我国的环境问题及现状（Environmental problems and current situation in China）.docVIP

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我国的环境问题及现状（Environmental problems and current situation in China）.doc

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我国的环境问题及现状（Environmental problems and current situation in China） Environmental problems and Countermeasures in China 1 water pollution is the most important water environment problem in our country According to the assessment of water resource quality of Ministry of water resources of the country more than 700 rivers about 100 thousand km long river development: 46.5% polluted river length (equivalent to class IV and V); 10.6% of the long river of serious pollution (exceeded grade V), water has no use value. More than 90% of the urban water pollution is serious. From the regional distribution, the water quality of the tributaries is generally inferior to the main stream. The water quality in the lower reaches of the main stream is generally inferior to the upstream, and the water quality in the urban and industrial sections is the worst. The water quality of the southern rivers is better than that of the northern rivers in general, and the water quality in the central and western regions is better than that in the eastern developed areas. In the seven major basins of China, more than 70% of the river reaches are polluted in Taihu, Huaihe and the Yellow River rivers. The pollution of Haihe River and Songliao River Basin is quite serious, and more than 60% of the polluted river reaches. 1/4 people nationwide drink water that does not meet sanitary standards. 2., lakes and rivers are shrinking and functional degradation, and some lakes are becoming more salty In the water shortage area of North China, because of the decrease of natural runoff and the increase of quoted water quantity, the exploitation and utilization are not reasonable, and the rivers stopped and the rivers in the plains have become a serious water environment problem. In recent 30 years, the surface area of lakes in China has shrunk by 30%. Known as the thousands of lakes called Jianghan Lake Group, the current Lake area is only 50% of the early days of the founding of new china. 3. a large number of