Why does coarse sediment in a natural levee mostly settle near the river bank?
Answer and explanation
Correct answer: Water suddenly spreads and loses velocity near the bank
During a flood, water overtops the channel and spreads across the relatively rough floodplain. Friction and sudden spreading reduce velocity immediately beside the bank, so the river loses capacity to carry its heaviest sand and gravel first. Repeated floods build raised natural levees. Glaciers, wind lifting, and limestone dissolution are not responsible for this fluvial deposit.
Frequently asked questions
What is the correct answer to this question?
Water suddenly spreads and loses velocity near the bank
Why is this the correct answer?
During a flood, water overtops the channel and spreads across the relatively rough floodplain. Friction and sudden spreading reduce velocity immediately beside the bank, so the river loses capacity to carry its heaviest sand and gravel first. Repeated floods build raised natural levees. Glaciers, wind lifting, and limestone dissolution are not responsible for this fluvial deposit.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Bank Reconciliation Statement. Topic: Reconciling cash book and passbook differences.
