Which of the following is are the reasons of debris avalanche and land slide in the Western Ghats 1 ...........

Geography and Environment(BPSC) Disasters and Management issues

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Which of the following is/are the reasons of debris avalanche and land slide in the Western Ghats?

1. Many slopes are steeper with almost vertical cliffs and escarpments in the Western Ghats and Nilgiris.

2. Mechanical weathering due to temperature changes and ranges is pronounced.

3. They receive heavy amounts of rainfall over short periods.

Select the correct answer using the code given below:

1 only

2 only

3 only

1, 2 and 3

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Explanation:

Debris avalanche and land slide in the Western Ghats:

Compared to the Himalayas, the Nilgiris bordering Tamil Nadu, Karnataka, Kerala and the Western Ghats along the west coast are relatively tectonically stable and are mostly made up of very hard rocks; but, still, debris avalanches and landslides occur though not as frequently as in the Himalayas, in these hills.

Reasons:
Many slopes are steeper with almost vertical cliffs and escarpments in the Western Ghats and Nilgiris.
Mechanical weathering due to temperature changes and ranges is pronounced.
They receive heavy amounts of rainfall over short periods. So, there is almost direct rock fall quite frequently in these places along with landslides and debris avalanches .