Water pollution

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  • Water contamination and the degradation and destruction of aquatic ecosystems is a problem of truly global dimensions and impedes sustainable development in poor countries because there is no clean water; there are waterborne diseases; and there is pollution and the lack of sanitation. This chapter provides knowledge of water pollution and its prevention.

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  • Water is an important natural resource which forms the core of the ecological system. Human use of water depends on ambient water quality and human alterations of the landuse have an extensive influence on water quality. Water is typically referred to as polluted when its quality is adversely affected by contaminants and undergoes a marked shift in its capability to support the biological communities. The book is written for research scholars, hydrologists and environmentalists and especially students....

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  • Water pollution is a major global problem that requires ongoing evaluation and revision of water resource policy at all levels (from international down to individual aquifers and wells). It has been suggested that it is the leading worldwide cause of deaths and diseases, and that it accounts for the deaths of more than 14,000 people daily.

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  • Assessment of source of air, water, and land pollution - Part II : Approaches for consideration in formulating evironmantal control strategies.The environment is a combination of natural factors and social surrounds the outside of a certain system. They affect this system and identify trends and status of its existence. Environment can be seen as a set, in which the system is considered as a subset. Environment of a system is considered to be interactive with that system

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  • The Mekong River Delta (MD), the most downstream part of the Mekong river, is known as the biggest "rice bowl" of Vietnam. Currently, 2.4 million ha are used for agriculture. During the rainy season part of the Delta is flooded. Along the 600 kmcoast, the sea tide strongly influences the water quality by sea water intrusion. In addition, an area of 2-million ha is covered by acid sulfate soils. Also, the MD is very densely populated with intense associated water pollution.

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  • Tham khảo sách 'governing water', khoa học tự nhiên, công nghệ môi trường phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Despite the tremendous progress that has been achieved in water pollution, almost 40% of the U.S. waters that have been assessed by states do not meet water quality goals. About 20,000 water bodies are impacted by siltation, nutrients, bacteria, oxygen depletion substances, metals, habitat alterations, pesticides, and toxic organic chemicals. With pollution from point sources being dramatically reduced, nonpoint source pollution is the major cause of most water that does not meet water quality goals.

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  • In the United States industry is the greatest source of pollution, accounting for more than half the volume of all water pollution and for the most deadly pollutants. Some 370,000 manufacturing facilities use huge quantities of freshwater to carry away wastes of many kinds. The waste-bearing water, or effluent, is discharged into streams, lakes, or oceans, which in turn disperse the polluting substances. In its National Water Quality Inventory, reported to Congress in 1996, the U.S.

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  • Publication of this book is a milestone for the Water Supply and Sanitation Collaborative Council. It demonstrates the Council's unique capacity to bring together water and sanitation professionals from industrialised and developing countries to formulate practical guidance on a key issue of the day. Industrialised countries have extensive experience of the problems caused by water pollution and the strategies and technologies available to control it.

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  • Tham khảo sách 'committee on toxicity of chemicals in food, consumer products and the environment - subgroup report on the lowermoor water pollution incident', khoa học tự nhiên, công nghệ môi trường phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Economists have long advocated pollution taxes as a policy to improve water quality. One of the reasons water effluent taxes are embraced by economists interested in market-based policies is that sources of water pollution are varied and difficult to assess individually in terms of control costs. In principle, taxes overcome this problem. With a price—the tax—applied to pollution emissions, firms compare the price to their costs of emissions control. If the price is higher than control costs, they reduce emissions rather than pay the tax.

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  • Tham khảo sách 'control of water pollution from agriculture', khoa học tự nhiên, công nghệ môi trường phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • The recommendations and principles from Agenda 21 cover water resources management in general, i.e. including availability of water, demand regulation, supply and tariffs, whereas water pollution control should be considered as a subset of water resources management. Water resources management entails two closely related elements, that is the maintenance and development of adequate quantities of water of adequate quality (see Case Study V, South Africa). Thus, water resources management cannot be conducted properly without paying due attention to water quality aspects.

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  • Having identified and classified relevant water pollution problems, and having assigned priority to them, the next step is to identify appropriate interventions to cope with the problems. For every problem identified, therefore, an assessment should be made of the most appropriate means for intervention. Furthermore, an indication should be given of the relevant administrative level(s) to be involved. The proposed interventions may vary significantly in detail and scope.

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  • Over the past decade, pollutant trading has been suggested as an economical means to address some of the nation’ s remaining pollution problems. Recent amendments to the Clean Air Act, for example, specifically authorize air emissions trading. Trading’ s potential to reduce the cost of meeting point and nonpoint source water pollution standards has also received increasing attention in recent years. Under such a trading scheme, dischargers faced with differing costs for meeting...

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  • To understand the socio economic profile of fishing community and to identify various factors that affect the coastal environmental health and the livelihood of the fishing community a survey has been planned. The broad objective of the study is to examine the socio-economic conditions of the stakeholders in Ennore Creek; while the supplementary objectives centered on the analysis of the impact of water pollution & the creek environment on the health and income of stakeholders of Ennore Creek. Hypotheses of the study 1.

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  • This lab uses freshwater sponges as model organisms to examine the biological effects of water pollution. Specifically, the focus of this laboratory module is on the effects that chemicals of environmental concern (e.g., endocrine disrupters) have on sponge growth and development. Contamination of aquatic ecosystems is a serious issue in environmental science. Identifying which chemicals we should be concerned with, and determining the consequences of contamination by specific compounds, is a major area of current research.

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  • Water pollution is the contamination of water resources by harmful wastes or toxins. This type of pollution can be dangerous to animals and plant populations in and around lakes, rivers, polluted groundwater areas or oceans, and can pose major problems for humans as well. Although natural phenomena, such as volcanoes and algae blooms, can create drastic changes in water quality, water is typically deemed polluted only when impaired by human contaminants.

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  • In 1972, the Clean Water Act (CWA) delineated the basic structure for regulating discharges of pollutants into waters and for establishing quality standards for surface waters under the authority of EPA [10]. Under the CWA’s National Pollutant Discharge Elimination System program, stormwater permits were required for sediment runoff from construction sites and discharges of pollutants into surface waters [11]. The permitting system requires adoption of technology-based and water quality-based effluent limits [11,12].

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  • The deterioration of water quality in China seriously affects the inhabitants. For example, the residents in Chongqing and Guangyuan are suffering from diseases due to water pollution from industrial wastewater (Searchina 2004ab). Another serious problem is unsafe drinking water. According to Chinanet (2005), 300 million people in China cannot drink water which passes the standard for safe drinking, and some people in villages are suffering from diseases due to unsafe drinking water, like in Chongqing and Guangyuan.

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