This book provides an opportunity to understand the cause-effect relation between water resources development interventions and brackish water ecosystems in a developing country like Bangladesh. Because of the increasing water development interventions in Bangladesh, brackish water ecosystems have become a great concern at the present time. Being located in the south-eastern coastal area of Bangladesh, the Bakkhali River faces such type of threat. Due to the rubber dam construction across the river, the brackish water zone has been cut-off by establishing a distinct fresh and saline water...