This paper investigates farmers crop adaptation processes in response to three recent devastating floods in Islampur, a case-study area in rural Bangladesh. The paper reports a multi-method research project which comprised a questionnaire survey, focus-group discussions and interviews with agricultural block supervisors. The author analyses three recent severe floods in Bangladesh, occurring in 1988, 1995 and 1998, and reviews the adaptation techniques and strategies embraced by the same group of farmers in order to survive the more devastating inundations that occur from time to time. The study concluded that vulnerable farmers are highly resilient and, with appropriate support, their adjustments can be sustainable. This enquiry showed that in the face of climate change both the inclusion of autonomous adaptations into planning and policy-making and the enhancement and support of community-based adaptation can be effective in ensuring the survival of riverine farming systems. This case study can be considered as a key reference case in regard to vulnerable locations in the Ganges-Brahmaputra-Meghna mega-delta basin, particularly in respect to Bangladesh.