national wetland atlas assam - Ministry of Environment and Forests

7.1.15 Dibrugarh
The district is situated in the north eastern part of Assam between 27 o 10'N and 27 o 45'N latitudes and 94 o 30'E
and 95 o 30'E longitudes. It occupies 3,54,500 hectares of area, which accounts for 4.52 per cent area of the
state. It is bounded on the east by Tinsukia, on the west by part of Sibsagar and Lakhimpur districts, on the
north by Lakhimpur district and south by the Sibsagar district and part of Arunachal Pradesh. The district is
characterised by a flat monotonous terrain from the Brahmaputra river southwards upto the upper Dihing R.F.
where it starts rising slowly into the broken hills that comprise the foothills of the Tirap district of Arunachal
Pradesh. The tract is drained by the Brahmaputra river and its main tributary the Burhi Dihing and the Mai Jan
river. Soils of this district are divided into three distinct categories. viz. new alluvial soils in an area extending few
kms to the south of the Brahmaputra river, old alluvial soils in the central part of the district and old mountain
valley alluvial soil located on the foothills of Arunachal Pradesh on the district. The average annual rainfall
ranges from a minimum of 2134mm to a maximum of 3785mm. The minimum and maximum temperatures
recorded are 7 o C and 37 o C respectively. As per Census Report, 2001, the district has a total population of 11,
85,072.
Total wetland area in the district is 72461 ha that includes 535 small wetlands (