The primary difference between seawater and river water lies in their salt content, or salinity. Seawater contains significantly more dissolved salts than river water.
Here's a more detailed breakdown:
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Salinity:
- Seawater: Approximately 3.5% dissolved salts by weight (35 parts per thousand).
- River water: Approximately 0.012% dissolved salts by weight.
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Composition: While both contain various minerals, seawater's composition is relatively uniform globally, whereas river water composition varies widely depending on the geology and environment of its drainage basin.
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Density: Due to the higher salt content, seawater is denser than river water. The average density of ocean water is about 2.75% greater than that of typical river water.
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Taste: Seawater tastes salty and is undrinkable without desalination, while river water generally tastes fresher (though it may still contain impurities).
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Uses: Seawater, unless desalinated, is unsuitable for drinking or irrigation. River water is a crucial source for both, although it often requires treatment.
| Feature | Seawater | River Water |
|---|---|---|
| Salinity | ~3.5% (35 parts per thousand) | ~0.012% |
| Density | Higher | Lower |
| Composition | Relatively uniform | Highly variable |
| Taste | Salty | Fresh (but may be impure) |
| Common Uses | Marine habitats, industry | Drinking, irrigation, industry |
In summary, the significant difference in salt content, leading to differences in density and taste, is the key distinguishing factor between seawater and river water.
