نتایج جستجو برای: inverse estuary

تعداد نتایج: 98765  

Journal: :Marine pollution bulletin 2015
Parthasarathi Chakraborty P V Raghunadh Babu

Distribution and speciation of mercury (Hg) in the sediments from a tropical estuary (Godavari estuary) was influenced by the changing physico-chemical parameters of the overlying water column. The sediments from the upstream and downstream of the estuary were uncontaminated but the sediments from the middle of the estuary were contaminated by Hg. The concentrations of Hg became considerably le...

Masoud Montazeri Namin Mohammad Hossein Niksokhan, Zohreh Hashemi Aslani

Today, the widespread use of fossil fuels is caused many problems in the world, which include: Ozone depletion, the increase carbon dioxide in the atmosphere, growing recognition of climate change impacts and decreasing fossil fuel resources. These issues have led to an increased interest in the mass generation of electricity from renewable sources such tidal energy. The Khowr-e Musa Estuary, l...

2007
José Antonio Mompean

This paper examines the ontological status of the supposedly new accent of England termed Estuary English by comparing its phonetics with those of Received pronunciation and Cockney, two varieties with which Estuary English is often compared. The paper also discusses some of the criteria that may be used to draw the boundaries between the three varieties and the potential status of Estuary Engl...

Journal: :The Science of the total environment 2014
Gregory W McCarty Cathleen J Hapeman Clifford P Rice W Dean Hively Laura L McConnell Ali M Sadeghi Megan W Lang David R Whitall Krystyna Bialek Peter Downey

Over 50% of streams in the Chesapeake Bay watershed have been rated as poor or very poor based on the index of biological integrity. The Choptank River estuary, a Bay tributary on the eastern shore, is one such waterway, where corn and soybean production in upland areas of the watershed contribute significant loads of nutrients and sediment to streams. We adopted a novel approach utilizing the ...

2013
Mélanie Raimonet Françoise Andrieux-Loyer Olivier Ragueneau Emma Michaud Xavier Philippon Michel Nonent Laurent Mémery

12 13 This study aims to investigate the role of spatial and temporal physical, biological and 14 biogeochemical gradients on sediment biogeochemistry along a macrotidal and Si-rich estuary. 15 Scanning and biogeochemical analyses were performed in the inner, mid and outer Aulne Estuary 16 (France) at four seasons. The inner estuary shows high diagenetic activity linked to fluid mud 17 dynamics...

Journal: :The Science of the total environment 2009
M Villa F Mosqueda S Hurtado J Mantero G Manjón R Periañez F Vaca R García-Tenorio

The Huelva Estuary in Huelva, Spain, has been one of the most studied environmental compartments in the past years from the point of view of naturally occurring radioactive material (NORM) releases. It has been historically affected by waste releases, enriched in radionuclides from the U-decay series, from factories located in the area devoted to the production of phosphoric acid and phosphate ...

2016
David A. Sutherland Molly A. O'Neill

Hypoxia is an issue of growing concern for coastal communities. In the California Current System, a prototypical eastern boundary current, attention has been focused on explaining the trend of increasing shelf hypoxia. Despite the regional focus on hypoxia in eastern boundary regions, relatively few studies have examined smaller estuarine systems. Here, we present results from an observational ...

2011
Adam Woźniczka Sławomira Gromisz Norbert Wolnomiejski

During a study carried out in spring-summer 2010, the invasive Ponto-Caspian polychaete Hypania invalida (Grube, 1960) was recorded for the first time in the southern part of the River Odra estuary (southern Baltic). This is the first record of this species in Poland or in any a Baltic estuary. The appearance of H. invalida in the Odra estuary coincided with flood water descent in the Odra, sug...

2014
Mohamed Ali Geawhari Lloyd Huff Nadia Mhammdi Athena Trakadas Abdellah Ammar

BACKGROUND Several different classifications to characterize estuarine systems have been proposed. In this present paper, one of the most important estuaries in North Africa, the Oued Loukkos (Morocco), forms a case-study for proposing a systematic classification of this particular tidal estuary according to the vertical salinity gradient. FINDINGS This study, conducted using a CTD, shows tha...

2008
W. R. Geyer R. Chant R. Houghton

[1] A sequence of dye releases in the Hudson River estuary provide a quantitative assessment of horizontal dispersion in a partially mixed estuary. Dye was released in the bottom boundary layer on 4 separate occasions, with varying tidal phase and spring-neap conditions. The three-dimensional distribution of dye was monitored by two vessels with in situ, profiling fluorometers. The three-dimens...

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