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Salinity falls as the out flowing tide brings in more fresh river water.

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What best describes the change in salinity in an estuary at high tide?

At high tide, the salinity in an estuary typically decreases due to the influx of freshwater from rivers and streams that flow into the estuary. This dilution effect can lead to a brackish environment, where the salinity is lower than that of seawater but higher than that of freshwater. The mixing of saltwater from the ocean with freshwater alters the salinity gradient, resulting in variable salinity levels depending on the specific location and tidal conditions within the estuary.


What best describes the change in salinity in an estuary at high tide (as water enters the area)?

At high tide, salinity in an estuary typically decreases as freshwater from rivers and streams flows into the area, diluting the saltwater from the ocean. This influx of freshwater can create a stratification effect, where less dense freshwater overlays the denser saltwater. Consequently, the overall salinity levels within the estuary are lower during high tide compared to low tide when more saltwater is dominant.


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Related Questions

What best describes the change in salinity in an estuary at high tide?

At high tide, the salinity in an estuary typically decreases due to the influx of freshwater from rivers and streams that flow into the estuary. This dilution effect can lead to a brackish environment, where the salinity is lower than that of seawater but higher than that of freshwater. The mixing of saltwater from the ocean with freshwater alters the salinity gradient, resulting in variable salinity levels depending on the specific location and tidal conditions within the estuary.


What best describes the change in salinity in an estuary at low tide (as water leaves the area)?

At low tide, as water leaves the estuary, salinity typically increases. This occurs because the volume of freshwater from rivers decreases, reducing the dilution effect of freshwater on the seawater. Consequently, the concentration of salt in the remaining water becomes higher, leading to elevated salinity levels. Additionally, evaporation may also contribute to this increase in salinity.


What best describes the change in salinity in an estuary at high tide (as water enters the area)?

At high tide, salinity in an estuary typically decreases as freshwater from rivers and streams flows into the area, diluting the saltwater from the ocean. This influx of freshwater can create a stratification effect, where less dense freshwater overlays the denser saltwater. Consequently, the overall salinity levels within the estuary are lower during high tide compared to low tide when more saltwater is dominant.


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