appropriate management it can be damaging to the environment .

Technically, brackish water contains between 0.5 and 30 grams of salt per litre--more often expressed as 0.5 to 30 parts per thousand (?), which is a specific gravity of between 1.0004 and 1.0226. Thus, brackish covers a range of salinity regimes and is not considered a precisely defined condition. It is characteristic of