The Malwathu Oya ( Malwathu Oya, Aruvi Aru) is the second longest river in Sri Lanka. The river originates in the North Central Province of Sri Lanka and enters the sea on the northwest coast, into the Gulf of Mannar, near Vankalai. It is a seasonal river that spans over through paddy and forest lands, which are used by the inhabitants to cultivate for their survival.P.A.C.T. Perera, T.V. Sundarabarathy, T. Sivananthawerl, U. EdirisingheSeasonal variation of water quality parameters in different geomorphic channels of the upper Malwathu Oya in Anuradhapura, Sri LankaTrop. Agric. Res., 25 (2014), pp. 158-170
The river basin covers an area of (with a length of , a maximum width of at an average height of above sea level). The average annual rainfall in the basin area is . The Ritigala mountain range, which comprises four main peaks (the highest of which is over high), in the upper reaches of the river, serves as the main catchment.
Tributaries Kanadara Oya Maminiya Oya Kadahatu Oya Kal Aru Narivili Aru
See also List of rivers in Sri Lanka
References