If one plots the tank irrigation in India and superimposes it with map of well irrigation, one may find that the two are negatively related. Which of the following statements explain the phenomenon? 1. Tank irrigation predates well irrigation. 2. Tank irr

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Q: (CDS-I/2019)
If one plots the tank irrigation in India and superimposes it with map of well irrigation, one may find that the two are negatively related.
Which of the following statements explain the phenomenon?
1. Tank irrigation predates well irrigation.
2. Tank irrigation is in the areas with impervious surface layers.
3. Well irrigation requires sufficient ground water reserves.
4. Other forms of irrigation are not available.
Select the correct answer using the code given below.

question_subject: 

Geography

question_exam: 

CDS-I

stats: 

0,68,55,40,68,5,10

keywords: 

{'tank irrigation': [0, 0, 0, 3], 'well irrigation': [0, 0, 0, 1], 'irrigation': [1, 1, 0, 2], 'sufficient ground water reserves': [0, 0, 0, 1]}

The correct answer for this question is option 2, which states that tank irrigation is in the areas with impervious surface layers, and well irrigation requires sufficient ground water reserves.

Option 1, which states that tank irrigation predates well irrigation, is not an explanation for the negative relationship between the two. The order in which the two methods were adopted does not necessarily explain their relationship.

Option 3, which states that well irrigation requires sufficient ground water reserves, is a valid explanation for the negative relationship. If an area has a high availability of ground water, there would be a greater tendency to use well irrigation compared to tank irrigation.

Option 4, which states that other forms of irrigation are not available, is not an explanation for the negative relationship between tank and well irrigation. The availability or lack of other forms of irrigation does not directly relate to the relationship between tank and well irrigation.

In summary, the correct explanation for the negative relationship between tank and well irrigation is that tank irrigation is found in areas with impervious surface layers, while well irrigation requires sufficient ground water reserves.

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