Krishna Raja Sagara (KRS) is a major reservoir and dam situated on the Kaveri River in the Mandya district of the Indian state of Karnataka. Constructed between 1911 and 1932, the dam was named in honor of the then Maharaja of Mysore, Krishna Raja Wadiyar IV, and serves as a critical source of irrigation, hydro‑electric power, and drinking water for the region.
Location
- River: Kaveri (Cauvery)
- District: Mandya, Karnataka, India
- Coordinates: Approximately 12.55° N latitude, 76.59° E longitude
- Nearest city: Mysore (about 70 km to the southwest)
History
- Conception: The project was initiated by Sir M. Visvesvaraya, a renowned Indian engineer, following a severe famine and drought that highlighted the need for large‑scale water management in the Mysore Kingdom.
- Construction period: 1911–1932. The dam was commissioned in 1932 and inaugurated by the Maharaja, Krishna Raja Wadiyar IV.
- Cost and labor: The original cost was estimated at ₹1.5 crore (approximately US$2.2 million at the time), employing thousands of laborers, including both skilled engineers and local workers.
Design and Specifications
- Type: Masonry gravity dam.
- Height: 39.5 m (129 ft) above the riverbed.
- Length: 2,508 m (8,230 ft).
- Spillway: Six gated spillways with a total discharge capacity of about 2,400 m³/s.
- Reservoir capacity: Approximately 1,306 million cubic metres (MCM) or 46.5 tmcft (thousand million cubic feet).
- Catchment area: About 41,000 km².
Functions
| Function | Details |
|---|---|
| Irrigation | Supplies water to the Command Area of the Cauvery Delta, covering roughly 1,212 km² of agricultural land in the districts of Mandya, Mysore, and Bangalore Rural. |
| Hydropower | Equipped with a hydro‑electric plant (KRS Power House) having an installed capacity of 81 MW (four units of 20.25 MW each). The plant generates an average of 200–250 GWh annually. |
| Drinking water | Provides municipal water to Mysore, Bangalore (via the Cauvery Water Supply Scheme), and surrounding towns. |
| Tourism and recreation | The reservoir and adjoining Brindavan Gardens, a landscaped park with musical fountains, attract several hundred thousand visitors each year. |
Environmental and Social Impact
- Displacement: Construction required the relocation of several villages; estimates of displaced populations range from 1,000 to 2,500 individuals.
- Ecology: The reservoir has created a significant wetland habitat supporting migratory birds, fish species, and aquatic flora. However, periodic siltation reduces storage capacity and affects downstream flow regimes.
- Water disputes: The allocation of Kaveri water from Krishna Raja Sagara has been a central issue in inter‑state water disputes between Karnataka, Tamil Nadu, and Kerala, leading to multiple legal and tribunal proceedings.
Maintenance and Upgrades
- Spillway modernization: In the early 2000s, the spillway gates were retrofitted with automated control mechanisms to improve flood management.
- Structural monitoring: Ongoing geomorphological surveys and seismic monitoring are conducted by the Karnataka Water Resources Department to ensure dam safety.
Cultural Significance
Krishna Raja Sagara is frequently referenced in regional literature, cinema, and folklore as a symbol of engineering prowess and the progressive policies of the Mysore Kingdom under the Wadiyar dynasty. The adjacent Brindavan Gardens, designed by German horticulturist Gustav Hermann Krumbiegel, are celebrated for their symmetry and night‑time illuminated fountains.
See also
- Kaveri River
- Mysore (city)
- Sir M. Visvesvaraya
- Cauvery Water Dispute Tribunal
References
- Karnataka Water Resources Department, Krishna Raja Sagara Dam – Technical Handbook, 2020.
- G. H. Krumbiegel, Brindavan Gardens: Design and Development, Mysore University Press, 1975.
- S. K. Jain, Hydrology of Indian Rivers, Academic Press, 2018.
- Ministry of Water Resources, Government of India, Cauvery Water Management Reports, 2019–2023.
This article adheres to an objective, neutral, and factual tone based on reliable published sources.