Some large rivers carry less sediment and in many instances a river may enter an Ocean where there is a steep drop off in the Ocean's depth and both of the above reasons would prevent deltas from forming.
To answer this question, I have to take you back to the process which a river carries its load, and that is saltation, suspension, and traction. As the river matures, it has a higher likelihood of carrying more weight; it also has a wider and U-shaped riverbed. In addition to that, it has more water that channeled to its systems from the many streams and rivers that join it. Remember River capture? Thats also another way it gets more water and hence more load to it. Upon reaching the lake or sea water, the river speed is almost at its lowest. It loses the power to carry on more sediments. As a result, the deposits tend to be dropped at the mouth of the river. At times, waves tend to push somehow and pile up the sediments. Accumulation results in build up of sand layers, and this is what is referred to as a Delta.
Rivers which carry fewer sediments have a lesser likelihood of forming deltas.
If there is also a steep drop off at the point the river meets the ocean, then that will prevent the formation of deltas.
If the coastline is submerged, there will be a lesser likelihood of delta formation. Instead, it will form an estuary.
Topograpghy of the landscape is also another factor that determines the formation of a delta too. Should there be boulders along the river channel, they may trap sediments which may accumulate to form deltas too.
I hope this answers your question. If you have a paper, thesis or academic writing on the same, feel free to seek help from me, I will be more than glad to assist.
All rivers waters carry a load of sediments. When the slope of the river is reduced or flattened the velocity drops and the sediment is also dropped, to form a Delta (many channels).
If the slope of the River near entry to the see id steeper no delta is formed.
it depends on many factors, firstly its flow , if it a very long river it will carry large amounts of silts and eroded materials and will deposited near the mouth creating a delta, secondly it depends on the coast nature of coast from where the river is falling into the sea, if it is an submerging coast then it is unlikely that it will form a delta , it will form an estuary instead,if it is an emerging coast then it is more likely that it will form a delta,plz vote for best answer:-)
Answers & Comments
Verified answer
Some large rivers carry less sediment and in many instances a river may enter an Ocean where there is a steep drop off in the Ocean's depth and both of the above reasons would prevent deltas from forming.
To answer this question, I have to take you back to the process which a river carries its load, and that is saltation, suspension, and traction. As the river matures, it has a higher likelihood of carrying more weight; it also has a wider and U-shaped riverbed. In addition to that, it has more water that channeled to its systems from the many streams and rivers that join it. Remember River capture? Thats also another way it gets more water and hence more load to it. Upon reaching the lake or sea water, the river speed is almost at its lowest. It loses the power to carry on more sediments. As a result, the deposits tend to be dropped at the mouth of the river. At times, waves tend to push somehow and pile up the sediments. Accumulation results in build up of sand layers, and this is what is referred to as a Delta.
Rivers which carry fewer sediments have a lesser likelihood of forming deltas.
If there is also a steep drop off at the point the river meets the ocean, then that will prevent the formation of deltas.
If the coastline is submerged, there will be a lesser likelihood of delta formation. Instead, it will form an estuary.
Topograpghy of the landscape is also another factor that determines the formation of a delta too. Should there be boulders along the river channel, they may trap sediments which may accumulate to form deltas too.
I hope this answers your question. If you have a paper, thesis or academic writing on the same, feel free to seek help from me, I will be more than glad to assist.
All rivers waters carry a load of sediments. When the slope of the river is reduced or flattened the velocity drops and the sediment is also dropped, to form a Delta (many channels).
If the slope of the River near entry to the see id steeper no delta is formed.
it depends on many factors, firstly its flow , if it a very long river it will carry large amounts of silts and eroded materials and will deposited near the mouth creating a delta, secondly it depends on the coast nature of coast from where the river is falling into the sea, if it is an submerging coast then it is unlikely that it will form a delta , it will form an estuary instead,if it is an emerging coast then it is more likely that it will form a delta,plz vote for best answer:-)
A lot depends on the nature of the land they cut through.
I'd like to know more about this too
some might fall into the sea as a waterfall.
Don't they?
Give an example
possible yes