 |
 |
Estuarine Science
Estuaries Classified by Water Circulation
Estuaries may be classified based on the way that layers of water are
formed within the estuary. Most estuaries have a range of salinity from
salty sea water to nearly fresh water. The saltier ocean waters are more
dense. Since the waters flowing into the estuary from land are less salty,
they float on top of the sea water when they meet. Some mixing also occurs
where the two water masses meet. Physical and environmental factors such as
the shape of the basin, tides, river flow, and wind determine how much the
water mixes. Estuary classifications based on water circulation include
salt wedge estuaries, partially mixed estuaries, well-mixed estuaries, and
fjord type estuaries.
(Image credits are listed in Image Index)
|
|
