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China's rivers are seriously polluted, and the discharge of pollutants is several times the carrying capacity

Release date: November 5, 2019 14:45:33

 

Living near water, choosing water and resting is the nature of human being close to water and nature since ancient times. Not every river will have a city, but almost every city will have one or several rivers. Today, we will pay attention to the rivers flowing around us.

"Ask the environmental protection director to swim in the river" was a hot topic on Weibo a few months ago. Whether we can swim in the river is not a standard water environment index, but it can directly reflect the problem. On September 7, the director of environmental protection really went into the water. Lanxi City, Zhejiang Province, held an activity of "protecting the mother river and enjoying the water of Lanjiang River". Fifteen directors and deputy directors of environmental protection, deputy mayor of Jinhua City, Secretary of Lanxi municipal Party committee and more than 1000 people went swimming in the river.

After a series of preparatory work, Ding Zheng, director of Jinhua Environmental Protection Bureau, took the lead in jumping into Lanjiang. Although he didn't have much experience in swimming, with a passion, Ding Zheng tried his best to skate in the swimming army. It took him more than 10 minutes to cross the 300 meter wide Lanjiang River.

In the past two years, more than 500 unlicensed processing workshops have been closed down in Lanxi, Jinhua. 66 seriously polluted projects have been closed down, and 213 polluting enterprises have been banned. This year, the water quality of Lanjiang River has reached three standards, which are suitable for the development of centralized drinking water, grade 2 protection area of water source, fishery and swimming area of aquaculture area. The water quality of Lanjiang River has been improved significantly.

The host of the swimming event, Shi Yanyong, director of Lanxi Environmental Protection Bureau, also took the lead in diving into Lanjiang, followed by 7 environmental protection directors and 8 deputy directors of the counties and cities along the Lanjiang River.

Shi Yanyong: Lanjiang can swim in the 1980s and before the early 1990s. This is the first large-scale swimming since the early 1990s. Lanjiang is the reserve water source of Lanxi City.

Shi Yanyong: the water from the upper reaches of the Lanjiang River has caused serious pollution to Lanxi river. People dare not go swimming because of the poor water quality.

Shi Yanyong: as an environmental protection department, we are duty bound to bear the responsibility. River management is a systematic project. The government should close down some enterprises and review the review, which also involves the large-scale rural breeding of the common people.

Shi Yanyong: this year is the first time to hold activities. I think through joint efforts, the water of Lanjiang River can be better and better. Now the common people's idea is to be able to return to the original situation, which requires years of effort.

In just 20 years, we have lost a clear river. How many more years will it take to make it go back to the past? But we have no answer. Urban river pollution is easy, but it is difficult to control.

Ma Jun, director of China Water Environment Research Center and author of China water crisis.

Ma Jun: since 2006, we have collected relevant water quality information and compiled water pollution maps. In the process, we have also received relevant water quality reports from Jinhua City. These environmental quality reports show that Lanjiang River is one of the best two rivers in Jinhua City. Other rivers like Jinhua River, Dongyang River and Nanjiang River are seriously polluted. At this stage, it is commendable to be able to make a swimming gesture, which is also a response to the hope of the people. But at the same time, we should also realize that there is still a lot of work to do to return to clean water.

Ma Jun: we often hear reports of river pollution. The river is full of garbage. The environmental sanitation department is responsible for the disposal of urban garbage. The agricultural sector also has a great responsibility. Water discharge may involve the water conservancy department, and the construction of some water conservancy projects will also affect the water quality. Therefore, many departments have responsibilities, and all departments should coordinate to solve this problem.

Investigation on pollution of urban rivers in China

In February this year, an entrepreneur in Ruian tweeted that the water pollution in Jinguang village, Xianjiang street, Ruian City was very serious. He was willing to offer 200000 yuan to the local environmental protection director to swim in the river. After being reported by the media, the matter has aroused wide attention from all walks of life. Now half a year has passed, what is the effect of river regulation?

