Intensive rice production is the predominant cause for the loss of biodiversity and resilience to climate change in the Vietnamese Mekong Delta. Today, less than 5% of the natural wetlands of the Delta remain. In order to intensively grow rice in the upper-delta deep flood zone, traditional low dyke systems that have supported 2 rice crops in a year while allowing floods to enter the dyke system in the flood season, have been converted into high dykes that displace the floods so that a third rice crop can be grown.