Pollution of river water, what are the causes of river water pollution? What should we do to allevia

The Yangtze River is the largest river in China, with beautiful scenery and many cities along the river. Nature has endowed the Yangtze River with abundant water, with an average annual runoff of about 1 trillion cubic meters, accounting for 36 percent of the country's total water resources. The main stream is a low-salinity river with good natural water quality, which is the source of life for the 400 million people in the basin and an ideal water area for the reproduction of aquatic organisms.

However, due to man-made reasons, the amount of sewage discharged into the Yangtze River has been increasing. There are about 3,000 major pollution sources in the upper reaches of the Yangtze River, and there are more than 100,000 industrial and mining enterprises of various types in the whole basin, mainly distributed in cities and towns along the Yangtze River, and the annual discharge of sewage is 15 billion tons, of which 10 billion tons are industrial wastewater, accounting for 42 percent of the total wastewater discharge in the country. The annual discharge of waste water from the main stream of the Yangtze River reaches 6.3 billion tons, ranking first among the seven major rivers in China.

Panzhihua, Chongqing, Wuhan, Nanjing, and Shanghai along the Yangtze River account for more than 80 percent of the total sewage discharge, and most of the sewage is directly discharged into the Yangtze River without treatment. More than 40 kinds of pollutants have been detected in the water body, mainly 1,800 tons of acid and cyanide, and about 1,630 tons of toxic metals such as mercury, chromium, lead and copper. In addition, more than 300,000 ships traveling to and from the Yangtze River are also a source of mobile pollution, and millions of tons of oily sewage and domestic sewage are discharged into the river every year, including nearly 10,000 tons of oil.

According to the investigation, the white pollution in the Gezhouba River section is serious, and in some places the white garbage has reached more than 1 meter thick.

Water pollution has greatly reduced the fish production in the Yangtze River, and the detection rates of 6666 and DDT in fish have reached 100 and 91, respectively. Water pollution has also caused serious losses in agricultural production, with farmland pollution in 1980 reducing grain production by 1 billion kilograms. According to the 1996 Annual Report on China's Surface Water Resources, the length of the second class water (good water quality) accounted for 28 of the total evaluated river length during the dry season of the Yangtze River Basin, 54 of the river length of the third class water (general water quality), and the fourth and fifth class water (polluted water quality). The wet seasons are respectively2％。

I think the one above is very good.

Preface: With the development of science and technology in China and the progress of the times, the country has undergone rapid changes, but behind this change, we should also pay attention to the consequences of the development of science and technology, which has caused serious pollution to the environment. It's not uncommon to see similar news on TV, such as a nuclear power plant leaking, or a river that is so polluted that fish are floating up.

It is nothing more than sad that we see such news, but what we should do more is to protect the environment and protect our homeland.

Nowadays, many nearby rivers are seriously polluted due to the construction of many factories. There are two main reasons for serious pollution in rivers, one is natural and the other is man-made, but I believe that man-made causes are the main causes such as river pollution. Because many factories do not meet the standards of wastewater, they are discharged, and the discharge is also put into nearby rivers.

Industrial wastewater is one of the most important sources of pollution in rivers.

Many factories of domestic wastewater have not experienced the strict investigation of relevant departments, and some industrial wastewater is not up to standard toxic water, non-purified water is discharged into the river, most of these wastewater are complex in composition, toxic, and have not been purified. This is a great pollution for nearby rivers and can cause the water in the rivers to deteriorate. Of course, in addition to industrial wastewater is a great source of pollution for rivers, domestic wastewater in our daily life is also a pollution for rivers.

Strengthen management, because in our daily life, many people will throw their own laundry water or some household garbage directly into the river. And these household garbage or laundry water, contains a lot of phosphorus, sulfur and bacteria. If there is river pollution, as a relevant department in China, we should strengthen the management of nearby factories.

The industrial wastewater must be purified and treated before it can be discharged into the river.

The main and direct cause of river water pollution is that pollutants directly enter the river water, such as industrial wastewater is discharged into the river without treatment, and domestic garbage is dumped near the river, which will cause serious pollution of the river water.

The mitigation measures are: through the interception of sewage, such as domestic sewage interception directly into the urban sewage treatment plant; **Supervise and strictly investigate the discharge of industrial wastewater; Tidy up and transform the river to remove existing pollutants, etc.

