Ca Mau has a system of rivers and canals interwoven and interwoven like a spider web with a total length of more than 7.000km, average density of 1,34km/km², total water surface area of ​​15.756ha, accounting for 3,02% of the area. natural areas of the province. There are many main rivers flowing into the West Sea (Gulf of Thailand) such as Bay Hap River, Ong Doc River, Trem Trem River, Cai Tau River, Bach Nguu River, and Dong Cung River. Among them, Bay Hap River is more than 50km long. Bay Hap estuary also has other names such as Go Cong estuary, Rach Cheo estuary connecting Ca Mau Cape (Ngoc Hien district). Photo: Hoang Giam.