Skip to main content

Questions tagged [rivers]

This Tag is for Questions about Rivers and why/how they operate in a certain way, or if the Question talks about a subject or point that revolves around Rivers, streams and et cetera.

26 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
6 votes
0 answers
270 views

Estimate the flow velocity of a river with satellite images

I'm looking for a more or less straightforward (and not very mathematical) way to roughly estimate the flow velocity of a river based on satellite imagery (e.g. Google Earth). In more detail: I would ...
Stockfisch's user avatar
5 votes
0 answers
77 views

Surprisingly deep rivers

I just read that the Congo River is >200m (650 ft) deep - I had no idea that this is even remotely possible! Q1: What are the processes leading to a river being this deep? Q2: By which method is ...
NotTheMoney's user avatar
5 votes
0 answers
43 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 ...
Marlon Calispa's user avatar
4 votes
0 answers
188 views

Ice on rocks at bottom of flowing river

I live near a river in the Pacific NW (USA) and it has been cold (low teens °F, around -10°C) for over a week. The river is about 5-6 feet (1.5–1.8 metre) deep and moving fast enough so the river at ...
Stevan V. Saban's user avatar
4 votes
0 answers
44 views

Why is the delta part of Jezero crater higher than the surroundings?

In images of Jezero crater on Mars, it looks like the delta fan is higher than the surrounding crater floor. This indeed seems to be the case with closer-up images from the Perseverance rover taken ...
usernumber's user avatar
4 votes
0 answers
141 views

How does the estaurine turbidity maximum vary depending on the type of estuary?

An estuarine turbidity maximum (ETM) is the area of an estuary that has maximum values in suspended particles in the water column. My questions are What are the main characteristics of the ETM? How ...
arkaia's user avatar
  • 15.5k
4 votes
0 answers
401 views

What is the biggest periodic river?

What is the biggest and longest periodic river in the world ? (river that runs dry on occasion and flows during a season of heavy rain)
Sprotz's user avatar
  • 41
3 votes
0 answers
181 views

Causes of high calcium levels in sandy alluvial soils

When soil calcium is high: High levels of soil calcium may be expected when there is substantial calcium carbonate bedrock from which the soil has weathered. Calcium levels can be high in agricultural ...
theforestecologist's user avatar
3 votes
0 answers
54 views

Where does the water in the Euphrates and Tigras rivers come from?

The research I've done says that the rivers are fed by alpine snow, lakes and rains in the Taurus mountains but I'm specifically interested in whether the rains/snows and the water that feeds the ...
Wally's user avatar
  • 31
3 votes
0 answers
59 views

Where's the Colorado River water going between Glen Canyon and Lake Mead?

While looking through the "minimum inflow" 24-month projection for the Colorado River basin, I noticed something odd for the Lake Mead chart: an expected negative inflow from side streams in ...
Mark's user avatar
  • 1,261
3 votes
0 answers
327 views

Why are the Himalayan rivers highly tortuous in the mountain reaches?

"In the Himalayan reaches, the course of these rivers is highly tortuous, but over the Plains they display a strong meandering tendency and shift their courses frequently." This is what I ...
Sasikuttan's user avatar
3 votes
0 answers
227 views

As small streams freeze solid, how can big rivers continue to carry water?

In areas of very cold temperatures (-20°C and below), it is not uncommon for small streams to freeze completely (as in, from top to bottom) and larger rivers to develop thick ice covers. However, ...
Callid's user avatar
  • 31
3 votes
0 answers
46 views

How to map a comID to latitude/longitude?

I'm working with a dataset of river flow from NOAA and the locations of the measurements are indicated with a comID. From what I gathered these comIDs are rooted from a dataset called NHD, although I ...
schapke's user avatar
  • 131
3 votes
0 answers
101 views

Modeling the total water inflow across multiple reservoirs

I'm new to hydrology and I have a question regarding the modeling of multiple reservoirs. I need to estimate the total water inflow to multiple reservoirs that will be observed tomorrow, conditional ...
Andrew's user avatar
  • 81
3 votes
0 answers
75 views

California length, source, and mouth of rivers

How can I find out / where can I find the length, "source" (beginning point), "mouth" (ending point) of the California portion of rivers? For example, it's easy to find the length, source, and mouth ...
B. Clay Shannon-B. Crow Raven's user avatar
3 votes
0 answers
26 views

For how long have the great karst springs of the Aachtal been active?

Aachtal, along with Lonetal, is a valley in the Swabian Jura, Germany, and the site of many famous archaeological sites of the upper Pleistocene. It also hosts a series of very large karst springs (...
HannesH's user avatar
  • 221
2 votes
0 answers
21 views

Seeking guidance on predicting salinity of River network with incomplete data

So I am working with the USGS data on salinity of various River reaches in the United States and not every reach mapped has been tested. Is there an accepted model for inferring the salinity of ...
Wesley Young's user avatar
2 votes
0 answers
81 views

Noise pollution: Highway vs river

Recently, I noticed that a highway and a river sound fairly similar. This got me thinking that they say noise pollution from highways causes stress even if you don't really notice it. So, the question ...
Emiel Lanckriet's user avatar
2 votes
0 answers
43 views

Is a Gumpe the same as a plunge pool or stream pool?

In river morphology, a plunge pool is a (small) lake formed at the bottom of a waterfall. In German, there exists the word Gumpe, apparently from Bavarian. From the German language Wikipedia, a Gumpe ...
gerrit's user avatar
  • 11.7k
2 votes
0 answers
345 views

What is difference between Riverbed conductance term and streambed leakance/retardation coefficient?

In literature some times to account for semi-pervious sediments at bottom of stream, streambed leakance also called retardation coefficient ($L$) is used. This is equal to the ratio of conductivity of ...
Ather Cheema's user avatar
1 vote
0 answers
30 views

How does the water passing Dike Kokaral compare to the discharge of the Syr Darya river before its water flow was improved?

According to Wikipedia, the North Aral Sea is being partially restored, by restoring some of the Syr Darya river's flow (which was diverted by the Soviet Union for irrigation), and by building Dike ...
Speedphoenix's user avatar
1 vote
0 answers
38 views

List of estuary/mouth size for European rivers

I am looking for a list that contains either the size of estuaries or river mouths of European rivers. Is there such a list available somewhere? I have been looking for a while but only found lists ...
ATYslh's user avatar
  • 11
1 vote
0 answers
1k views

How many years does it take for rivers to form?

I've looked this up as best as I could and couldn't find a clear answer. I've seen for example articles on the age of several rivers as being the oldest ones, but nothing regarding the opposite. Could ...
Bawddor's user avatar
  • 11
1 vote
0 answers
162 views

Which is the longest River in Germany and Russia?

Danube is 2850 km long and yet Rhine (1233 km) is considered the longest River in Germany. Likewise,the confusion between Yenisei and Volga in Russia.
Harveen Bhatia's user avatar
1 vote
0 answers
30 views

Relationship between sediment concentration of flow and erosion - streampower equation

I am trying to understand how the sediment concentration of a flow affects erosion. I stumbled across this paper by Bagnold (1968) today that uses a form for the stream power equation that I had not ...
Esme_'s user avatar
  • 131
0 votes
0 answers
18 views

What is the sphericity and roundness of Saône River Sand

I'm interested in knowing about Saône River sand found at the river's headwater just outside the city of Dijon, France, as seen in the image below, Saône highlighted red, Dijon highlighted yellow. (...
Armadillo's user avatar
  • 581