Vol. 10, Special Issue 11 (2021)

Author(s):
P Ponnuchakkammal, R Lalitha, A Raviraj, M Nagarajan and A Bharani

Abstract:
Watershed is the fundamental management tool to conserve the soil and water ecosystem and need to manage based on their requirement for betterment of ecosystem. The demarcation of the watershed divide becomes more important for development and management of the watershed. Ayyar Watershed was taken into consideration of this study. Ayyar River is one of the tributaries of Kavery River. The Ayyar watershed boundary was delineated using the Arc Hydro Tool and ArcSWAT software. The two watershed divides were compared. There are some minor differences between the two watershed divide. According to the analysis of watershed features, the area of the watershed derived from SWAT is 1190.93 km² and Arc Hydro Tool is 1187.73 km² which is 0.27% smaller than SWAT derived watershed boundary. The convex hull type geometry gives the reliable data on both watershed boundaries.