Classification of Indian Lakes by Origin
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Exactly the mechanisms introduced in Part 1 apply to India's own lakes — and Indian exams love asking "what kind of lake is X," so pin each named lake below to its formation type first, its state second.
| Origin type | Mechanism | Indian examples |
|---|---|---|
| Tectonic | Crustal warping/faulting creates a basin | Wular Lake (Jammu & Kashmir) |
| Glacial | Himalayan glaciers gouge basins or leave moraine-dammed lakes | Gangabal Lake (Kashmir), Roopkund, Nainital, Bhimtal, most high-Himalayan lakes |
| Lagoon/coastal | A barrier beach or sandbar seals off a coastal inlet | Chilika (Odisha), Pulicat (Andhra Pradesh–Tamil Nadu), Vembanad (Kerala) |
| Crater/volcanic (meteor impact) | A meteorite strike gouges a crater that fills with water | Lonar Lake (Maharashtra) — India's only confirmed impact-crater lake |
| Oxbow | A meandering river strands a cut-off loop | Numerous small lakes along the Ganga, Brahmaputra, and other North Indian rivers |
| Artificial/reservoir | A dam impounds a river for irrigation, power, or water supply | Govind Sagar (Bhakra Dam, Sutlej river), Nagarjuna Sagar (Krishna river) |
Memory hook: "Wular's crust warped, Gangabal's glacier carved, Chilika's sandbar sealed, Lonar's meteor cratered, Oxbows got cut off, Govind Sagar got dammed." W-G-C-L-O-G, six origin types, six one-lake anchors, in the same order as the table.
Practice Recall: Before reading on, name the six lake-formation types covered above, and give one Indian example of each.
Answer: Tectonic (Wular), Glacial (Gangabal), Lagoon/coastal (Chilika), Crater/volcanic (Lonar), Oxbow (various North Indian river-plain lakes), Artificial/reservoir (Govind Sagar).