What lake disappeared?

On average, 20 natural lakes die out every year in China, which has decreased by about 65,438+0,000 inland lakes in the past 50 years.

China is a country rich in inland lakes, with more than 2,300 lakes over 1 km2, with a total area of more than 90,000 km2.

Disappearing lake

1. Yunmengze

Yunmengze is a famous lake in ancient Jianghan Plain. Its orientation and size are one of the key and difficult issues in historical geography. Mr. Tan Qixiang believes that in the past, expanding the scope of Yun Mengze was mainly to confuse Yun Mengze with Yun Mengze. Don't you know that the former is a hunting area of the king of Chu and the latter is the name of a lake? Both of them are in the north of the Yangtze River, and there has never been a Yunmengze across the river. Cloud dreams have a wide range. It is a hunting park with mountains, rivers, mountains, plains and other landforms. It is about 800 miles from east to west and not less than 500 miles from north to south. Yunmengze is just one of the great lakes. Yunmeng has something in common with Shanglin Garden in Qin and Han Dynasties.

During the Qin and Han Dynasties, due to the sediment accumulation of the Yangtze River, the main body of Yunmengze has moved to the southeast, located in the south of Huarong County (now southeast of Qianjiang, Hubei Province). During the Wei, Jin, Southern and Northern Dynasties, Yunmengze was further reduced, and the south of Huarong County became land. Sun Wu and Jin Dynasty added Jianli County to the north of Jianli County, and the main water body of Yunmengze moved to the east of Huarong County and divided into many lakes. The famous ones are Dachan, Magu and Taibai Lake. During the Tang and Song Dynasties, Dayuan Lake and Taibai Lake were not recorded, while Magu Lake became a seasonal lake only when it flooded in summer and autumn. After the Tang and Song Dynasties, the most striking thing in Jianghan Plain was the formation of Honghu Lake. The name of Honghu Lake began in Ming Dynasty, but its rapid expansion occurred after the middle of Qing Dynasty. Due to poor drainage, Jianghan Plain has formed a new lake in the original depression.

2. Ouluze

Daluze, also known as Juluze, is another name with Guang 'a, Tai 'a, Dalu, Wochuan, Zhangjiabo, etc. It is a shallow marsh depression on the edge of alluvial fan of Taihang Mountain in ancient Hebei Plain. In Gong Yu, the phrase "precipitation in the north, as for the mainland" means that the Yellow River in the Warring States period also flows through this vast plain. At that time, the continental river was formed by the confluence of many rivers, with a vast area, so it was called one of the "nine major rivers". Located in the northern part of Julu County in Han Dynasty. Occupy some land in Julu, Pingxiang, Renxian and Longyao counties. In the second year of Daguan in Song Dynasty (1 108), the Yellow River North Sect burst its banks in Xingzhou, flooded Julu County and poured yellow water into inland rivers. This river burst and buried Julu County six or seven meters underground (Chapter 4 of Liang Qichao's China Historical Research Law), and the siltation thickness of mainland rivers will never be less than this figure. With the shallow siltation of the lake basin, the lake naturally moves to the low-lying areas, forming a new lake. Ningjinbo, south of Ningjin County, was gradually expanded after the mainland waters moved northward. During the Ming and Qing Dynasties, Ning Jinbo moved to Bei Bo, and the continental river in the northeast of Ren County moved to Nanbo, with the Mujiakou River in the middle, and the water from Nanbo flowed to Bei Bo. Later, due to the siltation of the Mujiakou River, the floods in the mainland ze area were serious. During the three years of Jiajing, Shunzhi and Yongzheng in Ming Dynasty, the river was dredged three times, and the water from Nanbo was injected into Bei Bo. Since then, the flood has decreased, but the continental river has existed in name only, leaving only a small pond.

3. Konosawa

I've said it before. Located in the northeast of Juye County, Shandong Province, it was injected by Jipu waters in ancient times and is also one of the "Nine Miles". The Han Dynasty was located in the north of Juye County, and was called "Yanzhou Qi". In the third year of Yuanguang in Han Dynasty (BC 136), the Yellow River burst in Zanzi (now southwest of Puyang) and poured into Juye River in the southeast, and Juye River continued to expand. In the fourth year of Jin Taihe (369), in the fourteenth year of Huan Wen (4 18), Emperor Wu attacked the post-Qin Dynasty, and all of them used Juye Ze to lead warships into the river. Liu said that "Juye Lake is vast, Zhuji in Nantong, and the old town of the old county is in Zezhong", indicating that Juye River is still expanding.

After the Tang Dynasty, the Yellow River silted up, because Liangshan became an isolated mountain in the lake, which was called Liangshan Bo in the Song Dynasty. Although the surface of the Yellow River is expanding, the bottom of the lake is rapidly silting up. Although the Yellow River moved southward in the Jin and Yuan Dynasties, it still injected water into the water margin when it flooded northward, and the water margin quickly silted up. In the fourth year of Yuan Dynasty (1344), the Yellow River poured into the water margin, and "after the river moved, it became flat". Eight hundred miles of water margin has finally become a thing of the past.