长江中上游川江地区
chuanjiang region in upper and middle reaches of Y
川江中下游
main branches of Changjiang river in Sichuan
古川江和古峡江贯通
ancient Chuan River connected with ancient Xia Riv
江川灌区
jiangchuan irrigation area
龙川江楚雄城区段河道
river channel of the Longchuan River in the urban district of Chuxiong
龙川江流域
longchuanjiang river basin
longchuan river basin
longchuan valley