General features of the Sivasagar District

Sivasagar district is situated in the North-Eastern part of Assam between 94.25° and 95.25° longitude and 26.45° to 27.15° latitude. The North and Western part of the district is bounded by Dibrugarh and Jorhat district of Assam respectively and the East and Western part is bounded by Arunachal Pradesh and Nagaland.

The district is located at Upper Brahmaputra Valley (UBVZ) of Agro-climatic zone of the state and occupies a total geographical area of 2668 sq.km. The block area of the district is 2,255.89 sq.km. which is about 14.02% of the UBVZ.

The district consists of 3 civil sub-divisions, 9 blocks, 118 Gram-Panchayats and 853 revenue villages.

Table 1:
Name of Block Geographic area (in ha) No. of Gaon Panchyat No. of revenue village
Information*
Average rainfall and rainy days (in mm) Temperature
(°C)
Relative humidity (%) Wind velocity (KMPH)
2004
Sun-shine hours*
2003 2004 2003 2004 2003 2004
Avg. in mm No. of days Avg. in mm No. of days Min-Max. Min-Max. Min-Max. Min-Max.
Sivasagar
31,440.06
17
120
125.23
11
164.26
10.0
18.08 (31.48)
18.17 (31.0)
70 (92)
75 (92)
3.0
5.0
Demow
37,649.00
20
159
125.23
11
164.26
10.0
18.08 (31.48)
18.17 (31.0)
70 (92)
75 (92)
3.0
5.0
Gaurisagar
25,252.67
15
105
125.23
11
164.26
10.0
18.08 (31.48)
18.17 (31.0)
70 (92)
75 (92)
3.0
5.0
Nazira
35,288.46
20
111
125.23
11
164.26
10.0
18.08 (31.48)
18.17 (31.0)
70 (92)
75 (92)
3.0
5.0
Amguri
10,587.83
10
59
125.23
11
164.26
10.0
18.08 (31.48)
18.17 (31.0)
70 (92)
75 (92)
3.0
5.0
Sonari
25,465.00
11
113
125.23
11
164.26
10.0
18.08 (31.48)
18.17 (31.0)
70 (92)
75 (92)
3.0
5.0
Lakuwa
8,274.00
4
27
125.23
11
164.26
10.0
18.08 (31.48)
18.17 (31.0)
70 (92)
75 (92)
3.0
5.0
Pachim Abhoypur
21,239.00
6
24
125.23
11
164.26
10.0
18.08 (31.48)
18.17 (31.0)
70 (92)
75 (92)
3.0
5.0
Sapekhati
35,986.00
15
135
125.23
11
164.26
10.0
18.08 (31.48)
18.17 (31.0)
70 (92)
75 (92)
3.0
5.0

Weathers :

The district is situated in the humid sub-tropical region and characterized by heavy rainfall and high relative humidity above 90%, high temperature upto 38°C is observed in the summer season and comparatively low temperature upto 7°C in rabi season. Average annual rainfall during 2004 was 1448.09 mm. Higher amount of rainfall received during June-September and scanty but evenly distributed rainfall during the rest of the months. Wind speed is quite low i.e. 3.0 km/h. Bright sunshine hours during the months of November to January are longer which is favourable for crop growth and yield but scanty water due to less rainfall may affect the crop growth.

Flood/drought :

The district of Sivasagar has chronically flood affected areas. Out of 9 blocks, 3 blocks namely, Gaurisagar, Sivasagar and Demow are badly affected by flood. On the basis of Agro-eco-situation (AES), AES II, AES V and a part of AES I are affected by flood (Table 2). On an average 29.32% of farm families and 4.46% of cropped areas within the respective blocks have been affected by flood.
Table 2:
Name of blocks Occurrence of Flood Year in which affected Severity (M/S/VS) * % cropped area affected Livestock mortality % of farm families affected
Gaurisagar, Sivasagar, Demow and Nazira Flood 2000-01 MS 3.52 Nil 26.26
Gaurisagar, Sivasagar, Demow and Nazira Flood 2001-02 MS 3.92 Nil 30.20
Gaurisagar, Sivasagar, Demow and Nazira Flood 2002-03 S 5.30 Nil 32.26
Gaurisagar, Sivasagar, Demow and Nazira Flood 2003-04 S 6.29 Nil 35.31
Gaurisagar, Sivasagar, Demow and Nazira Flood 2004-05 S 9.01 Nil 31.64
Average       4.46   29.32
* Per cent cropped area affected is calculated on the basis of total geographical area of the block Source : Dept. of Agriculture, Sivasagar
M : Mild, S : Severe; VS : Very severe

Agro-ecological situation :

Sivasagar district lying in the Upper Brahmaputra Valley Agro-climatic zone which is characterized by the existence of hill, high land, plain and char areas. The soils of this zone is immature alluvial in char to mature ultisol in the piedmont high and hill areas. Considerable variations were observed in physiography, climate, soil, flood proneness, socio-economic condition and cropping pattern.
On the basis of these variations the district is again divided into 5 Agro-ecological situations excluding the forest and tea garden. They are :
  1. Alluvial flood free (AES I)
  2. Alluvial flood prone (AES II)
  3. High land (AES III)
  4. Hill areas (AES IV)
  5. Char area (AES V)
Alluvial flood free (AES I) :

  This AES consists of 128624.4 ha which is 57.02% of total block area of the district covering all 9 blocks (Table 2A). Some of the major crops and enterprises in this AES are rice, sugarcane, tea, vegetables, dairy, piggery, fishery, sericulture and sasi plantation. This situation is almost level and soil type is sandy loamy to clay in nature.

Alluvial flood prone (AES II) :

  This situation comprises 58,723.79 ha which is 26.03% of the total block area. This situation prevails in all the blocks except Sonari Development Block. Flood is regular features of this situation causing extensive damage to crops and livestocks of the farmers. Some of the crops and enterprises are rice, rape and mustard, livestock and fisheries.

High land (AES III) :

  Total area under this AES is 23965.24 ha which is 10.6% of the total block area. This situation prevails in the blocks of Nazira, Amguri, Sonari, Pachim Abhaypur and Sapekhati. Some of important crops and enterprises are rice, pulse, horticulture, animal husbandry, sericulture and tea plantation.

Hill areas (AES IV) :

  Only 4840.25 ha of land under this AES which is 2.15% of total block area of the district. This situation prevails in the part of blocks of Nazira, Amguri and Sonari. Animal husbandry, horticulture and vegetables are some of important ventures in this situation.

Char area (AES V) :

  This situation confined mostly on river bank of the mighty Brahmaputra. This situation consists of 9434.1 ha which is 4.18% of the total block area. This situation prevails on the blocks of Sivasagar, Demow and Gaurisagar. Some of the important commodities are rice, wheat, mustard, pulses, horticultural crops, livestocks, etc.

   
   
Join Now!