What is it called when fresh water and salt water meet? | Yahoo Answers
Estuary: An estuary is a semi-enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the. When river water meets sea water, the lighter fresh water rises up and N.Y. The Algonquin Indians called the river Mohicanituk, “the river that. Inside the natural feature named estuary, an amazing phenomenon happens continuously, which is the interaction of river fresh water and the.
The idea is to idealizing the occurred tides at the offshore boundaries. The complexity of the mixing process in the estuary had also come from the upstream river discharge.Salt water meets fresh water
The river discharge variation during the flood and ebb period were usually been cut down. The inflow from the river, which is fresh water, usually can be presumed as constant flow to form a steady state simulation circumstance.
The simplification approaches in estuary modelling is not a false means if applied properly for a certain investigation purposes. It can be said that the simplification is one of the technical methodology alternative to understand some definite physical process characteristics Figure 2. The flood waters of Hurricane Floyd interaction in Palmico Estuary.
There are two parameters that can be observed in estuary modelling, which is the diffusivity parameter v and the scale scales for the exchange flow L. A recent research showed that the length scale L and diffusive coefficient are stronger related to tidal dynamics rather than to river inflows5.
The dependence of length scale L and diffusive fraction v is stronger with tidal mixing compared to inflows. Tidal wave and river inflow creates vertical mixing and stratification. This state indicates that estuarine circulation and salt flux have a stronger dependence with tidal mixing than inflows5.
What is the hazy water where fresh and saltwater meet called
However, it must be remembered that the inflows implied here is a constant inflow. It would be interesting to simulate dynamic inflow real flood hydrograph cases and interpret the coupling effect to estuary salinity state6.
The type of Estuary based on its salinity condition . The salinity gradient was affected by the river discharge on stratified estuaries but not on the well-mixed ones. The fresh water inflow can push and squeeze the salinity gradient, represented by the increase of the Du circulation and Ds stratification value5.
Where the Rivers Meet the Sea
In the area where there is nearly no stratification occurrence, the fresh water cannot pass the salinity gradient condition. It means that the river discharge do not have significant effect to the circulation and stratification processes.
The tidal mixing processes accelerate the vertical exchange mechanism that is casually weakening the gravitational circulation5.
Estuaries are also commonly used as fishing grounds, and as places for fish farming or ranching. Many, though not all, mangrove swamps fringe estuaries and lagoons where the salinity changes with each tide. Among the most specialised residents of mangrove forests are mudskippersfish that forage for food on land, and archer fishperch-like fish that "spit" at insects and other small animals living in the trees, knocking them into the water where they can be eaten.
Like estuaries, mangrove swamps are extremely important breeding grounds for many fish, with species such as snappershalfbeaksand tarpon spawning or maturing among them. Besides fish, numerous other animals use mangroves, including such species as the saltwater crocodileAmerican crocodileproboscis monkeydiamondback terrapinand the crab-eating frogFejervarya cancrivora formerly Rana cancrivora.
Mangroves represent important nesting site for numerous birds groups such as herons, storks, spoonbills, ibises, kingfishers, shorebirds and seabirds. Although often plagued with mosquitoes and other insects that make them unpleasant for humans, mangrove swamps are very important buffer zones between land and sea, and are a natural defense against hurricane and tsunami damage in particular.
Brackish seas and lakes[ edit ] Some seas and lakes are brackish. The Baltic Sea is a brackish sea adjoining the North Sea. Originally the confluence of two major river systems prior to the Pleistocenesince then it has been flooded by the North Sea but still receives so much freshwater from the adjacent lands that the water is brackish.
Because the salt water coming in from the sea is denser than freshwater, the water in the Baltic is stratified, with salt water at the bottom and freshwater at the top.
Limited mixing occurs because of the lack of tides and storms, with the result that the fish fauna at the surface is freshwater in composition while that lower down is more marine.
Cod are an example of a species only found in deep water in the Baltic, while pike are confined to the less saline surface waters. The Caspian Sea is the world's largest lake and contains brackish water with a salinity about one-third that of normal seawater.