Attanagalu Oya

Attanagalu Oya (Sinhala: අත්තනගලු ඔය) is a river located in the wet zone of Sri Lanka. It flows through Gampaha District by providing water for irrigation and drinking water supplies (Pathirana et al., 2012; Waniganethti et al., 2012).

River basin
The Attanagalu Oya basin is situated between the Kelani (south) and Maha Oya (north) basins in the Western Province (Arumugam, 1969; Wijesekara & Kudahetty, 2010). It is the main river basin in Gampaha District with an extent of 727 km2 (Waniganethti, 2012; Wijesekera & Perera, 2012). Majorly four streams namely; Diyaeli Oya, Attanagalu Oya, Uruwal Oya, Kimbulapitiya Oya form the Attanagalu Oya which discharge into the Negombo Lagoon as Dandagamuwa Oya (Arumugam, 1969; Pathirana et al., 2012; Wijesekara & Kudahetty, 2010).

Under the Attanagalla Oya Irrigation Development Scheme, a number of anicuts were constructed during 1945 -1950 (Arumugam, 1969).

Diyaeli Oya: Muruthawela anicut, Pallewela anicut, Maha-Amuna anicut, Panugala anicut, Idallawela anicut.
Attanagalu Oya: Morenna anicut, Ketawala anicut, Tammita anicut, Kotugoda anicut.
Uruwal Oya       : Kinigama anicut, Galwetiya anicut, Bogampitiya anicut, Welikada anicut.

1) Arumugam, S., 1969. Water resources of Ceylon: its utilisation and development. Water Resources Board. p.385.
2) Pathirana, C., Bandara, N.J.G.J., Jayaweera, C. and Fonseka, W.F., 2012, November. Suitability of Attanagalu Oya as a drinking water source. In Proceedings of International Forestry and Environment Symposium (pp. 26-27).
3) Waniganethti, D., Najim, M.M.M. and Halwatura, D., 2012. Seasonal variation of rainfall at Attanagalu Oya. Water Professional's Day Symposium. pp.31-42.
4) Wijesekera, N.T.S. and Perera, L.R.H., 2012. Key issues of data and data checking for hydrological analyses-case study of rainfall data in the Attanagalu Oya basin of Sri Lanka. Engineer: Journal of the Institution of Engineers, Sri Lanka, 45(2).
5) Wijesekara, R.S. and Kudahetty, C., 2010. Preliminary groundwater assessment and water quality study in the shallow aquifer system in the Attanagalu Oya Basin. In Proceedings of National Conference on Water, Food Security and Climate Change in Sri Lanka. Water Quality, Environment and Climate Change (Vol. 2). pp.77-87.

Location Map
This page was last updated on 14 May 2022
For a complete tourist map follow this link: Lankapradeepa Tourist Map

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