نتایج جستجو برای: sediment texture

تعداد نتایج: 78024  

Journal: :Environmental monitoring and assessment 2007
K A Jayaraj K V Jayalakshmi K Saraladevi

The paper deals with the standing stock of macrobenthic infauna and associated environmental factors influencing the benthic community in the shelf region of the northwest Indian coast. The data were collected onboard FORV Sagar Sampada during the winter monsoon (January-February, 2003) to understand the community structure and the factors influencing the benthic distribution. The environmental...

2003
C. Escutia D. Warnke G. D. Acton A. Barcena L. Burckle M. Canals C. S. Frazee

The study of existing cores collected across the Wilkes Land margin provides us with a better understanding of the sediment distribution and processes across this margin during the Holocene, and during Pleistocene glacial and interglacial cycles. Holocene depositional rates are high in deep (>1000m) inner-shelf basins where diatomaceous ooze is deposited at estimated minimum sedimentation rates...

Journal: :Your fund choices 2022

Sedimentation is a crucial factor when it comes to river problems. Sediment can cause silting of the so that its capacity be reduced and overflow water surface. Every year, Districts Nanga Mahap at Sekadau Regency always experiences flooding problem still happening up until now. One causes occurrence in District River. This study aims determine characteristics rates bottom sediment transport ra...

2017
Vahid Noroozi Karbasdehi Sina Dobaradaran Iraj Nabipour Afshin Ostovar Hossein Arfaeinia Amir Vazirizadeh Roghayeh Mirahmadi Mozhgan Keshtkar Fatemeh Faraji Ghasemi Farzaneh Khalifei

BACKGROUND The aim of present work was to assess the concentration levels as well as vertical distribution of indicator bacteria including total coliform, fecal coliform, Pseudomonas aeruginosa, and Heterotrophic Plate Count (HPC) in the marine environment (seawater and coastal sediments) and evaluate the correlation between indicator bacteria and some physicochemical parameters of surface sedi...

2014
Anabella Covazzi Harriague Giorgio Bavestrello Marzia Bo Mireno Borghini Michela Castellano Margherita Majorana Francesco Massa Alessandro Montella Paolo Povero Cristina Misic Erik V. Thuesen

Seamounts and their influence on the surrounding environment are currently being extensively debated but, surprisingly, scant information is available for the Mediterranean area. Furthermore, although the deep Tyrrhenian Sea is characterised by a complex bottom morphology and peculiar hydrodynamic features, which would suggest a variable influence on the benthic domain, few studies have been ca...

2011
Ruth M Morgan James Robertson Chris Lennard Kimberley Hubbard Peter A Bull Jill Dando

This paper provides our first forensic quartz grain surface texture analysis of soils from the southern hemisphere. Sediment and soil samples were collected from a simulated crime reconstruction in the environs of Canberra, Australia, which comprised a murder site, an alibi site and a body deposition site. Following the successful application of quartz grain surface texture analysis from many c...

Journal: :Environmental Health Perspectives 1974
Pierre E. Biscaye

An important problem in the study of microparticles in the marine environment, suspended in the water column or deposited as sediment on the ocean bottom, is the determination of provenance of the microparticles-where did they come from and by what processes were they transported to the sampling location? Two techniques of possible interest to those concerned with tracing the origins and disper...

2007
K. K. Balachandran C. M. Laluraj G. D. Martin K. Srinivas

The geochemical condition of surface sediments in a tropical estuary and adjoining shelf region is presented for their elemental interactions using statistical methods. Principal component analysis separated two clusters comprising of (i) heavy metals possessing significant correlation with texture (organic carbon, clay and silt), which belong to sediments in the shelf region and (ii) heavy met...

2006
K. F. G. Hosking

The manner of occurrence of sulphides (pyrite and pyrite melnikovite?) in a number of samples from the Philippine Sea is described and their genesis briefly discussed. Polished sections of consolidated material revealed both shards of volcanic glass and pyritized remains of microorganisms (Radiolaria?) in a pyrite matrix with a mosaic texture. The mosaic texture is thought to be due to early sy...

Extended abstract 1- Introduction Urmia Lake as the largest domestic lake in Iran is drying. Climate change in the northwest of Iran, rainfall reduction and evaporation, due to the increase in average temperature in the Northwest of the country accompanied with the involvement of human factors such as dam construction, have caused an irreparable environmental hazard in the northwestern of Ira...

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