What is the truth behind a large number of dead fish floating in Luojiagang, Qingshan, Wuhan?
1. There are a lot of dead fish floating in Luojiagang, Qingshan District, Wuhan. There are a lot of dead fish floating on the water, and the shore stinks. Most of the dead fish float on the shore, and some are covered by aquatic plants. Flies will bite these dead fish. There are hundreds of dead fish in the fishing net under a pier. The dead fish in the fishing net are transferred to other ships and then treated harmlessly.
Second, the truth behind it is that the water temperature has changed. The Sixth Brigade of Wuhan Environmental Protection Comprehensive Law Enforcement Detachment rushed to the scene and made an on-site inspection. No industrial or man-made pollution was found. The relevant departments have salvaged these dead fish and analyzed them. According to analysis, this fish comes from East Lake. Because of the change of temperature, there is a stress reaction, which leads to the fish dying of hypoxia. The sewage pipeline in Luojia Port has also been closed, causing no water pollution.
In fact, it is not uncommon for a large number of dead fish to be caused by changes in water temperature. For example, a northerly wind day or a rainy day with strong cooling is usually accompanied by low air pressure, which will lead to a drop in dissolved oxygen in water and a sudden drop in temperature.
Or in heavy rain, it is easy to cause the water temperature in the middle and upper layers of the pond to be significantly lower than that in the middle and lower layers. With the breaking of thermocline, the feces and residual bait at the bottom of the pond turn over to the surface water with the bottom water, which leads to the rapid increase of oxygen consumption or the rapid diffusion of toxins in the water, and finally causes the main cause of dead fish.
In addition, drastic changes in the weather will also lead to a large number of algae deaths, which will also lead to a large number of fish deaths. For example, before the arrival of typhoon weather, it is usually continuous high temperature weather, which makes algae in the water very easy to breed and flourish. Under the conditions of low pressure and sweltering heat before the typhoon, algae will die in large numbers. When these algae die, they will rot. The whole decay process needs to absorb oxygen from the water. Once the oxygen in the water is absorbed, a large number of fish will suffocate.