Poyang Lake shrinks into the earliest record of the low -drying period

At 4 o'clock on August 19, the water level of Xingzi Station of Poyang Lake Station was retreated to 9.99 meters. It was the lowest water level in the same period since the record in 1951. Poyang Lake entered the low -drying period in advance. Following the earliest entry of the low water period (below 12 meters) on August 6, Poyang Lake once again refreshed the record of the earliest into the low -drying period (below 10 meters). In 2022, it also became the earliest year since the record of Poyang Lake in the lowest period of downturn since it was recorded in 1951. Many of its regions have become a "grassland".

Why shrink so seriously

On August 19, the Yangtze River and Poyang Lake in Hukou County, Jiangxi Province, the wide surface of the past became a large beach coating, and the channel became narrow. Feng Shui period is located in the mountain islands and the caves of the lower islands of Poyang Lake.

Yang Fan, the relevant person in charge of the shoe and mountain scenic spot in Hukou County, said that this landscape can only be seen in December each year. In August of the previous year, the ship can be directly leaned at the gate of the shoe mountain island, but now it can only be leaned on the lake beach. beside.

Why does Poyang Lake "shrink" this year, will it enter the dry period 100 days in advance? Experts from the Jiangxi Water Conservancy Department believe that it is the main reason for continuous high temperature and rain. The amount of water from the lake is 2.6 times the amount of water entering the lake, causing "incompetence".

In addition, the continuous high temperature makes the evaporation of the lake significantly greater than the precipitation. "At present, the water level of the Yangtze River and Poyang Lake is still declining, mainly due to the recent high temperature and rainy rain. Especially since July, the province's rainfall has been nearly 50 % less than the same period in the same period of previous years. Decreasing, resulting in mid -July, Poyang Lake decreased at a rate of more than 10 centimeters a day. At present, according to the meteorological department forecast, in the next week, Jiangxi will still be mainly high temperature and rainy weather. Ouyang Qing, the captain of the Hydrological Monitoring Brigade of Hukou County.

How much affects migratory birds and surrounding residents

Poyang Lake ushered in the dry period, but brought a lot of food to the summer migratory birds. In Poyang Lake Wetland, thousands of herons gathered in the lake area where the water retired, and the scene was extremely spectacular.

But what is worrying is that the summer migratory birds have eaten a lot of shallow water and creatures on the beach. What kind of impact will this rarely encounter on this year's winter migratory birds? What to eat for winter migratory birds?

Regarding the changes and impacts of Poyang Lake hydrological on biological resources, experts from the Jiangxi Academy of Sciences believe that the local residents should organize local residents to add soil around the depression to form dwarfs, excavate drainage ditches, build drainage gates, and form a dish -shaped lake.

Diber lakes account for 22.25%of the area of ​​Poyang Lake. Their role is to cut the water in the summer period in the summer to ensure the amount of water required for the water during the dry period of autumn and winter, and provide food for water birds. At this time, strengthening the water control management of dish -shaped lakes will alleviate the adverse effects of some drought.

Migratory birds need water, as well as the people in the surrounding people. It is reported that the Jiangxi Provincial Hydrological Department monitors and schedule the water source of water sources above 151 counties at or above the province, and timely and accurately evaluate the development of drought.

At the same time, Jiangxi Province strengthened water storage and water reservation, scientifically stopped the tail flood, and guided the reservoir to make a good water use plan based on the "one library and one policy" of the water supply object. Since July, small and medium -sized reservoirs have provided 1.8 billion cubic meters of water to ensure the need for crop irrigation. In addition, the Jiangxi Provincial Department of Water Conservancy conducts weekly dispatching of rural areas due to the difficulty of drinking water, strengthen the investigation of hidden dangers of rural drinking water, and guide 780 "thousand tons" water supply projects in the province to formulate and improve the emergency plan for water supply protection.

How to crack the normalization trend of dry water

In recent years, the water of Poyang Lake is "coming quickly, fierce, and lowering." The low water level has not caused a temporary impact of one or two years, and it has shown a normalization trend.

From 2003 to this year, Poyang Lake continuously appeared in low water levels, and some hydrological stations in the lake area even had the most deadly water level in the same period. Some years are continuously low -dirty, with more than 100 days, or even 254 days. Even in 2010 in Fengshui Nian, Xingzi Station of Poyang Lake appeared in 165 days of dryness.

The special investigation analysis of the design institute of the Yangtze River Water Conservancy Commission believes that the low -dry water level of Poyang Lake will become the norm in the future.

Dai Nianhua, a researcher at the Institute of Biological Resources of Jiangxi Provincial Academy of Sciences and vice chairman and secretary -general of the Provincial Ecological Society, believes that the advancement and extension of Poyang Lake's dry period is leading to the decrease in the area and biomass of the sinking water. Surgery communities are replaced by the community -type community, which will adversely affect snails, fish, winter migratory birds and porpoons. Experts believe that may consider using ecological engineering measures to strengthen the adjustment of the water level of Poyang Lake, cope with the normalized impact of drought and low water levels, and ensure production and life and ecological water.

Dai Nianhua suggested that the country, provincial, municipalities, and counties link to multi -party linkage to climate change issues, Poyang Lake ecological problems, aquatic biological and wetland migratory birds such as migratory birds, protective land construction issues, ecological compensation issues, lake shoreline renovation and ecological landscape creation issues. Adopt organizational expert team surveys, conduct on -site investigation, find the root cause of the problem, focus on both the symptoms and treat them, and implement scientific research, monitoring and ecological protection, construction, repair, and governance projects, increase the investment in protection, to promote the ecological Anlan, Poyang Lake ecology, Long -term stability.

(Reporter Wei Yichen)

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