Water pollutionWater pollution is a major problem in the global 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 An estimated 700 million Indians have no access to a proper toilet， and 1，000 Indian children die of diarrheal sickness every Some 90% of China's cities suffer from some degree of water pollution， and nearly 500 million people lack access to safe drinking In addition to the acute problems of water pollution in developing countries， industrialized countries continue to struggle with pollution problems as In the most recent national report on water quality in the United States， 45 percent of assessed stream miles， 47 percent of assessed lake acres， and 32 percent of assessed bay and estuarine square miles were classified as pollutedWater is typically referred to as polluted when it is impaired by anthropogenic contaminants and either does not support a human use， like serving as drinking water， and/or undergoes a marked shift in its ability to support its constituent biotic communities， such as Natural phenomena such as volcanoes， algae blooms， storms， and earthquakes also cause major changes in water quality and the ecological status of Causes of water pollutionThe specific contaminants leading to pollution in water include a wide spectrum of chemicals， pathogens， and physical or sensory changes such as elevated temperature and While many of the chemicals and substances that are regulated may be naturally occurring (calcium， sodium， iron， manganese， ) the concentration is often the key in determining what is a natural component of water， and what is a Oxygen-depleting substances may be natural materials， such as plant matter ( leaves and grass) as well as man-made Other natural and anthropogenic substances may cause turbidity (cloudiness) which blocks light and disrupts plant growth， and clogs the gills of some fish Many of the chemical substances are Pathogens can produce waterborne diseases in either human or animal Alteration of water's physical chemistry includes acidity (change in pH)， electrical conductivity， temperature， and Eutrophication is an increase in the concentration of chemical nutrients in an ecosystem to an extent that increases in the primary productivity of the Depending on the degree of eutrophication， subsequent negative environmental effects such as anoxia (oxygen depletion) and severe reductions in water quality may occur， affecting fish and other animal
1， to reduce water consumption: At present， China's water use， water resources are tight on the one hand， on the other waste are very Compared with the industrialized countries， many of our products unit water consumption is much Large water not only cause a waste of water resources and water pollution is caused by an important Through the technological transformation of enterprises， promote clean production and reduce consumption of water products unit， a water use， improve the utilization ratio of water to repeat， are in practice has been proven 2， the establishment of urban sewage treatment system: In order to control water pollution， development， industrial enterprises also must actively the problem of water pollution， particularly toxic pollutant emissions must be dealt with separately or With the industrial layout， adjustment of the layout of cities and urban sewage pipe network construction and improvement， the progressive realization of the focus on urban sewage treatment， urban sewage and industrial wastewater treatment 3， industrial restructuring: the natural water purification capacity is limited and reasonable industrial layout to take full advantage of the natural environment of the natural ability to change a vicious circle for a virtuous circle， a development of the economy， the role of pollution Guan， stop， and， to those water consumption， heavy pollution， pollution control companies with high To the water consumption of large agricultural structure adjustment， particularly in arid and semi-arid areas to reduce rice cultivation area， and take water-saving agriculture and sustainable 4， controlling agricultural non-point source pollution: agricultural non-point source pollution sources， including rural life， agricultural sources， livestock and poultry breeding industry， aquaculture To solve non-point source pollution than industrial pollution and sewage medium and large cities is more difficult， through comprehensive prevention and the need for eco-agriculture demonstration projects and other measures to 5， the development of new water sources: China's industrial and agricultural use of water and life saving potential of small， need to do a good job saving water， reducing waste， to reduce unit of GDP water The implementation of water projects， for ease serious water shortage in north China Shandong plays an important The construction of reservoirs， exploitation of groundwater， water purification， and so can ease the growing tension in the water pressure， but the construction of reservoirs， underground water exploitation， should give full consideration to the ecological environment and social 6， to strengthen the planning and management of water resources: water resources planning is the regional planning， urban planning， industrial and agricultural development planning a major component of， and other planning at the same Development must also be reasonable under the water supply and demand， a fixed water and surface water， groundwater， sewage and unified development and utilization of resources， to prevent depletion of surface water， groundwater level dropped， effectively rational development， comprehensive utilization， active protection， science管理
