Multiple choice

In arid zone, wells are dug near the tanks. Why?

  1. For getting large quantity of water

  2. For reducing salinity of water

  3. For making water of tank useful

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In arid regions, high evaporation causes salts to concentrate in tank water. When wells are dug near tanks, the fresher well water mixes with and dilutes the more saline tank water through percolation, making the combined water more usable for irrigation and drinking.