SCIENCE
ENVIRONMENTAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Narrow band of coastline that exists between high and low tide.
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Areas along the coast where fresh water from rivers mixes with salt water from the ocean.
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Flowing fresh water containing rapids.
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Freshwater aquatic areas that are saturated by water for at least part of the year.
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Detailed explanation-1: -An estuary is an area where a freshwater river or stream meets the ocean. In estuaries, the salty ocean mixes with a freshwater river, resulting in brackish water.
Detailed explanation-2: -An estuary is a partially enclosed, coastal water body where freshwater from rivers and streams mixes with salt water from the ocean.
Detailed explanation-3: -The term estuary is derived from the Latin words aestus (“the tide”) and aestuo (“boil”), indicating the effect generated when tidal flow and river flow meet. Estuaries are places where rivers meet the sea and may be defined as areas where salt water is measurably diluted with fresh water.
Detailed explanation-4: -Salt-wedge Estuaries They are also called highly stratified estuaries. Salt-wedge estuaries occur when a rapidly flowing river discharges into the ocean where tidal currents are weak.
Detailed explanation-5: -The mixture of seawater and fresh water in estuaries is called brackish water and its salinity can range from 0.5 to 35 ppt. The salinity of estuarine water varies from estuary to estuary, and can change from one day to the next depending on the tides, weather, or other factors.