies into single database. These were analyzed identify spatial, temporal, technological gaps area, used develop II Study. II, subject this report, an intensive data-collection effort by U.S. Geological Survey...

An examination, primarily through citation analysis, is made of the changing interdependence theory and experiment in a specialty within particle physics, physics weak interactions, during period rapid intellectual development. Lakatos' notions how should be related 'progressive' 'stagnating' periods are used as guides for analysis. At conclusion suggestion offered to way which categories might best empirical research.

Gloger's rule postulates that animals should be darker colored in warm and humid regions where dense vegetation dark environments are common. Although rare Canis populations, melanism wolves is more common North America than other globally believed to follow rule. In the temperate forests of southeastern United States, historical records red wolf (Canis rufus) coyote latrans) populations document a consistent presence melanism. Today, melanistic phenotype extinct while occurring coyotes...

Changes in the water quality of stream ecosystems an urban area may manifest conspicuous ways, such as murky or smelly streamwater, less fewer native pollution-sensitive organisms. In 2004, and again 2007, U.S. Geological Survey sampled organisms—algae, invertebrates, fish—in 14 Milwaukee streams to assess part ongoing Metropolitan Sewerage District (MMSD) Corridor Study. addition, passive-sampling devices (SPMDs, “semipermeable membrane devices”) were deployed at a subset sites order...