how is a river for med and how does it flow?
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A river forms from water moving from a higher altitude to a lower altitude, all due to gravity. When rain falls on the land, it either seeps into the ground or becomes runoff, which flows downhill into rivers and lakes, on its journey towards the seas.
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How is a river formed?
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Nicholas Lee Ka Hoe
Nicholas Lee Ka Hoe, Knows a little bit about everything
Answered Dec 19, 2016
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A river is formed from many ways. One of the most common are those of glacier, rain, snow and precipitation.
Water is naturally erosive over time. Water tends to flow from higher grounds until they reach the ocean. Rivers form when snow and ice on top of mountains melt and form small rivulets that flow downhill. Over time, they would have eroded away a path down the mountains in a V-shaped fashion.
Once they reach lower altitudes, the ground gets flatter and so, the river begins to flow more horizontally, this is the most common river you see everyday that cuts through cities and such. Because of the flatter land, the river will no longer cut a steep valley, and instead the flow of water will slow down and create a wider, slower flowing river.
After that, a variety of river phenomenons can occur. Floodplains, marshes, deltas, oxbow lakes, bends, and such.
To learn more about how rivers form, you can check out the below links, I'm afraid my meager understanding of it cannot help you much, but I can direct you to it.
Water cycle - Wikipedia
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Abhi Singh
Abhi Singh, River formations
Answered Nov 15, 2016
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Rivers usually have two types of origin either through glaciers and they generally are perennial and rain-fed (seasonal where there are dry spells in a year). So this will give two types of river origin.
As glaciers melt the water starts flowing through the least resistant part. Initially these water are in the form of small streams. These forms rills then gullies. As time passes their path gets deepened due to downward cutting. According to Davis theory, rivers have three stages young, mature and old.
In young stage rivers are mainly in mountainous region where due to slope rivers have huge energy. So they can carry huge load and participate in erosion. During this stage river is engaged in downward cutting through attrition, abrasion, collision etc. We generally find these types of features: V shaped valley, gorges and canyons, rapids, cataracts, waterfalls and plunge pools, river capture due to headward erosion etc.
In old stage river has lost all erosional capacity and deposition is on peak. Prominent features are sluggish river flow, very wide channel, flattening of river, water divide eroded away, peneplain, boondocks and delta.
Same applies to river originating due to rain. but most of them are not perennial. But general mechanism of formation are same.
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Scenario 1:
Water flows through the grooves of a mountain's surface and as the water flows it carves a channel and continues doing this downstream towards lower land. With fast flowing water and little or negligible deposits of particles (rock, sand, silt or clay, rock the largest particle and clay the smallest) the channel becomes a stream that becomes longer and wider. This stream now flows and becomes even longer and wider and empties out into the Sea. Now it becomes a river. If you check maps of rivers, they all have a connection either directly or by joining with other rivers to the Sea.
The Essequibo and Demerara Rivers in Guyana are examples of rivers that formed this way.
Scenario 2:
A valley exists. It has been formed through natural Earth processes.
The valley’s length stretches towards the Sea or it is connected to a river which in turn flows into the sea
Rain falls and fills this valley.
The valley becomes flooded.
A river is formed
The part of the Nile river near Egypt is an example of a valley involved in the formation of a river in this way.
Rgardless of how the river formed, they empty out into the sea.
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Nicholas Lee Ka Hoe
Nicholas Lee Ka Hoe, Knows a little bit about everything
Answered Dec 19, 2016
Continue Reading
A river is formed from many ways. One of the most common are those of glacier, rain, snow and precipitation.
Water is naturally erosive over time. Water tends to flow from higher grounds until they reach the ocean. Rivers form when snow and ice on top of mountains melt and form small rivulets that flow downhill. Over time, they would have eroded away a path down the mountains in a V-shaped fashion.
Once they reach lower altitudes, the ground gets flatter and so, the river begins to flow more horizontally, this is the most common river you see everyday that cuts through cities and such. Because of the flatter land, the river will no longer cut a steep valley, and instead the flow of water will slow down and create a wider, slower flowing river.
After that, a variety of river phenomenons can occur. Floodplains, marshes, deltas, oxbow lakes, bends, and such.
To learn more about how rivers form, you can check out the below links, I'm afraid my meager understanding of it cannot help you much, but I can direct you to it.
Water cycle - Wikipedia
17.4k Views · View Upvoters · Answer requested by Sidra Batool
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Sunil SinghComment...
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Abhi Singh
Abhi Singh, River formations
Answered Nov 15, 2016
Continue Reading
Rivers usually have two types of origin either through glaciers and they generally are perennial and rain-fed (seasonal where there are dry spells in a year). So this will give two types of river origin.
As glaciers melt the water starts flowing through the least resistant part. Initially these water are in the form of small streams. These forms rills then gullies. As time passes their path gets deepened due to downward cutting. According to Davis theory, rivers have three stages young, mature and old.
In young stage rivers are mainly in mountainous region where due to slope rivers have huge energy. So they can carry huge load and participate in erosion. During this stage river is engaged in downward cutting through attrition, abrasion, collision etc. We generally find these types of features: V shaped valley, gorges and canyons, rapids, cataracts, waterfalls and plunge pools, river capture due to headward erosion etc.
In old stage river has lost all erosional capacity and deposition is on peak. Prominent features are sluggish river flow, very wide channel, flattening of river, water divide eroded away, peneplain, boondocks and delta.
Same applies to river originating due to rain. but most of them are not perennial. But general mechanism of formation are same.
6.9k Views · View Upvoters
Your feedback is private.
Is this answer still relevant and up to date?
Scenario 1:
Water flows through the grooves of a mountain's surface and as the water flows it carves a channel and continues doing this downstream towards lower land. With fast flowing water and little or negligible deposits of particles (rock, sand, silt or clay, rock the largest particle and clay the smallest) the channel becomes a stream that becomes longer and wider. This stream now flows and becomes even longer and wider and empties out into the Sea. Now it becomes a river. If you check maps of rivers, they all have a connection either directly or by joining with other rivers to the Sea.
The Essequibo and Demerara Rivers in Guyana are examples of rivers that formed this way.
Scenario 2:
A valley exists. It has been formed through natural Earth processes.
The valley’s length stretches towards the Sea or it is connected to a river which in turn flows into the sea
Rain falls and fills this valley.
The valley becomes flooded.
A river is formed
The part of the Nile river near Egypt is an example of a valley involved in the formation of a river in this way.
Rgardless of how the river formed, they empty out into the sea.
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