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Prior to the public opinion has pointed out that if you do not pay close attention to planning the management of water pollution, strengthen water conservation, 10 years after the Yangtze River is likely to repeat the Yellow River and Huaihe River mistakes. On this background, January 5, 2016, General Secretary Xi Jinping held in Chongqing to promote the development of the Yangtze River Economic Zone forum for the development of the Yangtze River economic zone flag orientation. Over the past year, "a total of major protection, do not engage in large-scale development" concept enjoys popular support, adhere to ecological priority, green development, Yangtze River economic development strategy to promote.

Changes in environmental carrying capacity of the Yangtze River have occurred
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The Yangtze River originated in the southwest side of the main peak of the Latin Valley of the Tibetan Plateau, and flows through 11 provinces, autonomous regions and municipalities of Qinghai, Tibet, Sichuan, Yunnan, Chongqing, Hubei, Hunan, Jiangxi, Anhui, Jiangsu and Shanghai. 6300 km, ranking third in the world. The Yangtze River is the richest river in China, and the river runoff accounts for about 36% of the total river runoff.

In recent years, with the rapid economic and social development, the rapid population growth and urbanization speed, the Yangtze River water pollution increased year by year trend, "white pollution" has increased, "transfer pollution" endless, resulting in the Yangtze River Further deterioration of water quality, has affected the city along the river drinking water safety. Environmental experts worry that the state if you do not pay close attention to planning water pollution control, strengthen water conservation, 10 years after the Yangtze River is likely to repeat the Yellow River and Huaihe River mistakes.

Expert analysis, the main sources of pollution in the Yangtze River several aspects.

The first is the pollution of industrial wastewater and domestic sewage. Wastewater from industrial and mining enterprises and urban domestic sewage is one of the main pollution sources in the Yangtze River Basin. According to the State Environmental Protection Administration statistics, in 2004, the Yangtze River Basin wastewater discharge has reached 16.75 billion tons, of which industrial wastewater emissions of 7.66 billion tons, 9.9 billion tons of domestic sewage discharge; the main pollutant chemical oxygen demand total 462.88 million Ton, of which 1,349,800 tons of industrial wastewater discharge, urban sewage discharge of 3.279 million tons.

Followed by agricultural non-point source pollution. Agricultural non-point source pollution is another major source of pollution in the Yangtze River Basin, including: chemical fertilizers, pesticide pollution, livestock and poultry industry pollution, agricultural solid waste, rural domestic sewage and forest runoff pollution. According to the experts estimate that the current total amount of agricultural non-point source pollutants in the Yangtze River, and industrial, urban life and other sources of pollutants is basically the total amount of "one-third of the world."

As well as the surge in shipments to bring a large number of ship pollution. The Yangtze River is a transshipment of our countrys water transport artery, the shipping industry is very developed, perennial in the water operation of the ship has more than 210,000 ships, these ships each year to the Yangtze River emissions of oil and domestic sewage and sewage up to 360 million tons, 75,000 tons of domestic waste The In addition, due to maritime accidents caused by oil, chemical pollution incidents have occurred, the Yangtze River water environment poses a great threat.

Recently, from the Ministry of Environmental Protection, China Environmental Science Society learned that chemical oxygen demand (COD) and ammonia nitrogen is no longer the primary pollutants in the Yangtze River Basin, total phosphorus, nitrogen pollution leapt to the forefront of pollutants list. This shows that after decades of governance, the Yangtze River Basin industrial and urban pollution has been generally curbed, agricultural non-point source pollution has become the largest source of pollution in the Yangtze River Basin, fertilizer use bear the brunt of the use. Data from the Chinese Academy of Environmental Sciences, 2015, Chinas fertilizer use reached 60.22 million tons, an increase of 45% over 2000.

Environmental Protection Department of Water Environmental Management Secretary Zhang Bo, the past chemical oxygen demand and ammonia in the pollution list ranked first and second, and now these two indicators down, and phosphorus and nitrogen from the original secondary contradictions change Became the main contradiction.