The situation of water environment in China, the current situation of water pollution in China?

Among the groundwater monitoring points, poor to very poor water quality monitoring points accounted for the total.

Among the state-controlled sections of the Yangtze River, the Yellow River, the Pearl River, the Songhua River, the Huai River, the Haihe River, the Liao River, the Zhejiang-Fujian River, the Southwest Rivers and the Northwest Rivers, the cross-sectional proportions of the water quality of the -class, the cross-section proportions of the -class, the -class and the inferior class water quality are respectively9% and. The water quality of the Pearl River Basin, the Southwest River and the Northwest River is excellent, the water quality of the Yangtze River and the Zhejiang-Fujian River is good, the Yellow River, the Songhua River, the Huai River and the Liao River are slightly polluted, and the Haihe River is moderately polluted.

Among the 60 lakes (reservoirs) monitored, the proportion of lakes (reservoirs) in eutrophication state was and, respectively, the proportion of lakes (reservoirs) in mild eutrophication state and moderate eutrophication state were respectively. Among the 4929 groundwater monitoring points in 198 cities, the proportion of monitoring points with excellent-good-good water quality and the proportion of monitoring points with poor-very poor water quality is.

In 2012, a total of 387 centralized drinking water sources were monitored in 113 key cities for environmental protection across the country, including 240 surface water sources and 147 groundwater sources. The total annual water intake of key cities for environmental protection is 100 million tons, serving a population of 100 million people, meeting the water standard of 100 million tons, and the water quality compliance rate is an increase of one percentage point compared with the previous year.

The water quality in the coastal waters is generally average.

The water quality of Bohai Bay, Yangtze River Estuary, Hangzhou Bay and Pearl River Estuary is extremely poor.

According to the monitoring of the "In-depth Assessment of China's Environmental Protection Industry" by the Industry Insight Network, the proportion of seawater-like points is, the proportion of seawater-like points is, and the proportion of seawater points of inferior class is . Among the four major sea areas, the water quality of the coastal waters of the Yellow Sea and the South China Sea is good, the water quality of the coastal waters of the Bohai Sea is average, and the water quality of the coastal waters of the East China Sea is extremely poor. Among the nine important bays, the water quality of the Yellow River Estuary is excellent, the water quality of Beibu Gulf is good, the water quality of Jiaozhou Bay, Liaodong Bay and Minjiang River Estuary is poor, and the water quality of Bohai Bay, Yangtze River Estuary, Hangzhou Bay and Pearl River Estuary is extremely poor.

In 2012, the total sewage discharge of 425 industrial pollution sources, domestic pollution sources and comprehensive sewage outlets with a daily sewage discharge of more than 100 cubic meters was about 100 million tons. The total emissions of various pollutants are: 10,000 tons of chemical oxygen demand, tons of petroleum, 10,000 tons of ammonia nitrogen, tons of total phosphorus, kilograms of mercury, kilograms of hexavalent chromium, kilograms of lead, and kilograms of cadmium.

Water environment is the protection and utilization of six types of natural and social water environment factors, namely, runoff utilization, water ecological protection, water space utilization, water energy utilization, water security control, and water landscape utilization. Water environment planning is generally divided into basin water environment planning, regional water environment planning and urban water environment planning according to the planning scope, and the planning scope has different choices for the six basic objects. Mando era ecological water environment.

1. There is a lot of pollution in the dry and changed the river to the river. It is mainly polluted by cities and mining enterprises, and has become a pollution zone along the river.

2. Serious eutrophication of water bodies. China's major freshwater lakes are already polluted with eutrophication.

3. The suddenness of water pollution. At present, the water pollution in China is very frequent.

4. Water pollution control is lagging behind. The rate of failure in the city's sewage treatment is still low.

1. There is a lot of pollution in the dry and changed the river to the river. It is mainly based on the point pollution of cities and mining enterprises, and the traces of Chengtan along the river are turned into pollution belts.

2. Serious eutrophication of water bodies. China's major freshwater lakes are already polluted with eutrophication.

3. The suddenness of water pollution. At present, water pollution emergencies in China are very frequent.

4. Water pollution control is lagging behind. The city's sewage treatment rate is still low.

Summary. Dear, I'm glad to answer your <>

The causes of water pollution in China are mainly caused by pollutants produced by human activities, which include three major parts: industrial pollution sources, agricultural pollution sources and domestic pollution sources. Among the water pollution caused by human production activities, the water pollution caused by industry is the most serious. Such as:

Industrial wastewater, which contains many pollutants and complex compositions, is not only difficult to purify in water, but also difficult to treat<>

Causes of water pollution in our country.

