Where does the Yangtze River water flow to Dongting Lake?

Writing/Zou Rong Photography/Zhang Yifei ★ Closely connected rivers and lakes. The Yangtze River water enters Dongting Lake from the "four ports" in Hubei, where it joins Hunan's Xiang, Qian, Yuan and Li, and finally flows out of Dongting Lake through Chenglingji and returns to the Yangtze River. "Jingjiang" is another name for the middle reaches of the Yangtze River, named after it flows through Jingzhou. From Zhicheng, Hubei to Chenglingji, Yueyang, Hunan, the total length is 337 kilometers. Since ancient times, there have been water intake points on both sides of Jingjiang River. According to historical records, before the Eastern Jin Dynasty, there were 16 acupoints on the north bank and 10 acupoints on the south bank. The Tang and Song Dynasties were known as "nine points and thirteen mouths", with six mouths in five points on the north bank and seven mouths in four points on the south bank. In the Yuan Dynasty, there were four points in the south and two points in the north. In the early Ming Dynasty, there were only two mouths left in Jingjiang River, with Haodong in the north and a mouth in the south. The Yangtze River water flows from these caves to Jianghan and Dongting Lake respectively. The distribution data of these caves also means that the water and sediment of the Yangtze River are "balanced" by Jianghan Lake Group and Dongting Lake Group in the middle section. Only in the Jiajing period of the Ming Dynasty, considering that the vast Jianghan Plain can produce greater economic benefits, a tomb of the Ming royal family was built in the north of Beijing. In the 28th year of Jiajing (AD 1549), in order to commemorate the 60th birthday of its female hair, Emperor Jiajing built the Wanshou Pagoda on Guanyin Rock in Shashi. As a result, Hao Cave, the last cave on the north bank of Jingjiang River, was blocked. During this period, only Taipingkou (Hudukou) and Tiaokou were left after the south point was continuously silted up. Taipingkou, inferred from Jingzhou government records, existed in the later Han Dynasty. By answering Song Renzong's sentence, "Cross-strait green poplar covers the tiger crossing", we can see that the tiger crossing existed in the Northern Song Dynasty; The tune mouth was formed earlier, and Tong Mingzhi thought that "this mouth was opened by Du Yu in the Western Jin Dynasty". The situation of the Jingnan couple lasted for about two or three hundred years. In the second year of Xianfeng in Qing Dynasty (1852), the lotus pond in Malindi did not stop, and in the tenth year (1860), the lotus pond river was flooded. In the ninth year of Tongzhi in Qing Dynasty (1870), the flood in Huangjiapu burst and the blockage was not firm. In the twelfth year (1873), it was decided again and rushed into Songzi River, and its Huangjiapu breach was called Songzikou. The situation of Jingjiang's "four mouths" flowing southward was thus formed. 1958, the suspension sluice was built, but it has not been opened yet, so there are only three southward flows in Jingjiang today. It can be seen that the formation, disappearance and existence of the north and south points of Jingjiang River is a process from nature to human intervention. Man-made intervention has changed from "dredging the north embankment in the south" to "saving the south and protecting the north", thus explaining the complex history of the middle reaches of the Yangtze River, a history that is worth singing and lamenting, and a history in which man and nature are entangled. Tong Hu' nan geology college