tidewater
/ˈtaɪdˌwɔːtə(r)/noun
mass noun
1- water brought or affected by tides潮汐水面。
1.1
- US an area that is affected by tides, especially eastern Virginia〈美〉有潮水域地区（尤指弗吉尼亚东部）：
as modifier a large area of tidewater country.有潮水域国家的大片地区。