Question

What distinguishes 'onstem' reservoirs from 'offstem' reservoirs?

1. Onstem reservoirs are located in upland areas and formed by damming rivers, while offstem reservoirs are in lowlands and use pumped water.
2. Onstem reservoirs rely on pumping water, whereas offstem reservoirs are naturally formed.
3. There is no significant difference between onstem and offstem reservoirs.

• A. 2, 3
• B. All
• C. 1, 3
• D. 1 only

Answer 1

Answer:

D. 1 only

• Reservoirs located in upland areas and are formed by damming a stretch of river or stream in a suitable river valley are called - Onstem reservoirs

• In India mostly onstem reservoirs are found

• Reservoirs built in low land areas by pumping water some distance from a river or from an underground source - Offstem reservoirs