Physiography refers to the study of surface landform charactristics. Physiography on Nepal has been mainly divided on the basis of river, felief, structure, altitude and georaphical distribution.
Nepal has diverse geological and geographical structure. The country has thousand of rivers flowing from north to south forming gorges, river basins and valleys. There is a maximum relief, steep slope and rugged terrain that have resulted in distinct landforms and topography. For the sake of convenience, the physiography of Nepal is divided as high Himal, High Mountain, Middle Mountain, Siwalik and Tarai from north to south.
The Tarai is the flat land velow 300m elevation formed by alluvial deposition. The Siwalik, Churiya, lies just abobe Tarai. It ranges from 300-900 metre elevation in general. It is formed with conglomerates.
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