Bangladesh Unnayan Parishad (BUP), a research organisation, held the briefing at the Jatiya Press Club lounge.

BUP experts quoting climate forecasts said 50 percent more rainfall than usual is likely from July 29 to August 8 in Brahmaputra and Ganges basins.

"If it occurs, onrush of waters will inundate many parts of the country before the recession of the present deluge," said BUP Chairman Kazi Kholiquzzaman Ahmad.

Ahsan Uddin Ahmed, director of BUP's Centre for Water and Environment, quoting various technical forecasts said the main flood is yet to come.

"The government must not get confused that the flood is over. Because flood may continue up to September 10," he added.

The BUP experts said if flood continues to rage on, aman cultivation would be badly hit.

They said if the government does not take prompt action, it will not be able to recover the huge loss in aman production.

Dr Zahurul Karim, former agriculture secretary, said the current flood is likely to affect 60 percent of total aman production in 42 flood-hit districts. He suggested for cultivating the late variety rice after flood waters recede. In that case, seedbeds targeting late variety must be prepared, he added.

BUP experts expressed concern over the government not having enough buffer stock of seeds.

A BUP study found the intervening period between two disastrous floods is getting shorter at an alarming pace. Earlier, the country experienced serious flooding in 1998, 1988, 1974 and 1955.

"This time serious flood came only in six years of the previous one. Earlier, the time gap between two serious flooding was 10 years, 14 years and 19 years," BUP Chairman said quoting study findings.

The main reason for such worrying phenomenon is global climate change resulted from greenhouse effect, Kholiquzaman said. He expressed his regrets that the political and policymaking groups are not aware of such developments.

About 92 percent waters of Ganga-Brahmaputra-Meghna region flows through Bangladesh though it covers only seven percent of the region. That is why, Bangladesh needs to promote an exchange of information regionally to have better preparations, Kholiquzzaman observed.

Besides, the BUP chairman recommended infrastructural and non-infrastructural flood management as well as institutionalisation of social programmes to confront flooding in future.