半咸水（brackish water）是指含盐量在0.5‰-30‰之间的水。一般包括有河口区和大多数的内陆咸水湖。 我国青海湖是半咸水湖，世界上最大的半咸水水域是波罗的海。
渗析原理的应用是除半咸水中的盐。
The dialysis principle can be used for demineralization of brackish water.
主要栖于淡水，但有的种可降入半咸水甚至咸水。
Gars are confined chiefly to fresh water, though some species enter brackish or salt water.
本文报导了在半咸水池塘中梭鱼仔幼鱼的摄食习性。
Results on feeding habits of mullet fry in brackish water ponds applied withmunures for producing natural feed is obtaind.
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