Why may cave passages change during floods in the epiphreatic karst zone?
Answer and explanation
Correct answer: Water-table fluctuation makes passages alternately air-filled and water-filled causing erosion
The correct answer is A. The epiphreatic zone lies at or near the fluctuating water table, so cave passages may alternate between air-filled and water-filled conditions. During floods, rising hydraulic pressure and faster groundwater flow can enlarge, redirect, or partly block conduits through dissolution and sediment movement. Wind, marine tides in a desert, and drumlin formation do not explain this karst process.
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What is the correct answer to this question?
Water-table fluctuation makes passages alternately air-filled and water-filled causing erosion
Why is this the correct answer?
The correct answer is A. The epiphreatic zone lies at or near the fluctuating water table, so cave passages may alternate between air-filled and water-filled conditions. During floods, rising hydraulic pressure and faster groundwater flow can enlarge, redirect, or partly block conduits through dissolution and sediment movement. Wind, marine tides in a desert, and drumlin formation do not explain this karst process.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Bills of Exchange.
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