唐宋时期，洞庭湖号称“八百里”，正是全盛之时。在古云梦大泽消亡退化成的江汉平原上处处湖沼中，洞庭湖成为主体湖泊承纳着长江洪水。现在，“八百里洞庭湖”已日益名不符实了。洞庭湖在建国后不久就失去了中国第一大湖的称号。但它的水且仍是中国之最。从地图上可以看到， During the Tang and Song dynasties, Dongting Lake was known as “Eight Hundred Mile,” and it was at its peak. When the ancient Yun Yun Daze disappeared into the degraded Jianghan Plains, the Dongting Lake became the main lake to accommodate the Yangtze River flood. At present, the “Eight Mile Lake Dongting Lake” has become more and more faked. Shortly after the founding of the People’s Republic of China, Dongting Lake lost its title as the largest lake in China. But its water is still the highest in China. Can be seen from the map,