洞庭湖位于湖南省北部荆江南岸。南有湘江、资水、沅江、澧水“四水”汇入；北有松滋、太平、藕池、调弦四口与长江相通，湖水最后在岳阳城陵矶注入长江（如下图）。洞庭湖示意图洞庭湖是第三纪末期、地层断裂后经过长期的缓慢下沉及江河冲积物的不断充填而逐渐形成的。古代的 Dongting Lake is located in the southern bank of Jingjiang in northern Hunan Province. The south has Xiangjiang, Zishui, Yuanjiang and Huangshui “four water” remittances; the north has Songzi, Taiping, Ouchi, four tuning lines connected with the Yangtze River, the lake finally into the Yangtze River in Yueyang Chenglingji (see below). Dongting Lake sketch Dongting Lake is the end of the Tertiary period, stratigraphic rupture after a long period of slow sinking and the continuous filling of rivers and alluvial gradually formed. ancient