The farmer spring Water source is dirty or because the location is not good black suspended matter becomes mystery

21st Century Network following March 14 21st Century Network disclosed the "Farmer Spring a little hanging: in the water is now black unknown, March 25 21st century net in the farmer Spring Danjiangkou water point for the field investigation issued by the exclusive report" Farmer Spring Danjiangkou Water source staged "garbage siege" by the public opinion of the widespread concern. The farmer spring also responded to the report. However, the "black suspended matter" exactly why the material, the farmer spring has not yet shown the authority of the test results. Still said to contain the naked eye "black suspended matter" of the farmer spring in line with the standard, and in the water point "garbage siege" of the actual environment exposure, the farmer spring also said to the quality of water intake has no effect, said unclean area from the water intake downstream 1.4 kilometers. But actually, the truth, is this the truth? "1.4 km said" is not enough for the letter farmer Spring Gumbo 25th released a statement in response to the 21st Century Web report March 25, Farmers Spring issued a statement responded that the rubbish is located in the area downstream of the intake of 1.4 kilometers, does not affect the water quality. This statement is inconsistent with the fact that the 21st Century Network survey. The image below is the image of the red area above the surface distance from the water intake is only about 500 meters according to the regional satellite map can be seen, most of the garbage distance from the intake of the line is within 500 meters, the most recent less than 300 meters. From the 21st century network estimates, the so-called "1.4 kilometers", the department of Farmers Spring according to the current dry season water level calculation of the water point from the south of the garbage distribution area of the water distance. In fact, this algorithm ignores the impact of the impending rise of water level during the flood season. In the case of elevation, the water intake from the polluted area will be far less than the distance in the dry season. And even if the surface distance is calculated, the nearest eastern polluted area is only about 500 meters from the water inlet (see below), and the area is not "downstream" but "upstream". It is clear that the farmer spring response to the "1.4 km said" is not enough for the letter. At the same time, incineration is also used to dispose of garbage, and the toxic chemicals left behind by incineration will not penetrate the soil through rainwater, thereby indirectly endangering the water intake. Although the farmer spring in the statement admitted to the plant around the garbage pollution is responsible, but it hides an important fact: in the scene photos, the area's rubbish is not floating in the water, but piling up on the shore, this phenomenon shows that the garbage early last year, the water was already in the flood period, as the water level down in the dry season, the rubbish left on the shore. Therefore, in the period of about half a year, the farmer spring did not take the rubbish everywhere the effective clean-up action, suffice to explain its weekday lacks to the water source area surrounding environment attention, neglects its to the drinking water safety responsibility. And for the "Quality Gate" incident fuse-"black suspended matter" is what substance, still no answer, so far from the incident has been reported for the first time more than half a month. The site is located in the river downstream adjacent to the dam easy to absorb pollution in addition, the 21st century network found that the farmer Spring Hu Jia Ling factory In fact, from the Danjiangkou Reservoir area is still a distance,From the area of water, the water is more like the "River", and the site is located in the "S" type of river downstream, and extremely close to the Danjiangkou dam, such a geographical location in the objective to make the plant become an easy "filth" of the site. Mention of "reservoir", it is easy to associate with the "Endless" "placid" "unfathomable" and other adjectives. However, these words are used to describe the farmer spring Hu Jia Ling plant area of water but seems too far-fetched. In fact, the farmer Spring Hu Jia Ling plant is not built in the waters more extensive and calm Danjiangkou reservoir area, but is located in the water after the Dan River side. From the satellite map can be seen, the plant from the Danjiangkou Reservoir area is still about 10 kilometers away, the intake is actually located in the Hanjiang River and the confluence of Dan. From the scene photos can be seen in the factory shore can clearly see the other side, and on the satellite map, the distance between the two sides is less than 1000 meters. Although the water level in the area is improved by the relationship between the Danjiangkou Dam and the water flow is slowing down, it is difficult to call it "lake" compared with the main reservoir area of Danjiangkou Reservoir. Moreover, the Hu Jia Ling Water point is only about 1000 meters from the Danjiangkou Dam. This means that the water body of the area is susceptible to the impact of dam storage and water release, and therefore the quality of the main reservoir is not stable. However, pollution from outside is more worrying than the stability of water quality. Unfortunately, however, the location characteristics of the Hu Ling plant make it easier to invade upstream floating contaminants. First of all, the Hu Jia Ling Factory is located in the area just downstream of the sharp changes in the river channel, objectively make the floating from upstream easily stay near the plant. As can be seen from the satellite map, the River rivers in the Hu Ling area upstream of the "S" type of rapid turning. A geography researcher on the 21st Century network said that due to topography caused by the river to change direction, so that the water is blocked, easy to trigger upstream floating debris accumulation. Liu Chunyi, a professor of surveying and geographic information at Tongji University, told the 21st century network that there are many reasons for the accumulation of floating matter, the size of the curve and whether there is a shock reflux is also a factor, but the changes in topography and water are important reasons. From the geographical location, the farmer Spring Hu Jia Ling Factory is located in the "S" type of river downstream, and surrounding a lot of natural formation of the fjord, objectively for the upstream drift to provide shelter for the rubbish. Feng Dan, a special geography teacher at the Middle School of South China Normal University, also told the 21st century network that the flow of water was uneven at the abrupt turning of the river, and that the flow rate of the banks on the slow side would be prone to floating debris accumulation. Second, the plant is too close to the dam, making the rubbish accumulation more serious. The previous researchers told the 21st Century network, where the flow is usually blocked, it is easy to produce different levels of floating accumulation, the dam of the hydroelectric station is also listed here. Satellite images show that the Danjiangkou Dam is located not far downstream from the confluence of the Han and Dan Rivers, and the dam's spillway is lower than the surface, so it is easy to be a shelter for all kinds of floating objects around the dam. And farmers Spring Hu Jia Ling Factory, according to Danjiangkou Dam less than 1000 meters, such a geographical location may not be difficult to imagine, the plant below why there will be a piece ofLiving rubbish. has already chosen the Danjiangkou, the farmer spring but "roamed", abandons in the main storehouse area closer, the water body more stable upstream position constructs the factory, but chooses the downstream more apt "the filth" the dam mouth, such decision-making is quite puzzling.