Did you know that the Deduru Oya is the sixth-longest river in Sri Lanka? With the building of a dam throughout this massive water body, it offers water for irrigation and agriculture to over 27,000 acres of land within the Kurunegala and Puttalam districts. The towers of the sluice gates stand tall much like guarding soldiers.
Site studies and design of the dam were accomplished by engineers from the Ministry of Irrigation.
According to history, it’s believed that during the reign of King Parakramabahu I (1153-1186 AD), an irrigation system evolved focusing the Deduru Oya.
Remnants of an excellent historical past remain with the archaeological findings of the Katuwannawa Asanagharaya, which is a quick distance from the reservoir and is thought to been built in the distant past.
In addition to the 8 sluice gates, water from the reservoir is channeled from the reservoir (for irrigation) via three canals. They are named as the left canal, central canal, and the south canal. The south canal measures up to 33 km (21 mi). It is pumping water from the Deduru Oya Reservoir to the Inginimitiya Reservoir at a flow rate of three hundred cu ft/s.
Deduru Oya Dam is a beautiful site that shouldn’t be missed to visit.
Photo courtesy : Onal Karunaratne
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