The most conspicuous geomorphic feature of the Sunderbans is a low, alluvial plain intersected by an intricate network of tidal rivers, creeks, estuaries and minor tidal-water courses. The Thakuran River is one of the most important tidal rivers of a meso-macrotidal regime having no perennial freshwater supply, and it forms a drainage basin covering about 900 km2 in area. The meandering and bifurcating channel systems of the Thakuran Basin have given rise to the formations of various islands mainly by the settling down of particles on the river bed and also by being cutting off from the mainland due to the bifurcation of channels. Construction of embankments to prevent severe bank erosion has resulted in the changing courses of the Thakuran River and the hindrance to growth of mangroves along its river banks.