The problem that creates a great contrast lies in the fact that, for nearly 20 years, upstream counties and cities, including Bayannur, have discharged their domestic sewage, especially industrial wastewater, into the Wuliangsu Sea. But today, the Wuliangsu Sea is a public ****ing toilet for the Hetao Irrigation District and five upstream counties and cities.

According to the Bayannur Municipal Government commissioned by the Chinese Academy of Environmental Sciences and other units to prepare the "Uliangsu Sea Comprehensive Management Plan", "In recent years, the accelerated industrialization and urbanization of Bayannur City, brought about by industrial wastewater, urban sewage, as well as the large amount of agricultural water discharge of water withdrawal, resulting in the deterioration of the regional ecological environment, eutrophication and the trend of swamping is serious. "

Taking the figures of 2008 as an example, in that year the region discharged 23.312 million tons of industrial wastewater, 22.564 million tons of urban domestic sewage, 267 million tons of farmland drainage, and 26.701 million tons of breeding wastewater. The pollution source with the highest COD (Chemical Oxygen Demand) emissions in the region is industrial wastewater, accounting for 34.5% of the total emissions. The pollution source with the highest ammonia nitrogen emission is urban domestic sewage, accounting for 57.4% of the total emission, followed by industrial wastewater and livestock and poultry breeding wastewater.

Regional pollutant emissions have far exceeded the carrying capacity of the water environment of the Wuliangsu Sea. According to the local environmental protection department estimates, in 2008 the pollution load into the lake were 2292.65 tons of total nitrogen, total phosphorus 247.36 tons, while the Wuliangsu Sea water environment carrying capacity of only 722.3 tons of total nitrogen, total phosphorus 40.9 tons.

Bayan Nur Loop Water Group announced another set of data is more intuitive: each year into the Wuliangsu Sea water is roughly 350 million to 400 million cubic meters, of which 200 million cubic meters of domestic sewage and industrial wastewater, while the total capacity of the Wuliangsu Sea is only 320 million cubic meters.

According to the Bayannur City Environmental Monitoring Station from 2005 to 2010 monitoring information, the Uliangsu Sea environmental pollution and ecological degradation of the situation is grim, ammonia nitrogen exceeded the rate of 30.3%; serious pollution of the sediment, total nitrogen, total phosphorus and heavy metals exceeded the standard, the West Beach and the East Beach sediment pollution is the most serious; the species and number of fish has decreased dramatically, and the gradual loss of the function of the freshwater fisheries base.

Yellow River Water Pollution Incident

June 25, 2004, Inner Mongolia Hetao Irrigation District General Drainage Gully Management Bureau due to the water level exceeds the warning line to retreat, will be accumulated in the Wuliangsuhai downstream of the General Drainage Gully of about one million cubic meters of sewage, such as papermaking and other sewage concentrated in the drainage into the Yellow River, instantly caused the "6-26" Yellow River water pollution incident. Two days later on June 28, 10 o'clock, in the downstream of the Baotou City Water Supply Company closed the Yellow River water supply plant intake, until 19:45 on July 3, 2004, Baotou City, the Yellow River water supply plant to resume water, resulting in direct economic losses of more than 2.8 million yuan.

Environmental protection department of Inner Mongolia Autonomous Region identified in the aftermath of the water pollution incident on the Yellow River more than 400 kilometers of the river section caused 14 days of serious pollution, the water body completely lost the use of the function. 5 days of the water cut off, so that the city of Baotou suffered an economic loss of about 130 million yuan to more than 2 million Baotou citizens living and working impact can not be estimated. It was also the largest pollution incident to hit the Yellow River since the founding of the country, with 80 percent of wild fish dying in Yellow River waters near the source of the pollution.

In fact, the Wuliangsu Sea has turned into the largest storage pool of pollutants in western Inner Mongolia. What is even more worrying is that sewage from this area is still being discharged into the Yellow River through the inlet channel. If the pollution of the Wuliangsu Sea is not changed, the "6-26" Yellow River water pollution incident is likely to break out again.