water is a valuable and irreplaceable element for the socio-economic development of countries. it is also the most important factor for the equilibrium of the ecosystem and environment. todays, several factors cause water problems and related issues around the world. governments and nations are always looking for the correct understanding of water issues and providing sustainable solutions to s...

background: survey of pollution and evaluation of water quality in rivers with oregon water quality index (owqi) and gis are effective tools for management of the impact of environmental water resources. the information in calculating the wqi of moradbeik river allowed us to take our tests results and make a scientific conclusion about the quality of water. gis can be a powerful tool for develo...

Environmental health and environmental quality issues along the U.S.-Mexico border have been of concern for several years. The enactment of the North American Free Trade Agreement and the presence of the maquiladoras (foreign-owned industries using imported raw materials) have intensified those concerns recently. Efforts to assess these issues are complicated by the fact that many of the issues...

The rapid economic and industrial growth of China, exemplified by a 10-fold increase in its gross domestic product in the past 15 years, has lifted millions of its citizens out of poverty but has simultaneously led to severe environmental problems. The World Health Organization estimates that approximately 2.4 million deaths in China per year could be attributed to degraded environmental qualit...

the issue of water resources and their effect on human life doesn't need any analysis and reasoning. however, such factors as population growth, improved quality of life and development of urbanization along with improved industrial and technological dimensions of human life have necessitated logical and reasonable planning for optimal use of water and water basins of the world. these fact...