The Upper Indravati Catchment covering an area of 2, 64,013.40 ha.1 is located between 18° 45’ - 18° 56’ N latitude and 82°33’-83°10’ E longitudes in Koraput, Kalahandi, Rayagada and Nowrangpur districts. The catchment area spreads over 10 CD blocks viz., Boriguma, Koraput, Laxmipur, Dasmanthapur, Semiliguda & Narayanpatna in Koraput district; Th.Rampur in Kalahandi district; Tentulikhunti and Nandahandi in Nowrangpur district and Kasipur in Rayagada district. Indravati river system has Bhaskel on its right bank and Podagada, Kapur, Muran and Telengiri on its left bank as its tributaries. The river drains into Godavari basin in Chhatisgarh. The total population is 4.374 million with 45.64% of ST and 17.29% of SC community living in 816 villages and two towns. The average annual rainfall in the area is 1500 mm. The soil texture is mostly loamy sand (41%) followed by clay (20%), sandy loam (18%), sandy clay loam (15%) and clay loam (6%). Forty four percent of the area is moderate to steeply sloped ranging from 10 —15%. Thirty percent of the area has a slope ranging from 5 —10%. The catchment has a net work of drainage system with a drainage density of 3.37 Km./Sq.Km.
The Upper Kolab catchment covering an area of 162,499.14 Ha is located between 82° 34’42’’ - 83° 03’04’’ East Longitude and 18°24’45’’-18°49’35’’ North latitude in Koraput district. The catchment area spreads over 7 CD blocks viz., Koraput, Similitude Potangi, Nandapur, Lamtaput, Boipariguda,& Narayanpatna in Koraput district. Kolab River originates near Sinkaran hills from a plateau and follow north west in a winding rocky bed and falls into a plateau south of Jeypore. The river drains into Godavari basin. Its main tributaries are Garia Nadi and Poteru Vogu.The total population is 1.181 million with 49.6% of ST and 13% SC community living in 413 villages and 3 towns. The average annual rainfall in the area is 1500 mm. The soil texture is mostly sandy clay loam (46%) followed by loamy sand (27%), sandy loam (21%), and clay loam (6%). The catchment has a net work of drainage system with a drainage density of 3.19 Km./Sq.Km.