Sun Lake is located in the middle and lower reaches of the Yangtze River, and it is also the 1 largest freshwater lake in China. The lake area is about 4 125 square kilometers. Because of the siltation and reclamation around the lake, the area of Panyang Lake has shrunk, and the water flow of Panyang Lake has also begun to decrease. Over the years, due to the protection of ecological policies, the lake area will be restored, but there are still some other reasons that affect the lake area. This time, Poyang Lake entered the dry season ahead of schedule, mainly because of more climate. The water level of Panyang Lake has changed, and the size of the lake has also changed, which is mainly due to some uncertain factors brought by monsoon climate.
Judging from some changes in a year, the climate in most areas of the Yangtze River basin belongs to subtropical monsoon climate, with abundant precipitation in summer. This time is the feng shui season, and there is little precipitation in winter, which is also called the dry season. Every summer, because the summer monsoon from the ocean will bring a lot of water vapor, there will be abundant precipitation at this time, and the water level of Panyang Lake will continue to rise, thus entering the rainy season in summer.
As soon as the rainy season is over, the quality of the precipitation in this pot will decrease, so there will be less water in the great lakes and the water level will become lower. Generally, it will enter the dry season in June 5438+10, and the water level of the lake will continue to decline in August this year. According to the relevant records, it can be found that the main reason is the prevalence of subtropical high, and the downward precipitation is less, and it feels particularly hot this summer, and the evaporation of water vapor is relatively large and the precipitation is less, so Panyang Lake enters the dry season ahead of schedule.