2030. 1.9 Prepare remaining 10-climate inclusive river basin development plans. Ten basins identified are Kala Oya, Ma Oya, Gal Oya, Deduru Oya, Mahaweli Ganga, Mundeni Aru, Kalu Ganga, Kelani Ganga, Attanagalu Oya and Kala Oya. 2030. Domestic Water Supply Sub Sector. NDC 2. Ground and surface water monitoring in the Northern, North Central and North Western provinces and other areas of high drinking water vulnerability to drought. 2030.