نتایج جستجو برای: sediment concentration and distribution

تعداد نتایج: 16928187  

ژورنال: اکوبیولوژی تالاب 2020
Pourkhabbaz, Hamid Reza, Cheraghi, Mitra , Hedayatzadeh, Fariba ,

Assessment of heavy metals concentrations in aquatic ecosystems can be effective to taking actions to improve the quality of environmental conditions. Therefore, this study was downed to evaluate the heavy metals pollution in water and sediments of water supply points of water treatments in Ahvaz and Mollasani along Karun River and the effect of physico-chemical parameters on these pollutants c...

Ali Reza Nikouyan, Fereidoon Owfi, Khosrow Aein Jamshid, Mahnaz Rabbaniha, Mohammad Seddiq Mortazavi, Saeid Sanjani,

In the present article, the environmental impacts of the Iraq-Kuwait war (1991) on the ecological condition and fisheries resources of the northern part of the Persian Gulf, during years 2001-2002 were studied. The investigated area included the whole stretch of the Iranian domain of the Persian Gulf from northwestern waters of the Khuzestan province to northeastern waters of the Hormuzgan prov...

2012
Feng Chen

Surface sediment samples were collected from the Canon River mouth, Taiwan and analyzed for polycyclic aromatic hydrocarbons (PAHs). Total PAHs concentrations varied from 337 to 1,252 ng/g dry weight, with a mean concentration of 827 ng/g dry weight. The spatial distribution of PAHs reveals that the PAHs concentration is relatively high in the river mouth region, and gradually diminishes toward...

B. Moghadasi H. Manoochehri N. Mooraki, R. Changizy

The spatial distribution of benthic foraminiferal assemblage of Nayband Bay and Haleh Estuary in the North-West of the Persian Gulf, was explored during 2011-2012 . The relationship between spatial pattern of foraminifera assemblages and the ambient factors (i.e. water temperature, salinity, pH, dissolved oxygen, sediment grain size distribution, sediment organic content, and CaCO3 concentrati...

B. Moghadasi, H. Manoochehri, N. Mooraki, R. Changizy,

The spatial distribution of benthic foraminiferal assemblage of Nayband Bay and Haleh Estuary in the North-West of the Persian Gulf, was explored during 2011-2012 . The relationship between spatial pattern of foraminifera assemblages and the ambient factors (i.e. water temperature, salinity, pH, dissolved oxygen, sediment grain size distribution, sediment organic content, and CaCO3 concentrati...

Sediment rating curve is an essential factor for many river engineering subjects and computations such as dredging, design of storage dams, river intakes design and sand mining management. Although, this curve is established using simultaneous measurement of flow and sediment transport discharges, however, due to lack of reliable data during flood events, it has limited reliability in flood con...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2011
m, ebrahimi m, jafari gh. r, savaghebi h, azarnivand a, tavili

the concentration of three metals, zinc, copper and chromium in roots, rhizomes, stems and leaves of phragmites australis (common reed) and scirpus maritimus, and in the corresponding sediment and water samples from lia industrial area (qazvin, iran) were investigated to determine difference in distribution among plant organs. data were collected at during 1-year period. results showed that met...

2012
Wan Ying Lim Ahmad Zaharin Aris Mohamad Pauzi Zakaria

This paper determines the controlling factors that influence the metals' behavior water-sediment interaction facies and distribution of elemental content ((75)As, (111)Cd, (59)Co, (52)Cr, (60)Ni, and (208)Pb) in water and sediment samples in order to assess the metal pollution status in the Langat River. A total of 90 water and sediment samples were collected simultaneously in triplicate at 30 ...

ژورنال: علوم آب و خاک 2014
خواستار بروجنی, میلاد, صمدی بروجنی, حسین, اسماعیلی, کاظم ,

Due to adhesion properties of fine sediments, chemical physics factors of fluid can cause changes in the behavior of sediments. In this study, the characteristics of sediment deposition with three levels of waste water, different shear stresses and initial sediment concentrations were investigated in the annular flume located at Hydraulic Laboratory of Shahrekord University. Sediments for exper...

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