نتایج جستجو برای: polluted river

تعداد نتایج: 92963  

2012
M. T. H. van Vliet J. R. Yearsley W. H. P. Franssen

Realistic estimates of daily streamflow and water temperature are required for effective management of water resources (e.g. for electricity and drinking water production) and freshwater ecosystems. Although hydrological and process-based water temperature modelling approaches have been successfully applied to small catchments and short time periods, much less work has been done at large spatia...

Journal: :Applied and environmental microbiology 2003
I H M Brümmer A Felske I Wagner-Döbler

The beta-subgroup of the Proteobacteria has been shown to be important in aquatic habitats and was investigated in depth here by molecular 16S rRNA techniques in biofilms of the Elbe River and its polluted tributary, the Spittelwasser River. The bacterial 16S rRNA genes were cloned from each site, screened for beta-proteobacterial clones and sequenced. River biofilm clones from both rivers grou...

Farshid Majnoni , Gholamreza Banagar , Hossein Alipour, Majid Ajorlo , Mehdi Hassanpour ,

Background: This study aimed to evaluate the pollution levels of surface water with heavy metals including Pb, Cd and Cr in Gheshlagh River, western Iran. Methods: Water and sediment were sampled in five monitoring stations with three replicates in time along the river. The concentration of Cr, Pb and Cd in both water and sediment samples were measured with graphite furnace atomic absorption ...

2012
Weihua Li Bo Chen Xuncheng Ding

Although maternal and infant mortality has been reduced in China over the past several years, the country is still facing big challenges in reproductive health (Fang and Kaufmann 2008). In 2001, the prevalence of birth defects reported in China was higher than that in most developed One possible contributor to the reproductive health burden in China may be environmental pollution. The most popu...

Journal: :Applied sciences 2022

Five countries share the catchment of Tisza River (Central Europe). In most households electricity and water are available, by washing synthetic clothes they can produce a large number microfibers. However, in many sub-catchments river, wastewater treatment is insufficient; therefore, microplastics (MP), especially plastic microfiber emissions into rivers, represent problem. Our goal was to ana...

Journal: :Environmental science and pollution research international 2012
Karen L Bushaw-Newton Evan C Ewers David J Velinsky Jeffrey T F Ashley Stephen E Macavoy

UNLABELLED BACKGROUND AIM AND SCOPE: Though the tidal Anacostia River, a highly polluted riverine system, has been well characterized with regard to contaminants, its overall resident bacterial populations have remained largely unknown. Improving the health of this system will rely upon enhanced understanding of the diversity and functions of these communities. Bacterial DNA was extracted from ...

2016
Violeta Poma Nataniel Mamani Volga Iñiguez

La Paz River in Andean highlands is heavily polluted with urban run-off and further contaminates agricultural lowlands and downstream waters at the Amazon watershed. Agricultural produce at this region is the main source of vegetables for the major Andean cities of La Paz and El Alto. We conducted a 1 year study, to evaluate microbial quality parameters and occurrence of multiple enteropathogen...

2004
M S. Zimmerman

A 14-month study was carried out to determine the impact of kraft-mill effluents on the offshore benthic macrophyte distribution in a shallow north Florida Bay (USA). A polluted river drainage system was compared to an adjoining (unpolluted) one. The affected area was characterized by elevated levels of color and turbidity. Inshore areas associated with high levels of KME were characterized by ...

Classification of water quality is the most important step for controlling the pollution of water. The aim of this study was classifying the water quality of the Talar River basin by analyzing the existing data of six monitoring stations. Multivariate statistical techniques such as cluster analysis (CA), principal component analysis (PCA) and factor analysis (FA) were used to assessment the spa...

Journal: :iranian journal of toxicology 0
فرشید مجنونی farshid majnoni department of environmental sciences, bojnourd branch, islamic azad university, bojnourd, iran. حسین علی پور hossein alipour m.sc of environmental and natural resources engineering, young researchers and elite club, bojnourd branch, islamic azad university, bojnourd, iran مهدی حسن پور mehdi hassanpour m.sc of environmental protection agency, gorgan, iran. غلامرضا بناگر gholamreza banagar department of environmental sciences, bojnourd branch, islamic azad university, bojnourd, iran. مجید آجرلو majid ajorlo department of rangeland and watershed management, university of zabol, zabol, iran.

background: this study aimed to evaluate the pollution levels of surface water with heavy metals including pb, cd and cr in gheshlagh river, western iran. methods: water and sediment were sampled in five monitoring stations with three replicates in time along the river. the concentration of cr, pb and cd in both water and sediment samples were measured with graphite furnace atomic absorption sp...

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