Previous photos show that the river is seriously polluted, almost a garbage dump, and ordinary people really dare not swim in the river. After being reported by the media, the matter has attracted wide attention from all walks of life, and the local authorities have made great efforts to carry out the river regulation work.

Now, the garbage on the river has been moved out, and the pungent odor can't be heard at a glance. Illegal factories on both sides of the river have been banned. Moreover, the river course has been widened by more than two meters on both sides of the original foundation, the rock walls on both sides have been renovated, the original sewage pipes have also been changed, and signs of no dumping have been placed on the bank. Large oil drums floating on the river to collect sewage. Drainage channels are excavated on both sides of the river bank to filter and recycle the sewage, thus avoiding extensive sewage discharge.

It is understood that in the later stage of river regulation, garden corridors will be built on both sides of the river, and corridor bridges will be built on the river surface for passers-by to rest and visit.

The place where everyone used to stay away from garbage has become a good place for residents to stay away from.

The cyanobacteria crisis of Haihe River in Tianjin in July has not been completely cleared up

According to the latest environmental quality of the Ministry of environmental protection in the first half of the year, the water quality of Haihe River in Tianjin is seriously polluted, including Ziya River, Daqing River and other rivers flowing into Tianjin from surrounding provinces and cities. The water quality category is shockingly inferior class v.

In July this year, a cyanobacteria crisis broke out in the Haihe River in Tianjin. The whole Haihe River was covered with a thick layer of cyanobacteria. The Haihe River turned green as if it had been painted with green paint. From time to time, the River gave off a foul smell, and a large number of fish and aquatic organisms floated on the water surface after death. Although there are still many green particles floating on the shore of Tianjin this morning, when the Haihe River Station in Tianjin is under urgent control, many reporters still see the floating particles on the shore of Tianjin.

The waste of Yitong River in Jilin Province stinks everywhere

Yitong River in Jilin Province is the only river that flows through Changchun, the capital of Jilin Province. It was once an important water source of Changchun and was called mother river by Changchun. Once upon a time, Yitong River "trees on both sides of the grate, such as shuttle fish.". However, due to the rapid increase of population, the unlimited development of extensive agriculture and the serious shortage of water conservation resources, the Yitong River is in a state of dying and has lost its charm.

In the 1980s and 1990s, Yitong River began to become the discharge place of urban pollutants. Yitong River dam is more lush grass, garbage everywhere, the river is muddy, emitting a stench. Uncle Shen said that since then, Yitong River has become a bad River in people's hearts, a dirty river, a mother river that can't hate or love.

Uncle Shen: at that time, when it rained, there were no knees in the water and streets beside the Yitong River, and there were garbage, mud and grass. In summer, the odor, weeds, flies and mosquitoes are much older, which cast a shadow on the old people of Changchun.

As there is no diversion project of sewage and rainwater pipeline in Yitong River, the domestic garbage of surrounding residents, waste water of workshops and factories and industrial waste are directly discharged into the river channel, and the smell is bad. Especially in summer, residents on both sides of the Strait can't open their windows to sleep at all. The river course of that year left painful memories for residents on both sides.

In recent two years, Changchun City has decided to start large-scale implementation of the Yitong river reconstruction project.

The black river of Huai'an

At ten o'clock in the morning, everything is quiet except for the whistling of cars coming and going. The houses along the river are very old, and all the old people who live here are very nostalgic. They can't leave their hometown, their old houses and their old neighbors. Zhang Shikun, 82, has been living in a courtyard by the river around the city.

Zhang Shikun: I can fish by sitting in the yard. Some children can take a bath on the stone steps when it is hot at night. In the past, when the water was the clearest, the water could still be eaten. Take it home and put it in the water tank. Some families used alum to precipitate the sundries, while some naturally precipitated, so they could eat it.

However, decades later, the Huancheng river is no longer what it used to be. After many transformations, stone dams have been built on both sides of the river, and there are no stone steps for children to sit and bathe. In recent years, beautiful railings have been installed. As the river becomes more and more beautiful, the river becomes more and more ugly, from the original clear to blue, to green, and finally to black. If it doesn't smell like water for a long time.

