Abstract:
The
concept
of
geomorphic surfaces can be applied to the study of macro- and
micro-landform formation, their formative processes and evolution. It indicates the erosional or
depositional surfaces in a “available relief". The Kalu Ganga, the focus of this study, is the second
largest river basin in Sri Lanka, with an approximate area of 2,688 km? and a mean flow of 280
m/sec. The average annual rainfall in the basin is 11,303 million m?, of which 8,184 million m? is
lost as runoff. Based on altitude (between ms] and 1,830 m), as well as relief and drainage orders,
seven geomorphic surfaces can be recognized in the Kalu Ganga basin.
