Which river does the Mettur Dam regulate?
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This question examines an important river-or-lake fact: “Which river does the Mettur Dam regulate?” The correct answer is Kaveri. The Mettur Dam (also known as Stanley Reservoir) is built on the Kaveri River in Salem district of Tamil Nadu. The dam regulates the flow of Kaveri River and provides irrigation for paddy cultivation in the Kaveri Delta region. A river system includes its source, tributaries, distributaries, drainage basin, watershed, channel, floodplain, delta or estuary and final outlet. River behaviour depends on relief, geology, rainfall, snowmelt, sediment load, vegetation and human intervention. Examination questions often confuse a river’s source with its mouth, a left-bank tributary with a right-bank tributary, or a natural lake with a reservoir.