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39 votes

Why are the Great Lakes not considered a sea?

"Sea" versus "lake" versus "just part of the ocean" is a bit fuzzy, but there are two things that are universal about seas: They are saline. They are either endorheic or have a sea-level (tidally-...
Mark's user avatar
  • 1,261
10 votes
Accepted

Lake outflow forming a "reverse delta"?

When the flow of water in a river accelerates, it can pick up more sediment from the river bed and transport it downstream. Alternatively, when the flow slows down, the transport capacity drops and ...
Camilo Rada's user avatar
  • 17.7k
9 votes
Accepted

Have russian drilling operations in lake Vostok succeeded yet?

The Russians did "succeed" to reach the water at borehole 5G-2 in 2012. However, the lake water flooded into the borehole due to overpressure, and refroze. They drilled again during the next campaign ...
Jean-Marie Prival's user avatar
8 votes

Why are the Great Lakes not considered a sea?

From a geological point of view, the two are very different. The Caspian Sea is thought to be the remnant of an ocean that got cut off from the ocean system (similar to how the Mediterranean might ...
Luaan's user avatar
  • 180
7 votes

Is there a lake whose sole source of water is rain and has a hole at the bottom draining it?

I think there is some misunderstanding of the water balance of a lake, or to put it differently, why some holes in the ground are dry while some are filled with water (known as lakes). The linked ...
user2821's user avatar
  • 5,946
5 votes

Differences between lake effect and ocean effect snow

Well, for one is the salination. The salt in oceans lowers the vapor pressure, lowering the evaporation rates (i.e. the salinated water is hindered from evaporating). Another is the amount of fetch. ...
BarocliniCplusplus's user avatar
5 votes
Accepted

Do lakes tend to have elliptical shapes more often than circular shapes?

I can think of six main types of lake regimes based on the environment in which they form and exist (this is a generalisation). In the comments to the question it is mentioned lakes in formerly ...
Peter Jansson's user avatar
4 votes

Why are the Great Lakes not considered a sea?

Other answers have suggested some ways of classifying things into seas or lakes, which are good guides, but inevitably there are exceptions to all of them. Ultimately, the difference is not an ...
Semidiurnal Simon's user avatar
4 votes
Accepted

Why are there so many "horseshoe lakes", and are they really mostly in the US?

Let's get rid of a red herring from the Wikipedia page linked to in the question! Horseshoe Lake, Arizona - is a reservoir created by the Horseshoe dam. Nothing to do with actual horseshoe lakes. The ...
Fred's user avatar
  • 24.7k
4 votes
Accepted

Are Fluvial and River Terraces the same?

In English, the word fluvial comes from the Latin word for river. Fluvial processes are processes associated with rivers or streams and the deposits and forms created by them. River terraces and ...
Fred's user avatar
  • 24.7k
3 votes

How do you estimate the depth of a lake?

You may as well ask if you stand on the coast of east Africa, the Arabian peninsular, Iran, west coast of India, or the southern tip of India, the west coast of Sumatra, the east coast of Madagascar, ...
Fred's user avatar
  • 24.7k
3 votes

Is Oregon lake extremely pure water? If so, why?

The visibility or "clearness" is more a matter of suspended particulates, and organic material such as algae, than of dissolved material. For instance, runoff from glacial streams can be nearly ...
jamesqf's user avatar
  • 1,758
3 votes

Why is my pond / lake melting when the temperature is still far below freezing?

My guess is that since ice (and the liquid water underneath it) is much better at absorbing thermal radiation than air, then even if the air temperature is below zero, the ice can heat up in the sun ...
bon's user avatar
  • 2,211
2 votes

How stormy (wave height) does Lake Baikal get?

An article here says 4 meters. (No statistical data however, just a general information page) Waves on Lake Baikal may reach a height of 4 meters. Sometimes they evaluated as 5 and even 6 meters, ...
justCal's user avatar
  • 1,186
2 votes

Is Oregon lake extremely pure water? If so, why?

The lake is very clean and pure by the standards of some other lakes, but there are bound to be some harmless and beneficial impurities in there. The plants couldn't grow unless there was plenty of ...
Michael Walsby's user avatar
2 votes

Is Oregon lake extremely pure water? If so, why?

I believe the lake shown in the YouTube video Adventure Oregon - Lost Lake draining into a giant hole is the exact same lake. That is incorrect, and that incorrect hypothesis resulted in a lot of ...
David Hammen's user avatar
  • 23.7k
2 votes

What was the size of the Aral sea in year 1000 CE?

Before the 1960s, the size of the Aral Sea was relatively consistent. However, the Aral Sea went through some "dry spells" during the 1st and 3rd centuries BCE. Going even further back, the ...
A Salamander's user avatar
1 vote

How do you estimate the depth of a lake?

IF (a big if) you can see enough local topography to estimate the underwater slopes, you can get some likely bounds. If the lake had filled yesterday, projecting the slopes on either side until they ...
Rockdoctor's user avatar
1 vote

Before the artificial changes of the Aral Sea, what was its average depth and salinity?

From the link provided by Keith McClary, the Aral had a salinity of about 1% and a max depth of 69 m. (Could not find average depth in the article.) The Caspian Sea, on the other hand, has a salinity ...
DrZ214's user avatar
  • 2,175
1 vote

How to deal with a pond silting up

Obviously removing the silt will increase the erosion along the banks of the pond(the neighbors will probably not like this). It sounds to me like this pond is badly constructed if the erosion is ...
trond hansen's user avatar
  • 1,888
1 vote

How to deal with a pond silting up

Cut a notch into the dam so the water drains to the level you want. The marsh will shrink to a smaller size.
haresfur's user avatar
  • 4,419
1 vote

How to deal with a pond silting up

That is what lakes and ponds do , fill with silt. Serious earth moving equipment is needed to slow Mother Nature. Our community has recently removed some silt with draglines, bulldozers , trucks , etc....
blacksmith37's user avatar
  • 1,043
1 vote

Results of large woody debris in river/lake

Ecosystem benefits of submerged trees include providing growth locations and nutrients for algae, phytoplankton, molusks, and other organisms. They can provide, not only protection for fauna, but ...
haresfur's user avatar
  • 4,419
1 vote

Results of large woody debris in river/lake

Depending on the fauna within the rivers and lakes, submerged trees can be like reefs in oceans. They provide protection for fish and other fauna and they can also act as nurseries for certain types ...
Fred's user avatar
  • 24.7k

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