ABSTRACT
Chengmai Bay is in the north of Hainan Island and is adjacent to Qiongzhou Straits. It starts from Tianweijiao in the east to Yubaojiao in the west (see Fig. 1). There are two lagoons in the bayhead, that is, Dongshui Lagoon and Huangchang Lagoon. In the two lagoons, Dongshui Harbor and Macun Harbor were constructed respectively. Dongshui Lagoon is 12 km long, 100 m ∼1000 m wide and −2 m ∼ −5 m deep. In the whole Chengmai Bay, the entrance of Dongshui Lagoon is only about 1 km away from −10 m isobath, hence, Dongshui Harbor possesses better conditions to be developed into a deepwater harbor of over 100000 DWT.
