The Anzhaoxin River, a 108-kilometer man-made river, was excavated in the 1980s in Daqing to discharge municipal sewage, industrial waste water and flood water from Daqing and most of the surrounding cities and counties. As China's requirements for water pollution control continue to rise, municipal and industrial wastewater needs to be treated at sewage treatment plants before it can be discharged into the river, and eventually into a tributary of the Songhua River two kilometers upstream from the Bajiahe pumping station. Why is the water quality of the whole Anzhaoxin River basin still worse than the five categories, or not up to the national standard?

The Anzhaoxin River, which flows through the southwestern part of Heilongjiang, is surrounded by a large amount of arable land, mainly rice. Tens of thousands of mu of paddy fields are irrigated by water flowing from the Anzhaoxin River. Because the water quality of the river has been poor, all parts of the basin have adopted strict sewage discharge measures and invested heavily in sewage treatment in the hope of improving the water quality. But strangely, the water quality of Anzhaoxin River has not improved significantly in recent years, and tens of thousands of mu of rice fields can only be irrigated with sewage. Why does this happen? Farmers say there are still places upstream where sewage is dumped untreated into the Anzhaoxin River.

Located in Zhaoyuan County, Daqing City, Bajia River is a shallow river with wetland characteristics, with a total length of 62 kilometers. There are not only more than 20,000 mu of fresh water cultivation on the river surface, but also more than 50,000 mu of rice irrigation by the river water of Baja River, but the river water of Baja River has been polluted for years, so farmers suffer greatly. The reporter came to an agricultural irrigation station, there are some accumulated river water, the water has become black, eight river on both sides of the more than 50 thousand mu of rice fields, over the years must be used to water the river, resulting in rice fields and rice is not the same as before.

The farmer said: "After pouring the rice will not grow, pull out the rice root is black, smell smell, the water is too serious pollution to the rice."

In 2017, local villagers sent soil from eight rice paddies to a third-party testing agency, which found excessive levels of the heavy metals cadmium and mercury. At the same time, the more than 20,000 mu of fishing ground in Bajia River is also often dead fish phenomenon.

In recent years, they have died every year. Now they can't raise much. In the first years, they could catch forty to fifty thousand jin of fish a year.

In addition to the frequent death of fish and the decline in fish production, the quality of the fish that survived also deteriorated.

Farmers say: "fish tastes like sulfur powder, just like the taste of caraway, you can't tell the fish taste, anyway, people can't eat, like grass, powder, pesticide taste."

The fishermen asked a third-party testing agency to test the water, which showed excessive levels of BOD, fluoride and the heavy metal cadmium. Why is the water of these eight rivers so seriously polluted?

Farmers said: "Daqing reservoir bubble water to directly pumped here, reservoir bubble water is just straight ditch, the floodgate down, this piece of pumping over, directly into the river."

The Bajiahe's only source of water comes from the Bajiahe pumping station, which in turn gets its water from a small tributary of the Songhua River. Less than two or three kilometers up the river from the pumping station, there is an Anzhaoxin river, the villagers said the reservoir bubble belongs to the Anzhaoxin. Reporters learned that every year in the spring, the river thaw, Anzhaoxin River sluice release water, become the main water source of the eight downstream river pumping stations. Villagers say that the Bajiahe River is polluted because of the poor water quality of the Anzhaoxin River. Is that so? What about the water quality of the Anzhaoxin River?

"The whole Anzhaoxin River basin is classed as inferior," said Liang Jian, a member of the Daqing Municipal Bureau of Ecology and Environment. "The water we discharge, which we admit and the state knows, is reported every year, is classed as inferior and does not meet the state's requirements, that's for sure."

The Anzhaoxin River, a 108-kilometer man-made river, was excavated in the 1980s in Daqing to discharge municipal sewage, industrial waste water and flood water from Daqing and most of the surrounding cities and counties. As China's requirements for water pollution control continue to rise, municipal and industrial wastewater needs to be treated at sewage treatment plants before it can be discharged into the river, and eventually into a tributary of the Songhua River two kilometers upstream from the Bajiahe pumping station. Why is the water quality of the whole Anzhaoxin River basin still worse than the five categories, or not up to the national standard?

Ecological environment of daqing city bureau of water ecological environment superintendent liu fact: the main problems of Ann ZhaoXinHe is complicated, first of all, it is a man-made pollutant discharging flood control main canal, the overall characteristics of the natural river, there is no net than the natural river sewage, combined with the daqing region is lack of water, so the whole watershed ecological water supply. Daqing petrochemical enterprises in early times, meanwhile, emissions and control standards are relatively low, early Ann ZhaoXinHe undertook the daqing petrochemical enterprises some drainage, in this case may have some big flood detention zone along the blisters sediment formed certain endogenous pollution, these comprehensive factors lead to Ann ZhaoXinHe at present water quality is not very desirable."

