Question:

The small watershed unit used for planning and management of soil and water conservation works is known as

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Micro-watershed is a small watershed unit used for local soil and water conservation planning.
  • Micro-watershed
  • River basin
  • Flood plain
  • Delta
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The Correct Option is A

Solution and Explanation

Concept:
A watershed is an area from which runoff drains to a common outlet.

Step 1:
Watersheds may be classified into basin, sub-basin, watershed and micro-watershed depending on size.

Step 2:
A micro-watershed is a smaller hydrological unit.

Step 3:
It is useful for detailed planning of soil conservation, water harvesting and drainage works.

Step 4:
River basin is much larger, while flood plain refers to land near a river that may get flooded.

Step 5:
Hence, the correct answer is: \[ \boxed{\text{Micro-watershed}} \]
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