Zhejiang | Province, China - Encyclopedia Britannica

Drainage

The chief river of the province is the Fuchun (Qiantang) River, the drainage basin of which constitutes two-fifths of the total area of the province. The river has in fact two headstreams: one coming down from the southwestern highlands and flowing through the broad Lan River valley and the other, the Xin’an, rising in Anhui province and passing through Jiande in Zhejiang and other cities. On the latter tributary is located the large Xin’an River Dam, an important supplier of hydroelectricity for the region. The Qiantang tidal bore takes the form of a high wall of water that rushes upstream with a thunderous roar. Best seen just after the full moon and at its highest in the autumn (late September–early October), the bore is a famed tourist attraction. Along the estuary are miles of sea dikes that have been built through the ages to protect the rich rice lands of the delta.

The other rivers of some importance are the Yong, Ling, and Ou; the Ou and its four principal tributaries together form the second largest river system of the province. Although these mountain streams flow swiftly through rocky channels and gorges, they are navigable to skillful boatmen using sampans (small, roofed boats propelled by sculling), right up to the mountains.

Hangzhou Bay is almost as broad at its entrance as the Yangtze estuary, but it is obstructed by a cluster of some 400 islands known as the Zhoushan (Chusan) Archipelago. The largest island in the group, Zhoushan, is a major coastal fishing centre. Mount Putuo (Putuo Shan) Island, just east of Zhoushan, is renowned for its scenery and as one of the four sacred mountains of Buddhism, which once attracted pilgrims from throughout East Asia.