Makkasan Makkasan swamp wetland project is a large swamp in the heart of Bangkok. The total area of about 92 acres of wetland water bodies in the area of plant Makkasan Railway Railway of Thailand. State Railway of Thailand, which was dug up in 2474 to serve as a source of water and wastewater. Including oil from Makkasan train factory. Make shallow marsh Makassar The sedimentation of suspended solids In addition, the marshes have Makkasan slums