brackish

1. (of water) Salty or slightly salty, as a mixture of fresh and sea water, such as that found in estuaries.Examples: "...by a low courſe and too long ſporting with the briny Ocean it taſts brackiſh and inſalubrious..."; "1992, Joyce Carol Oates, Black Water, Penguin Books, paperback edition, page 4. On all sides a powerful brackish marshland odor, the odor of damp, and decay, and black earth, black water."; "2004, David Mitchell, Cloud Atlas, Random House. The water we took on at Chatham Isle is now brackish & without a dash of brandy in it, my stomach rebels."