نتایج جستجو برای: water pollution

تعداد نتایج: 604643  

2009
Xun Cao Aseem Prakash

This paper examines conditions under which domestic political institutions mediate the effect of trade competition on regulatory races in the environmental area. We focus on the role of domestic veto players in shaping governments' policy responses to trade competition which are reflected eventually in air (Sulphur dioxide, SO2) and water pollution (Biochemical Oxygen Demand, BOD) intensity lev...

Journal: :Environmental monitoring and assessment 2011
Nouho Koffi Ouattara Julien Passerat Pierre Servais

The Scheldt watershed is characterized by a high population density, intense industrial activities and intensive agriculture and breeding. A monthly monitoring (n = 16) of the abundance of two faecal indicator bacteria (FIB), Escherichia coli and intestinal enterococci (IE), showed that microbiological water quality of the main rivers of the Scheldt drainage network was poor (median values rang...

2011
Baojing Gu Yimei Zhu Jie Chang Changhui Peng Dong Liu Yong Min Weidong Luo Robert W Howarth Ying Ge

Human activity greatly influences nitrogen (N) pollution in urbanized and adjacent areas. We comprehensively studied the N cycling in an urban–rural complex system, the Greater Hangzhou Area (GHA) in southeastern China. Our results indicated that subsurface N accumulation doubled, riverine N export tripled and atmospheric N pollutants increased 2.5 times within the GHA from 1980–2004. Agricultu...

2016
Weili Duan Bin He Daniel Nover Guishan Yang Wen Chen Huifang Meng Shan Zou Chuanming Liu

Multivariate statistical methods including cluster analysis (CA), discriminant analysis (DA) and component analysis/factor analysis (PCA/FA), were applied to explore the surface water quality datasets including 14 parameters at 28 sites of the Eastern Poyang Lake Basin, Jiangxi Province of China, from January 2012 to April 2015, characterize spatiotemporal variation in pollution and identify po...

Journal: :Korea journal of population and development 1994
I K Kim

Korea's urban environmental problems, specifically air and water pollution, government environmental policies, and the role of nongovernmental organizations (NGOs) in protecting the environment are described and discussed. Korea's rapid industrialization and urbanization between 1961 and 1985 led to an increased volume of waste and air pollution. Automobiles increased in number from 29,234 in...

2015
Quan Wang Xianhua Wu Bin Zhao Jie Qin Tingchun Peng

Understanding spatial and temporal variations in river water quality and quantitatively evaluating the trend of changes are important in order to study and efficiently manage water resources. In this study, an analysis of Water Pollution Index (WPI), Daniel Trend Test, Cluster Analysis and Discriminant Analysis are applied as an integrated approach to quantitatively explore the spatial and temp...

Journal: :iranian journal of toxicology 0
معصومه آریایی masoumeh ariyaee department of environment, university of tehran, karaj, iran. امیرحسین حمیدیان amir hossein hamidian department of environment, university of tehran, karaj, iran. سهیل ایگدری soheil eagderi department of fisheries, university of tehran, karaj, iran. سهراب اشرافی sohrab ashrafi department of environment, university of tehran, karaj, iran. منوچهر خزایی manoochehr khazaee department of environment, university of tehran, karaj, iran.

background: anthropogenic activities release high concentrations of heavy metals into the aquatic ecosystems, which can be absorbed by the aquatic organisms. in this study, the accu-mulation of cadmium (cd) and arsenic (as) was compared in liver, gill and muscle tissues of toothed carp (aphanius sophiae) in fresh and salt water. methods: a total of 175 fish samples were collected from the shoor...

Journal: :محیط شناسی 0
علی جعفری دانشجوی دکتری برنامه ریزی محیط زیست، دانشکدة محیط زیست، دانشگاه تهران مسعود طاهریون دانشجوی دکتری مهندسی محیط زیست، دانشکدة محیط زیست، دانشگاه تهران احمدرضا یاوری دانشیار گروه برنامه ریزی و مدیریت محیط زیست، دانشکدة محیط زیست، دانشگاه تهران اکبر باغوند دانشیار گروه برنامه ریزی و مدیریت محیط زیست، دانشکدة محیط زیست، دانشگاه تهران

water quality trading is a new approach in pollution control which satisfies water quality standards suggesting minimum cost solutions. this method uses tradable discharge permits based on pollution transfer coefficient in a river. this paper tries to establish a water quality trading program in a river basin according to transfer coefficients between pollution sources and evaluate cost effecti...

2017
Xi Du Zhijiao Zhang Lei Dong Jing Liu Alistair G. L. Borthwick Renzhi Liu

Abrupt environmental pollution accidents cause considerable damage worldwide to the ecological environment, human health, and property. The concept of acceptable risk aims to answer whether or not a given environmental pollution risk exceeds a societally determined criterion. This paper presents a case study on acceptable environmental pollution risk conducted through a questionnaire survey car...

Journal: :Environmental monitoring and assessment 2011
Hafizan Juahir Sharifuddin M Zain Mohd Kamil Yusoff T I Tengku Hanidza A S Mohd Armi Mohd Ekhwan Toriman Mazlin Mokhtar

This study investigates the spatial water quality pattern of seven stations located along the main Langat River. Environmetric methods, namely, the hierarchical agglomerative cluster analysis (HACA), the discriminant analysis (DA), the principal component analysis (PCA), and the factor analysis (FA), were used to study the spatial variations of the most significant water quality variables and t...

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