Which of the following is/are the most likely cause/causes of sheet-flood found in western part of Rajasthan? 1. Scanty rainfall 2. Sudden high intensity rain 3. Loose sandy soil with scanty vegetation Select the correct answer using the code given below.

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Q: 74 (NDA-I/2014)

Which of the following is/are the most likely cause/causes of sheet-flood found in western part of Rajasthan?
1. Scanty rainfall
2. Sudden high intensity rain
3. Loose sandy soil with scanty vegetation
Select the correct answer using the code given below.

question_subject: 

Geography

question_exam: 

NDA-I

stats: 

0,20,18,5,2,20,11

keywords: 

{'rajasthan': [0, 0, 1, 18], 'flood': [1, 0, 0, 0], 'sudden high intensity rain': [0, 0, 0, 1], 'causes': [1, 0, 0, 6], 'sheet': [0, 0, 1, 0], 'scanty vegetation': [0, 0, 0, 1], 'sandy soil': [2, 0, 0, 2]}

The correct answer is "Option 3: 2 and 3 only."

Sheet-floods are a type of flood characterized by a thin layer of water flowing over a large area. In the western part of Rajasthan, sheet-floods are most likely caused by two factors mentioned in option 3:

2. Sudden high-intensity rain: This area is known to experience infrequent but intense rainfall events. The sudden downpour results in a large amount of water flowing over the land, leading to sheet-flooding.

3. Loose sandy soil with scanty vegetation: The region in western Rajasthan is predominantly characterized by loose sandy soil which has poor water retention capacity. Additionally, the lack of vegetation in the area further contributes to the problem. Without vegetation to hold the soil together, the loose sandy soil easily erodes and creates channels for water to flow over an extended area.

Scanty rainfall (mentioned in option 1) is not the most likely cause of sheet-floods in this region as sheet-floods occur during intense rainfall events, not during periods of low rainfall. Hence, option 1 is not correct.

Therefore, the correct answer is option 3: 2 and 3 only.