Morphometric analysis of relief on Jayankondam block, Ariyalur district, Tamilnadu, India

Morphometric parameters likespatial distribution of relief (contour lines) and drainage basin (Stream area) was studied in Jayankondan block. The Jayankondan block lies between 10⁰54’N to 11⁰30’N latitude and 78⁰40’ to 79⁰30’ longitude with an area of 343.81 sq.km. It is bounded on the south by T, palur and Ariyalur block and on the north by on the western side by andimadam and sendurai blocks. The Jayankondam block consists of 32 panchayat villages. Morphometric studies involvesthe evaluation of measurement of various profiles such as (superimposed, composite and projected profile), height histogram, hypsometric curve, relative relief map, average slope map. Analysis of various drainage parameters namely ordering of the various streams and measurement of area of basin, perimeter of basin, length of drainage channels, drainage density (Dd), drainage frequency, bifurcation ratio (Rb), drainage texture (T), Roughness index and ruggedness was determined which are used to describe and compare the basins of different sizes. A major objective of morphometrics is to statistically determining the factors that affect relief features. No segment of the basin is gauged and only piecemeal information on the basin is available as no research has been carried in this direction.