#头条创作挑战赛 #
The 41 degrees Celsius heat is unbearable enough, but what if you add to that the smell of millions of dead fish spanning tens of kilometers?
Oops, the nose began to "hallucinate smell" and felt sour.
Millions of dead fish have been found in a river in Australia
The "Dead Fish Wall", which spans tens of kilometres, runs along the Darling-Barca River near the town of Menindi.
Since March 17, a large number of fish killings have been reported near towns in western New South Wales, Australia, and it is estimated that the number of dead fish may be in the millions.
The NSW Department for Primary Industries said on Friday that the cause of such a bizarre event was clear; There have been many extreme floods in the region, and when large amounts of nutrients and organic flow into the river, oxygen is drawn from the water, while herring, carp and the like seize the opportunity to increase in the river; But hot weather followed, the water level dropped, could not afford such a large number of fish, and the high temperature caused the oxygen in the river to be depleted, so there was such a large-scale fish death.
It is reported that such incidents have occurred three times since 2018, but this time it is the most serious, or more serious than one time.
Professor Fran Shelton of the Australian Rivers Institute at Griffith University believes that if it is not cleaned up in time, the situation will worsen because as the fish begin to decay, the oxygen in the water will be further depleted; The resulting pollution will further affect the surviving organisms in the river.
The millions of dead fish are moving downward, and authorities say any attempt to clean up the decomposing carcasses will be "futile" because the number of dead fish is so outrageous, and they hope local water birds will help dispose of some of them.
But you can't rely on water birds, right? How to deal with it?
About how to deal with it
Experts suggest that releasing ambient water downstream could help stem the spread of poor-quality water, while upstream official regulators should consider limiting the amount of water used for irrigation to restore the system.
Professor Lee Baumgartner, a fish ecologist and member of the review team, said mass fish deaths could become the norm if left unaddressed. He suggested that departments improve their operational strategies so that state and federal agencies can respond more quickly to potential fish killings.
Looking back at the 2018-19 period, the climate in western NSW has changed significantly, and the transition from drought to flood to drought is happening faster than ever before. And the Australian Bureau of Meteorology says there is a 50 per cent chance of El Niño by the end of the year, which increases the risk of hotter and drier weather in the southeast of the country.
NSW Greens MP Cate Faehrmann said fish deaths were an "existential threat" to river health and community water security and it was an absolute disaster, whether it was the result of receding floodwaters or poor water management, it was time for NSW and the federal government to act now to clean up millions of rotting fish across kilometres of rivers.
Dr Simon Banks, a spokesman for the review panel on the incident, said: "Native fish killings of this magnitude are devastating. Federal agencies have been supporting NSW in responding to this serious fish killing, including providing water to the environment and doing everything we can to improve water quality. ”
The spokesperson said the timing, scale and location of the clean-up plan had been "adjusted to the circumstances and local recommendations." However, effectiveness depends on agencies continuing to monitor the situation and, where possible, reacting to the situation.