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Why doesn't ocean water ever get diluted by fresh water rivers running into the oceans?
Wiki User
∙ 7y ago
Ocean water is diluted by the rivers. Probably the best example of this is where the Amazon river meets the ocean. Approximately 160km away from the mouth of the river Amazon, the ocean water is still fresh enough to drink. It probably doesn't taste very nice though. IN ADDITION: Volume. The amount of fresh water that flows into the ocean can be measured in parts per million. It doesn't have the volume needed to change the salinity of the ocean as a whole. It would be equivalent to adding one drop of food coloring to a swimming pool and trying to notice the difference later.
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Such dilution is local, but the ocean's salinity is by no means homogenous anyway. The water circulation is cyclic, with vapour from the sea being distilled water. Once it falls as rain or snow, it collects minerals from the rocks the rivers are eroding, helping maintain the sea's overall cocktail of dissolved salts. So the rivers have no real effect on the sea's saltiness overall, but if anything maintain it.
Wiki User
∙ 7y ago
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