Aunt Guo: in normal life, black water is OK, mainly from chemical plants and hospitals. The water is red and green. The smell of life is different from the chemical odor.

The water quality of Huancheng river is not only poor, but also has a great impact on the surrounding residents and even the students who come to jijialou primary school.

Aunt Guo: the dirtiest time, students will not go to school when they go to school, and they will not go to school when they go home.

Now more and more residents living around the Huancheng River have moved away from here and lived in the garden community. Only a lot of elderly people are still accompanying the river where they were born and raised. It is hoped that the relevant departments can continue to improve the water sanitation problems in the city and return the old Huai'an people a clean river around the city.

In most cases, Huaihe River belongs to four types of water, which can only be used for industrial use

Huaihe River is one of the seven major rivers in China. It flows through Henan, Hubei, Anhui and Jiangsu provinces, with a total length of about 1000 km. Its main stream is 431 km in Anhui Province and flows through Fuyang, Lu'an, Huainan, Bengbu, Chuzhou, etc. A few days ago, the reporter came to the entrance of Anhui section of Huaihe River to investigate. Wangjiaba in Funan County is the junction of the main stream of Huaihe River between Henan Province and Anhui Province. How about the water quality of the main stream of Huaihe River flowing into Anhui Province from here?

Ma Shikui: according to the monitoring results this morning, the water quality of Huaihe River belongs to four categories, which can only be used as industrial water. Although the COD index of potassium permanganate is 4.6 mg / L, which can meet the requirements of centralized drinking water for three types of water, there are more types of water under most conditions.

At the Jieshou seven ferry automatic monitoring station at the junction of Henan Province and Anhui Province, the first tributary of the Huaihe River, the reporter learned that the water quality of tributaries flowing into Anhui Province from the seventh ferry has not been very good.

Chen Mei: through the real-time data, we can see that the potassium permanganate index cod is now 9.46 mg / L, which belongs to the fourth class of water industrial water standard. However, from the historical data, we can see that from December last year to the end of March this year, there have been five types of water, and the water quality is very poor.

Ma Jun: in the middle of China's urban rivers, the pollution in the north is more serious. The north not only has a large amount of pollution emissions, but also is seriously short of water. Nearly 80% of the water resources in China are distributed in the Yangtze River Basin and the areas to the south. It is difficult to get clean water for large amount of discharge in the north, and the river pollution in the north is particularly serious.

Ma Jun: according to the announcement of the environmental protection department, the rivers in China are generally slightly polluted, but in some river basins, the pollution is particularly serious. The Haihe, Huaihe and Liaohe river basins have just been mentioned. The Songhua River Basin, including some tributaries of the Yellow River Basin, such as Fenhe River in Shanxi Province and Weihe River in Shaanxi Province, are in a state of serious pollution.

Ma Jun: the water quality in the south is generally better than that in the north, but after flowing through the city, many rivers are still seriously polluted. For example, in the Yangtze River, the Yangtze River has a large amount of water and has strong dilution and self purification capacity. However, the pollutants discharged from various places still pollute the Yangtze River. Almost 40% of the country's pollutants are discharged into the Yangtze River. Its tributaries have been seriously polluted, Taihu Lake, Chaohu Lake and flogging are in a relatively serious state of pollution.

Ma Jun: now the pollution situation has improved in some parts of the country, and the overall situation is still very serious. Some areas are even deteriorating.

Ma Jun: there are three problems that I am worried about. One is that the current emission is huge, which is far beyond the capacity of the environment, several times the capacity of our environment. The second point is the impact on health. We may identify the degree of river pollution from the sense. In fact, from a scientific point of view, it can detect a lot of harmful substances. These harmful substances are not ordinary pollutants, and even carcinogenic, teratogenic and mutagenic substances can be detected in river reaches, and some toxic heavy metal pollutants are often found Detection. Once the groundwater resources in northern China are seriously polluted, the third point is that the groundwater resources in China are seriously damaged.

Source: China Radio Network