Results 41 to 50 of about 1,538,323 (350)

Features of heavy metals distribution in bottom sediments of the rivers of Ukraine

open access: yesМінеральні ресурси України, 2018
The chemical composition of bottom sediments is an important indicator of the ecological state of both water systems and watershed areas, since contaminated bottom sediments are a potential source of secondary pollution of aquatic systems.
N. G. Lyuta
doaj   +1 more source

Seabed sub-bottom sediment classification using parametric sub-bottom profiler [PDF]

open access: yesNRIAG Journal of Astronomy and Geophysics, 2016
AbstractMany studies have been published concerning classification techniques of seabed surfaces using single beam, multibeam, and side scan sonars, while few paid attentions to classify sub-bottom layers using a non-linear Sub-Bottom Profiler (SBP). Non-linear SBP is known for its high resolution images due to the very short pulse length and aperture ...
Saleh, Mohamed, Rabah, Mostafa
openaire   +1 more source

In situ benthic fluxes from an intermittently active mud volcano at the Costa Rica convergent margin [PDF]

open access: yes, 2005
Along the erosive convergent margin off Costa Rica a large number of mound-shaped structures exist built by mud diapirism or mud volcanism. One of these, Mound 12, an intermittently active mud volcano, currently emits large amounts of aqueous dissolved ...
Hensen, Christian   +4 more
core   +1 more source

Temporal trends of 137Cs concentration in seawaters and bottom sediments in coastal waters around Japan: implications for the Kd concept in the dynamic marine environment

open access: yesJournal of Radioanalytical and Nuclear Chemistry, 2019
Radioactivity concentrations of 137Cs in seawaters and bottom sediments have been measured in the coastal waters off all nuclear power plant sites in Japan. Sediment distribution coefficient (Kd) values obtained before the Fukushima Daiichi Nuclear Power
M. Kusakabe, H. Takata
semanticscholar   +1 more source

MODERN HYDROACOUSTIC METHODS FOR STUDYING THE BOTTOM RELIEF AND BOTTOM SEDIMENTS OF THE DNIEPER RIVER: WAYS OF USING IT IN THE EXPLORATION AND DEVELOPMENT OF RIVER SAND DEPOSITS

open access: yesГеологія і корисні копалини Світового океану, 2022
The difficult state of the economy of the state entailed a practical lack of funding for geological survey, prospecting work, a comprehensive geological study of the territory of Ukraine, natural and anthropogenic changes in the geological environment in
Fedoseienkov S.H.
doaj   +1 more source

An excess Ra-226 chronology for deep-sea sediments from Saanich Inlet, British Columbia [PDF]

open access: yes, 2007
To further explore the efficacy of 226Ra(excess) dating for deep-sea sediments, previously dated varve sediments from Saanich Inlet were investigated.
Anderson   +71 more
core   +1 more source

Accumulation of sadmium and zinc in bottom sediments of different waters of Lithuania [PDF]

open access: yesJournal of the Serbian Chemical Society, 2007
Distribution of cadmium and zinc in the bottom sediments of different waters of Lithuania was investigated using flame atomic absorption spectrometry (FAAS).
STASYS TAUTKUS   +2 more
doaj   +3 more sources

ASSESSMENT OF CHLORIDE ION POLLUTION OF SMALL RIVERS IN THE NIZHNEVARTOVSK REGION

open access: yesSiberian Journal of Life Sciences and Agriculture, 2020
The importance in assessing the environmental situation in the Khanty-Mansi Autonomous Okrug is represented by the concentration of chemicals in surface waters and bottom sediments, which characterize the technogenic flows of pollutants in the areas of ...
Denis Andreevich Alagulov   +1 more
doaj   +1 more source

An assessment of bottom current controlled sedimentation in Pacific Ocean abyssal environments [PDF]

open access: yes, 2018
The effect of the circulation of polar-sourced dense waters on the deep seafloor is still largely unknown. This paper presents multibeam bathymetric evidence for the existence of present-day contourite drifts on the central Pacific ocean at depths ...
De Bruycker, Wouter   +2 more
core   +2 more sources

Study of the features of determination of heavy metals in bottom sediments

open access: yesIOP Conference Series: Earth and Environment
In the work with the application of the atomic absorption method, the peculiarities of the influence of sample preparation on the degree of extraction of heavy metals in samples of bottom sediments were analyzed.
Valentyna M. Loboichenko   +6 more
semanticscholar   +1 more source

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