An assessment of the anthropogenic impacts on streamflows in the himayat sagar catchment, India using SWAT

Abstract

Streamflows in the Himayat Sagar Catchment (HSC), Andhra Pradesh, India have been declining for the last two decades due to major anthropogenic influences including change in land use, increased hydrological structures and increased groundwater extractions in the catchment. The major focus of this paper is to assess the historical and future impacts of hydrological structures by understanding the interactions and dynamic nature of hydrological pathways in the catchment. This study characterises the different hydrological structures and quantifies their relative impacts on the streamflows of HSC. As part of the study, an SWAT model has been developed and calibrated for 7 years and then valida..