Assam - Ministry of Environment and Forests

7.1.14 TinsukiaThe district is situated in the north eastern part of Assam between 27 o 15'N and 28 o 00'N latitudes and 95 o 15'Eand 96 o 00'E longitudes. It occupies 3,47,600 hectares of land.. It is bounded on the east by Arunachal Pradesh,on the west by Dibrugarh district, on the north by Lakhimpur district and south by the Dibrugarh district and partof Arunachal Pradesh. The district is characterised by a flat monotonous terrain from the Brahmaputra riversouthwards upto the upper Dihing R.F. where it starts rising slowly into the broken hills that comprise the foothillsof the Tirap district of Arunachal Pradesh. The tract is drained by the Brahmaputra river and its main tributaryBurhi Dihing. Soils of this district are divided into three distinct categories. viz. new alluvial soils in an areaextending few kms to the south of the Brahmaputra river, old alluvial soils in the central part of the district andold mountain valley alluvial soil located on the foothills of Arunachal Pradesh. .The average annual rainfallranges from a minimum of 2134 mm to a maximum of 3785 mm. The minimum and maximum temperaturesrecorded are 7 o C and 37 o C during winter and summer respectively. As per Census Report, 2001, the district hasa total population of 11, 50,062.Total wetland area in the district is 40626 ha that includes 478 small wetlands (