
Photo by Chandana Gunatilake
Weirs, dams and anicuts often re-route water through canals, channels, tunnels or pipelines to increase the pressure and remove silt, leaving long stretches of dry bedrock. The ancient weirs and anicuts in Sri Lanka are locally known as the Amunas.
Legend of Uggal Kalthota Amuna
According to legend, as recounted by Bassett (1930/1997, pp. 48–50), the original canal was constructed by a mighty warrior named Nila Maha Yodhaya, who chose the barren land for irrigation. Selecting two large rocks near the present-day anicut, he carved sockets into them, which remain visible today. Using these sockets, he placed massive beams across the river to form a dam, which came to be known as Yodhaya Benna.
Once the dam was built, Nila Maha Yodhaya faced a dilemma—on which side of the river should he cut the canal? His uncertainty was resolved when he noticed a long sugarcane leaf caught between the rocks. Observing the direction in which the other end of the leaf was pointing, he deduced the river’s flow and dug the canal accordingly.
The sugarcane leaf (called ‘uk‘ in Sinhalese) had originated from Uggal Dowa, a valley above Belihul Oya, just below Horton Plains. It had drifted down through Hirikeiya Oya, into Belihul Oya, and finally into the Walawe Ganga River, floating all the way to Kaltota carrying a silent message to Nila Maha Yodhaya. Thus place got its prefix Uggal to the name Kaltota.
Once the canal was completed, he enthusiastically began cultivating paddy on both sides of the river. Confident in his efforts, he declared that when his harvest was gathered, the pile of paddy would be so high that one could see the sea from its peak.
After harvesting, he stacked the rice and asked his son to climb to the top and tell him if he could see the ocean. However, his wife, driven by greed, wanted him to cultivate even more land the following season. She instructed their son to tell his father that the sea was not visible, regardless of what he actually saw. The boy, obeying his mother’s orders, climbed the pile, and saw the sun reflecting off the distant ocean, yet falsely reported to his father that he could not see it.
Expecting her husband to expand cultivation, the wife’s plan backfired. Heartbroken and disillusioned, Nila Maha Yodhaya scattered his harvest to the wind, destroyed the weir he had built across the Walawe Ganga, and left—never to return again.
Brohier (1935) expands on this legend by recounting the childhood of Nila Maha Yodhaya. He was the son of a washerwoman who worked in the palace of King Gaja Bahu I (112–134 CE). One day, while she was busy washing clothes, she left her infant son, Nila, in the royal garden.
During this time, King Gaja Bahu happened to pass by and noticed the child had moved his royal staff—an object so heavy that even a grown man would struggle to lift it. Amazed by this extraordinary feat, the king exclaimed, “Nila, you are a giant!”
As he grew older, Nila lived up to this proclamation, developing superhuman strength. Historical records suggest that when King Gaja Bahu led an army to India, Nila Maha Yodhaya played a crucial role in the campaign, demonstrating his unmatched power. Upon returning to Sri Lanka in 113 CE, the king rewarded him with vast tracts of land for his service. One of these lands was a barren plain near what is now known as Kaltota—the very place where he later built his legendary amuna and the canal.
In 1892, the right bank channel was restored and an independent weir of 71 m long and 1m high was constructed upstream in 1956 to provide water for new left bank irrigation. Because of the relatively small height of the weir, there is a continuous spill of water flowing on the river.(Silva et al., 2014)
The ancient Uggal Kalthota Amuna lies close to the Bodagama-Kalthota road. Traveling 4.4 km past the road towards Kalthota Doowili Ella will bring you to the bridge over the Walawe River. The remains of the ancient Amuna lie a little distance above the bridge.
References
- Bassett, R. H. (1997). Romantic Ceylon: Its History, Legend, and Story (Reprint). Asian Educational Services. (Original work published 1930)
- Brohier, R. L. (1935). Ancient Irrigation Works in Ceylon : Western, Southern and the Eastern Areas of the Island: Part III. Government Publications Bureau (Ceylon).
- Collins, C. H. (1932). THE ARCHAEOLOGY OF THE SABARAGAMUWA BINTENNA. The Journal of the Ceylon Branch of the Royal Asiatic Society of Great Britain & Ireland, 32(85), 158–184.
- Silva, E. I. L., Manthrithilake, H., Pitigala, D., & Etige, N. (2014). Environmental flow in Sri Lanka: Ancient Anicuts Versus Modern Dams. Sri Lanka Journal of Aquatic Sciences, 19, 3–14.
Also See
- Hydro Heritage of Sri Lanka
- Ancient Heritage Sites of Sri Lanka
- Other Places of Interest Within Close Proximity
Map of Uggal Kalthota Amuna
The map above also shows other places of interest within a approximately 20 km radius of the current site. Click on any of the markers and the info box to take you to information of these sites
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Travel Directions to Uggal Kalthota Amuna
| Route from Balangoda to Uggal Kalthota Amuna |
| Distance : 30 km Travel time :1 hour Driving directions : see on google map |
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