Dear, I'm glad to answer your <>

The causes of water pollution in China are mainly caused by pollutants produced by human activities, which include three major parts: industrial pollution sources, agricultural pollution sources and domestic pollution sources. Among the water pollution caused by human production activities, the water pollution caused by industry is the most serious. Such as:

Industrial wastewater, which contains many pollutants and complex compositions, is not only difficult to purify in water, but also difficult to treat<>

Kinqin expansion: Water pollution refers to the change of chemical, physical, biological or radioactive characteristics of the water body due to the intervention of a certain substance, which affects the effective use of water, endangers human health or destroys the production environment, and causes the deterioration of water quality, which must be prevented. Water pollution refers to the amount of pollutants discharged into the water body that exceeds the background content and self-purification <>capacity of the substance in the water body

1. Learn to start from yourself, environmental problems need to start from yourself, and you need to start from the bits and pieces of life.

2. We need to protect water resources. Although everyone knows that water is an important resource in life, there are still cases of river water being polluted around us.

3. Less cutting and less cutting. Trees can purify the air, regulate the climate, prevent wind and reduce noise, and are the best health guards for human beings.

4. Actively participate in public welfare activities and strive to promote environmental improvement.

5. Don't throw domestic garbage into the river, and those factories should also strengthen management and don't discharge chemical raw materials into the river.

In China, 82% of the people drink shallow wells and river water, of which 75% of the water pollution is severely punished and bacteria exceed the health standard, and about 100 million people are polluted by organic matter. Tap water has long been considered safe and hygienic. However, because of water pollution, tap water is no longer hygienic.

According to a survey, as many as 2,221 chemical contaminants have been detected in tap water worldwide, some of which have been identified as carcinogens or carcinogens. From the point of view of the drinking standard of tap water, China is still at a low level, and tap water can only be processed into potable water by means of sedimentation, filtration, chlorination and disinfection. Chlorination of tap water can effectively kill germs, and at the same time, it will also produce more halogenated hydrocarbon compounds, and the content of these chlorine-containing organic compounds increases exponentially, which is the biggest cause of various gastrointestinal cancers in humans.

At present, the composition of urban pollution is very complex, in addition to heavy metals, polluted waters also contain a lot of harmful residues such as pesticides, fertilizers, detergents, etc., even if the tap water is boiled, the above-mentioned residues still cannot be driven away, and the concentration of harmful substances is increased in boiling water, the content of dissolved oxygen that is beneficial to human health is reduced, and also makes carcinogens such as nitrite and chloroform increase, therefore, the safety factor of drinking boiled water is not high. According to the latest information, at present, only 23 percent of the residents of China's major cities have drinking water that meets the sanitary standards, and the drinking water pass rate in small towns and rural areas is even lower. The top priority for water pollution prevention and control is to ensure that drinking water is qualified.

To this end, it is necessary to intensify the monitoring of water pollution and set up protection zones for water supply sources. The Yellow River, the mother river, was cut off for the first time in 1972 and stopped flowing for 226 days in 1997, drying up nearly 700 kilometers of riverbed. There are 300 tributaries of the Haihe River, and there is no river that is not dry, and no river is not smelly.

Groundwater in North China is seriously overexploited, forming the world's largest groundwater funnel area with an area of more than 70,000 square kilometers, with land sinking and seawater intrusion. Of the country's 668 cities, more than 400 have insufficient water supply and more than 100 are seriously short of water. Since the end of the nineties of the last century, the rate of desertification has risen to more than 3,400 square kilometers per year.

What is even more frightening is that China's total water resources are still declining. In 1997, the total was 2,785.5 billion cubic meters, while in 2004 it fell to 2,413 billion cubic meters. Since the 50s of the last century, more than 20 rivers in the upper reaches of the Yangtze River have shrunk on average.

On March 19, the World Natural Association released a report on the number of acres, listing the Yangtze River, which is the third largest in the world in terms of length and water volume, as one of the 10 major rivers facing drought in the world.

For more details, Izumi Huilai will learn more.