Definition
Rainfed Wetland wetland irrigation is dependent on rain water (do not have irrigation systems).
Tidal wetland is a wetland which irrigation depends on rivers that are affected by the ebb and flow of sea water.
Polder land is a wetland that existed at the river delta irrigation influenced by the river water.
Land is swampy wetland irrigation from reclaimed swamp valley (not tidal)
Swamp land is usually cultivated paddy land and irrigation comes from the seepage swamps.