I see, I was thinking in hydroponics, both terms are often associated.

I'm sceptical when I see agriculture wrapped in hype terms. I think that engineering will play a bigger role here. Forest restauration and dams that would retain soil and water and absorb part of the hit will help.

Just to speculate about possible partial solutions, I think that in plain areas subject to frequent flooding they could erect small hills and build the houses over those to defend homes. As floods will increase in the future, the sooner they start, the better.

They could also to dig a system of storm ponds. So will have many soil to build the hills. Moving soil can be done in the same step. The base of the hills should be heavily reforested to retain the soil in place. As a bonus you increase the forested area and help nature to flourish.

The other solution would be to dig concrete canals for as water highways but that would remove the main reason why people lives there: Very rich soil for agriculture plus water. You don't want all of this water lost in the sea

Storm ponds would play a benefit role to store water for the dry season also.