Why can an old distributary suddenly become inactive during delta avulsion?
Answer and explanation
Correct answer: Because the river takes a shorter and steeper new route
Delta avulsion occurs when a river abandons its former channel and suddenly shifts into a new course, often because the new route offers a shorter or steeper path to the sea. The new channel captures more discharge, so water and sediment supply to the old distributary fall sharply. Without sufficient flow, the old branch becomes inactive and may gradually fill with sediment. Thus, option C is correct.
Frequently asked questions
What is the correct answer to this question?
Because the river takes a shorter and steeper new route
Why is this the correct answer?
Delta avulsion occurs when a river abandons its former channel and suddenly shifts into a new course, often because the new route offers a shorter or steeper path to the sea. The new channel captures more discharge, so water and sediment supply to the old distributary fall sharply. Without sufficient flow, the old branch becomes inactive and may gradually fill with sediment. Thus, option C is correct.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Recording of Transactions (I & II). Topic: Covers the accounting equation.
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