Isopleth maps of pH and alkalinity in stream waters, and sodium in stream sediments of West Virginia

1994 ◽  
Keyword(s):  
West Virginia ◽  
Stream Sediments ◽  
Stream Waters

scholarly journals Uranium-bearing metasediment and granite in the Tasermiut area, South Greenland

1981 ◽  
Vol 105 ◽  
pp. 47-51
Author(s):  
B.L Nielsen ◽  
T Tukiainen
Keyword(s):  
Stream Sediments ◽  
Uranium Deposits ◽  
The South ◽  
Planning Stage ◽  
Preliminary Results ◽  
Bay Area ◽  
Vein Type ◽  
Uranium Exploration ◽  
Stream Waters

Regional exploration for uranium was carried out in South Greenland in 1979 and 1980. From the planning stage the area between the fjords Tasermiut and Søndre Sermilik (fig. 16) was considered a favourable target beeause uranium deposits from geological environments of similar age, strueture and lithology are known, e.g. the Makkovik Bay area in Labrador (Gandhi et al., 1969; McMillan, 1976). The deposits sought were mainly pegmatitic or vein type deposits related to a Proterozoie unconformity (Nielsen, 1980). During the South Greenland uranium exploration project the area was covered in 1979 by a regional reconnaissance gamma-spectrometric survey and by drainage geochemistry (stream sediments and stream waters). Several areas of anomalous radioactivity were recordcd (Armour-Brown et al.) 1980), and an the basis af this and short field visits in 1979 ir was decided to undertake a more systematic follow-up in 1980. The preliminary results af this work are reported below.

Anthropogenic impact on urban rivers: insights from the Mugnone Creek (Florence, Italy) waters and sediments characterization in the framework of the multidisciplinary SENECA project

2021 ◽  
Author(s):  
Gabriele Bicocchi ◽  
Stefania Venturi ◽  
Alessio Monnanni ◽  
Tania Martellini ◽  
David Chelazzi ◽  
...  
Keyword(s):  
Anthropogenic Impact ◽  
City Planning ◽  
Winter Season ◽  
Stream Sediments ◽  
Sediment Geochemistry ◽  
Urban Stream ◽  
Rock Interaction ◽  
Mass Load ◽  
Dissolved Ions ◽  
Stream Waters

<p>Urbanization is a striking phenomenon, responsible for the development of cities as complex and highly dynamic systems. One of the most pressing issues in urban areas is water cycle management, which directly influences the availability and the quality of this resource. Urban streams are highly vulnerable to the impacts resulting from the increasing urbanization and they have often lost most of their pristine, natural character.</p><p>We hereby present the preliminary results of the multidisciplinary StrEams urbaN Ecological City plAnning (SENECA) project, which is not only but mainly devoted to characterizing the chemical features of stream waters and sediments of the Mugnone Creek (MC). MC is a typical example of an urban stream, crossing the city of Florence (Italy) and eventually discharging to the Arno River, that has suffered an intense denaturation due to the urban sprawl, such as several diversions, canalizations and rectifications, alterations of the stream bed and riparian habitat, widespread concrete revetment of the banks and burial of short stream tracts.</p><p>Different sites along the 17-km long MC were investigated for water and sediment geochemistry from upstream of the Florence urban area (“blank” sites) to the MC outlet (Cascine Park), passing through variably urban-impacted areas, including sites located along traffic-congested roads, close to the new tramway construction sites and under the railway line. Stream waters were sampled twice a year (June and December 2019 and 2020) to account for seasonal variability. Stream discharge at three representative points was simultaneously determined during water sampling to allow mass load calculations of contaminants. In details, major dissolved ions (Ca, Mg, Na, K, HCO<sub>3</sub>, SO<sub>4</sub>, Cl, NO<sub>3</sub>) and reduced nitrogen (NH<sub>4</sub>), trace elements (TEs: Sb, As, Cu, Zn, Cd, Co, Ba, Li, Pb, Ni) and microplastics (MPs) in stream sediments and waters of MC were determined. Major dissolved ions and NH<sub>4</sub> were analysed via acidimetric titration and IC. TEs were determined in both sediments and waters (0.45 μm filtered and unfiltered) by ICP-OES and ICP-MS, respectively. MPs (1 μm-5 mm) were identified in sediments and waters by HD binocular stereomicroscope.</p><p>Chemical composition (major element constituents) of water reflected both the seasonality and the progress of the water-rock interaction acting in MC from its spring toward the outlet. In addition, the pattern of abundances of Cu, Zn, Sb and Pb and especially their mass loads reflect the increasing anthropogenic impact on the water and sediments, even if is important to stress that the contents are within the limits defined by law, except for stream sediments at a few sites. For MPs, up to 10<sup>9</sup> particles, coming mainly from the NW side of Florence, are estimated to be discharged daily to the Arno River during the winter season, much higher than creeks with similar urbanization contexts worldwide. Increasing data collection will make it possible to identify and better understand what type of sources and processes are responsible for the anthropogenic impacts in the MC and could help in better safeguarding the creek within the framework of the urban social-ecological systems of Florence.</p>

scholarly journals Micro-charcoal abundances in stream sediments from Buckeye Creek Cave, West Virginia, USA

2012 ◽  
Vol 74 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Gregory Springer ◽  
L. Nivanthi Mihindukulasooriya ◽  
D. Matthew White ◽  
Harold Rowe
Keyword(s):  
West Virginia ◽  
Stream Sediments

scholarly journals Heavy-metal content of stream sediments and stream waters, Rolla 1 degree by two degrees Quadrangle, Missouri

1982 ◽  
Author(s):  
Paul Dean Proctor ◽  
B. Sinha ◽  
B. Afzali ◽  
T. Vanhorst ◽  
S.K. Odland
Keyword(s):  
Heavy Metal ◽  
Metal Content ◽  
Stream Sediments ◽  
Heavy Metal Content ◽  
Stream Waters
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