1. DEEPTHI B P - Dept. of Civil Engineering, DSATM, India.
2. PUSHPA TUPPAD - Dept. of Environmental Engineering, Sri Jayachamarajendra College of Engineering, India.
3. K S LOKESH - Dept. of Environmental Engineering, Sri Jayachamarajendra College of Engineering, India.
The developmental activities of any region are governed by the availability of the water resources. Alteration in the land use and landcover (LULC) could be due to both natural and anthropogenic activities, which considerably effects both soil and water resource. Understanding the effects of change in land use on hydrology of a watershed is vital for its conservation and development planning. This study intends to simulate the impacts of land use change on hydrological components of different systems of the watershed using Soil and Water assessment tool (SWAT) model. For different land use layers, streamflow was calibrated and validated from 2002 to 2014. Significant changes were noted with respect to decreased forest area and increased agricultural and urban areas increasing the surface runoff and water yield while diminishing the evapotranspiration and ground water recharge rate. Modification in land use and hydrological variation due to it was more prominent at sub watershed scale compared to watershed scale. In the study area, western part of it exhibited much change in LULC which showed significant impact on the regional hydrological components. This study could help to provide quantitative information on change in hydrological components in response to land use change in watersheds especially enduring the rapid loss of forest and undergoing cultivation and urbanization. This shall guide the watershed managers and decision makers to develop required strategies for water resource management.
Hydrologic components, Impact, Land use/landcover, Simulation, Sub watershed, SWAT, Watershed.