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Questions tagged [rivers]

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101 views

Quotient farthest mouths/nearest sources

Much googling has not left me any the wiser, so here goes. Let FM be the distance between the mouths of two rivers X and Y. Let NS be the distance between the sources of the same two rivers X and Y. ...
4
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0answers
40 views

Dealing with uncertainty in source apportionment

I have a dataset of dissolved load (major and trace elements), the associated error is specified as <10% for all the cases, in the same way I have rock analysis (major and trace) with the same ...
2
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2answers
139 views

Do ice crystals form in running super-cold water?

Crystals of sugar form in hot saturated sugar solution as it cools down, due to excess sugar molecules not fitting in the solution and precipitating as crystals. In a similar situation, if we have a ...
6
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2answers
1k views

How far upstream would severe sea level rise (1m) noticably affect a large river?

The projection for sea level rise due to global warming seem to hover about 1m by 2100, let's use this figure. How far upstream would this noticably affect a large river, e.g. the Rhine? I think it ...
14
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1answer
126 views

Does Contwoyto Lake empty into both Bathurst Inlet and Chantrey Inlet?

Contwoyto Lake is a large lake in northwestern Nunavut. Descriptions of it say that its primary outlet leads to Bathurst Inlet. Does the lake also have an outlet that leads to Chantrey Inlet, ...
9
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1answer
189 views

Continental collision – evidence left of river mouths and estuaries along the boundary?

Are there any examples of now completely landlocked former river mouths or estuaries that became so after continental collision? As an example, consider the closure of the ocean between India and the ...
7
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2answers
351 views

Why is the Yarkant River braided in the Pamir mountains?

The formation section in the braided river Wikipedia says that very erodible soil causes braided rivers. Intuitively, a rising mountain range like the Pamirs would not be easily erodible. The ...
10
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2answers
1k views

Undersea riverbeds?

On a meandering bit of research through Wikipedia, I was looking at the Google Maps location of Texas Tower 4. South-east of that location there is what looks like a river valley under the ocean. If ...
13
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2answers
9k views

Do rivers/creeks flow underground when they dry up at the surface?

In my local area there is a creek which dries up completely in the summer and is flowing strongly in the winter. Is it the case that, at the location where the creek dries up, it continues flowing ...
9
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1answer
311 views

When calculating flood recurrence intervals, do you use annual instantaneous peak flows?

I would like to calculate the bankfull flow for a certain point on a river. The recurrence interval of bankfull flow varies for different rivers, but is typically always found to be between 1 and 2 ...
8
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1answer
2k views

What are Horton's laws?

Robert E. Horton coined these four laws: the law of stream numbers, the law of stream lengths, the limits of infiltration capacity, and the runoff-detention-storage relation. What are they ...
7
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1answer
123 views

How has river to ocean flux changed over the last 500 million years?

Do we have any rough indices of how this flux has changed? I'm particularly interested in knowing whether the flux was higher or lower during the time of Pangaea, or during the time of the unusually ...
11
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1answer
472 views

The river or the hills; which came first?

On the upper Mississippi in Illinois and southern Wisconsin, the river is bounded by hills and bluffs which define the outer edges of the flood plain. There are similar configurations for some of ...
11
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1answer
1k views

How old is Casiquiare canal?

Casiquiare canal is the world's largest bifurcation. Since such a large bifurcation seems unlikely to be produced and even less likely to stay for centuries, I wonder how old it is and why all the ...
25
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1answer
755 views

How can the following equations for meandering rivers be theoretically obtained?

It has been observed that the shape of a meandering river is roughly circular, not sinusoidal (Leopold and Wolman 1960). It has also been observed that the following mathematical relationships tends ...
7
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0answers
268 views

What's the contribution of different types of river sources? [closed]

There are different types of river sources, most people might think of springs, melting snow or glaciers, but other types of sources can include wet meadows or marshland. In terms of volume, what is ...
10
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1answer
1k views

How are minor tributaries of a river determined?

What are the criteria to determine if river A is a major or minor tributary to another River B? Is stream order the only deciding factor i.e. the highest order is the main stem, one less order is a ...
10
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1answer
592 views

What's the geological period of the birth of the river Ganges?

Avatarana or Descent of the Ganges (extracted from Wikipedia): "In late May or early June every year, Hindus celebrate the avatarana or descent of the Ganges from heaven to earth." There are ...
9
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1answer
59 views

Lab procedure for analyzing/assessing the presence of semi-volatile solids

I'm looking for a lab experiment design that shows how to measure the presence of semi-volatile solids in water (and not sludge or soil or solids). All I have found so far are chromotography/mass ...