Guwahati, August 19: Several allegations have been raised against China, including China not even providing the hydrological data on Brahmaputra from May 15 to October 15, to be a factor behind the Assam floods. The authenticity in that is still unknown but one can be sure that excess rainfall is the major cause of the recent floods.
According to statistics published by the Indian Meteorological Department (IMD), five districts of Assam experienced excess rainfall during the period from June 1 to August 16, 2017. The districts are Chirang, Lakhimpur, Sonitpur, NC Hills and Karimganj. Chirang received 2465.5 mm rainfall, which is 51% above normal; in 2016, Chirang had received had 2110.8 mm rainfall in the months of June, July and August. Lakhimpur experienced 28% excess rainfall, Sonitpur 25%, NC Hills 11% and Karimganj 29%. It must be noted that compared to the previous year, Lakhimpur had 196.6 mm more rainfall, Sonitpur 562.1 mm, NC Hillls 443 mm and Karimganj 447.3 mm respectively.
Even in the districts which had deficient rainfall, which include Baksa, Nalbari, Dhubri, Morigaon and Nagaon, some had more rainfall compared to the previous year except for. In 2017, Baksa had 40% less rainfall than normal, Nalbari 27%, Dhubri 22%, Morigaon 22% and Nagaon 29%. Baksa had 49.2 mm and Morigaon 25 mm more rainfall than previous year.
From the above statistics, it can be clearly made out that the recent flood that ravaged Assam was caused by the rain during the period from June to August. Even in areas which has deficient rainfall this year, the downpour was more than last year’s. Districts like Dhubri and Morigaon were severely affected by flood though they had deficient rainfall. The reason here can be that Assam being a low-lying region as compared to her Northeastern hilly counterparts, the state fell prey to the water received in excess rainfall in the neighbouring states.
It must be noted that the East Garo Hills received 2340.5 mm rainfall which is 96% more than the normal, Imphal (West) saw an increase of 127% in rainfall whereas Lower Dibang in Arunachal Pradesh saw a drastic increase of 295%. The same increased by 132% in Lunglei, Mizoram.