The main cause of river water pollution is the discharge of some polluted wastewater, as well as the random littering of some white garbage. The investment you should start with is to reduce the discharge of sewage or control the discharge of wastewater.

It is because a lot of pollutants are discharged into the river, and people often leave some garbage when they go out to play, and they do not pay attention to environmental protection, and often litter in the river, so it will lead to river water pollution. If we want to alleviate this problem, we must protect the environment when we go out, and we must take all the garbage we produce with us, do not leave it in the wild, and do not discharge sewage into the river in the factory.

This is due to the impact of vehicle exhaust emissions, and there are many factories that discharge some sewage into the river, so the river water is polluted. The relevant authorities must strictly supervise to prevent factories from discharging sewage into the river, and they should also set strict requirements and standards, and such behavior must be severely punished.

It is likely to be because of the discharge of industrial wastewater, or it may be caused by people littering everywhere, the first is to protect the environment, and usually do not litter, and there is also to carry out garbage classification.

1.Drawing on the experience of river chong control, the method of "lock group linkage" is adopted to jointly dispatch the canal water, increase the active water at the source of the canal, accelerate the flow of water bodies, increase the dissolved oxygen of water bodies, and enhance the self-purification and dilution diffusion capacity of pollutants.

2.Carry out the pilot project of river unblocking, remove the bottom mud of the canal, garbage and obstacles along the river, carry out comprehensive dredging and dredging, effectively reduce the release of ammonia and hydrogen sulfide and other odors by anaerobic fermentation of organic matter in the sediment, and at the same time ensure the smooth flow of water in the canal and avoid long-term detention of sewage in the canal. After the experience of the pilot project is obtained, it will be fully rolled out to comprehensively control the inland rivers in the city to ensure the effective elimination of the black and odorous phenomenon of river surges.

3.Control of industrial pollution. Vigorously rectify the key polluting enterprises in the river basin, and focus on the classification and rectification of key polluting enterprises in the river basin. Further deepen the pollution remediation of livestock and poultry breeding, prevent the breeding industry, and completely eliminate the pollution of the water environment by the aquaculture industry.

4.Strictly control the construction of new, expanded and renovated projects in the river basin. Projects with high energy consumption, heavy pollution and non-compliance with national industrial policies will not be approved.

5.Implement the pollution control and re-improvement project. All drainage enterprises in the basin that cannot stably discharge up to the standard and discharge pollutants that exceed the total amount control will be subject to pollution control and re-improvement projects, and 8 enterprises in the basin will achieve stable compliance by the end of the year.

Enterprises that do not conform to the national industrial policy and high pollutant emission concentrations and cannot stably meet the standards or have no hope of pollution control will be shut down in batches.

6.Speed up the construction of urban sewage treatment plants to ensure the normal operation of the project as soon as possible.

7.Waste pollution control. In 2005, all domestic garbage along the river was collected, transported and disposed of in a centralized manner, and the dumping of domestic garbage and construction waste into the river was strictly investigated and punished.

8.Strengthen the control of pollution in surface water sources. Actively develop ecological and green agriculture, and control the use of pesticides and fertilizers per mu below the provincial average.

The main manifestations are:

Environmental pollution has led to a sharp decline in aquatic life in some waters, extinction of aquatic life in some river sections or eutrophication of water bodies.

The extensive application of pesticides, fertilizers, and phosphorus-containing detergents has led to the extinction of certain aquatic species in the shed.

Natural disaster. Habitat has been altered and destroyed, resulting in the reduction or migration of aquatic species.

The construction of embankments around rivers and indiscriminate fishing have gradually reduced the types of aquatic sedan animals and made genetic resources.

Disappear in large numbers. Implement environmental protection and ecological construction to create good habitat conditions and biodiversity.

and the restoration of genetic resources.

1. Industrial wastewater is discharged into the river: mainly toxic and harmful substances.

2. Domestic sewage is discharged into the river: nutrients such as nitrogen and phosphorus are mainly responsible for eutrophication.

3. Farmland fertilizers and pesticides are discharged into rivers with rainwater runoff: half toxic and half eutrophication.

It is polluted by sewage and garbage.