Daqing's environmental protection department said the entire Anzhaoxin river basin was not up to standard because of special historical and objective reasons. It is reported that in recent years, the Daqing city government has invested nearly 2 billion yuan to treat the Anzhaoxin River. The detection data shows that although it is still the poor five kinds of water, the concentration of the main pollutants has decreased. In order to fundamentally solve the pollution problem of Anzhaoxin River, we still need to invest heavily in comprehensive treatment.

The reporter found that the pollution problem of the Anzhaoxin River does have its particularity, but is it just because the investment is not enough that it does not reach the standard for years? Some residents told reporters that on both sides of the river, sewage is often discharged directly into the Anzhaoxin River. Sun Yang, deputy head of the inspection detachment, said there had been no theft in Daqing in recent years.

Is that true? The rainwater discharge outlet of the fourth rainwater station of Daqing Petrochemical Property Co., Ltd. The operation record of the workshop shows that they have not conducted rainwater discharge in recent one month. However, in the evening, the reporter found a surprising scene in the outlet: at 6 o 'clock in the evening, sewage from the outlet, sampled water has a pungent smell, the discharge of water eventually into the Donggan canal, which is part of the Anzhaoxin River. The next day, the operation record of the stormwater station showed that there was no record of any discharge the day before, so how could the stormwater outlet discharge the sewage?

Yu Hongbo, deputy director of Daqing Petrochemical Property Management Center, said, "There is no connection between the sewage pumping station and the rainwater pumping station. They are two different systems, including the outside pipe network. The stormwater pumping station goes down the street to the stormwater outlet, and the sewage goes directly from the sewer network to the sewage treatment plant. There are two systems, and the pipelines are different."

The left side of the rainwater station is the sewage pipe network, and the right side is the rainwater pipe network. Every year, about 1 million tons of sewage will be processed through the sewage pipe network, and the treatment fee of about 1 million yuan is needed. Sewage pipe network, rainwater pipe network is two systems originally, but in their middle reporter found a suspicious pipeline.

"This pipe is a waste line for rainwater," Yu said. "It's useless. It's useless."

However, as soon as the pipe valve was opened, a stream of pungent sewage flowed out, into the rain pool, and connected to the storm pipe network. China's "urban sewage into the drainage official website permit management measures" clearly stipulates: in the area of rainwater, sewage diversion discharge, shall not be discharged into the rainwater pipe network, the relevant competent departments know the existence of this pipeline?

"We don't know about this pipeline," said Li Zhiqi, deputy chief of the drainage department of the Daqing City Development Center. "The company didn't report it."

"It's the first time we've seen it today," said Liu Tao, deputy director of Daqing Longfeng District's ecological and environmental bureau.

During the interview, the reporter also found that some enterprises in broad daylight even directly to an Zhaoxin River discharge sewage. The sewage flows directly into Daqing Longfeng Wetland Nature Reserve, a provincial nature reserve in Heilongjiang. There are a large number of migratory birds in the wetland. There is a clear dividing line between the sewage and clean water after it flows into the wetland. Where does the sewage come from?

Liu Tao said: "This is part of the domestic sewage in Wolitun area, through the rain, not a regular sewage outlet, the flow of about 15 tons a day, sewage is not directly discharged without treatment, has been discharged for several years."

Water from the Longfeng Wetland flows into the Anzhaoxin River. Not far from the Longfeng Wetland is the Daqing Xinghua Park, where there is a drainage ditch. However, in April this year, the relevant authorities took samples from the main drainage channel for testing, testing results showed that the main pollutants in the water seriously exceed the standard. The sewage eventually flows into the Anzhaoxin River, and then into the Songhua River tributaries upstream of the Bajia River in April and May each year in spring.

"Sewage has to be drained so that it can be drained when the rainy season comes," says Liang Jian.

This is also the peak time for rice irrigation and the dry season for the tributaries of the Songhua River. In this way, sewage was pumped into the Bajia River, permanently polluting the 20,000 mu fishing grounds and more than 50,000 mu rice fields here.

Farmers say tens of thousands of acres of paddy fields have to be used with water from above. The problem of pollution caused by sewage from the Anzhaoxin River into the Baja River Basin has existed for many years, but until now, the problem of pollution in the Baja River Basin has not been solved.

The water quality problem of Anzhaoxin River Basin has a long history. In order to solve this problem, Daqing city has invested more than 2 billion yuan in sewage treatment in recent years. With great determination and a lot of investment, however, in some places, there is still a phenomenon of pollution control while stealing the discharge, which is thought-provoking. Treatment of water pollution is a systematic project, pollution control infrastructure construction is only on the one hand, with the hardware is not necessarily effective, but also need to discharge enterprises in accordance with the regulations, do not move crooked; Regulatory departments to enforce the law strictly, supervision in place. At the same time, river pollution is often related to local interests, when the pollution source and the damaged party are under different local management, it is often the phenomenon that the damaged party should take charge. How to set up the overall awareness, upstream and downstream joint management, governance, this is also a test of the management ability of the relevant departments.