Noyyal
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Overview
The Noyyal rises in the Velliangiri hills of the Western Ghats near Coimbatore and flows east through Coimbatore and Tiruppur to join the Kaveri near Karur.
Tiruppur is India's knitwear capital, and effluent from dyeing and bleaching units badly polluted the river, damaging farmland downstream. Court orders pushed industries towards zero liquid discharge.
The river once fed a chain of tanks that irrigated the region.
Geography and key facts
- Tributary of the Kaveri, Tamil Nadu
- Through Coimbatore and Tiruppur
- Polluted by textile dyeing effluent
- Zero liquid discharge orders for industry
Why it matters for UPSC
A standard case of industrial water pollution and the zero liquid discharge approach.
Note for UPSC
A Kaveri tributary through Coimbatore and Tiruppur.
Prelims asks about tributaries, the states a river flows through, its basin and the projects on it, so trace the course on the map.
Asked in PYQs
No question in our Prelims bank names Noyyal yet.
Key facts
- Type
- River
- State / UT
- Tamil Nadu
- River system
- Peninsular
- Basin
- Kaveri
- Extent on map
- 10.9°–11.1°N, 76.7°–77.9°E
From the Map Explorer data; positions are for orientation.
In the lessons
- Physical Features and Drainage of India (map lesson)
- Drainage Systems of India: Himalayan and Peninsular Rivers (map lesson)