(f)
Figure 10 Spatial variation of rainfall during month of (a)
May, (b) June, (c) July, (d) August, (e) September, (f) October
It can be depicted from the figure that in May, (Figure 10.a) there is a
lot of variation of rainfall with space in the whole region; the amount
of rainfall is as high as 552mm in Karimganj to relatively low
precipitation amounting to only 125 mm in regions of Karbi Anglong.
Middle Assam receives 125 mm-172 mm of rainfall while upper Assam
receives 267 mm to 315 mm of rainfall. The region receives the maximum
rainfall during the months of June-August and shows a large variation in
amount of precipitation occurring in the region along with the space
(Figure 10. b, c, d). The monthly average rainfall received during June
and July is almost same and varies from 170 mm to 850 mm. regions close
to Lakhimpur and Kokrajhar receives the maximum rainfall which amounts
to 800 – 850 mm in each of the months of June and July, while in August
the same district receives the rainfall of about 700mm. Districts of
middle Assam receives relatively a lesser amount of rainfall (170 mm –
190 mm) when compared to districts like Lakhimpur and Kokrajhar. There
is a significant decrease in the amount of rainfall received in October,
as this month is considered as offset for monsoon in Assam. The Figures
below show the spatio-temporal variation in the region during
non-monsoon season i.e. November-April.