Global J. Environ. Sci. Manage. 5(4): 471-484, Autumn 2019 *Corresponding Author: Email: vicky@nitmanipur.ac.in Phone: +903 6106997 Fax: +903 85-2413031 Global Journal of Environmental Science and Management (GJESM) Homepage: htps://www.gjesm.net/ ORIGINAL RESEARCH PAPER Future climate change impact on hydrological regime of river basin using SWAT model V. Anand*, B. Oinam Department of Civil Engineering, Natonal Insttute of Technology Manipur, India Hydrological components in a river basin can get adversely afected by climate change in coming future. Manipur River basin lies in the extreme northeast region of India nestled in the lesser Himalayan ranges and it is under severe pressure from anthropogenic and natural factors. Basin is un-gauged as it lies in remote locaton and sufering from large data scarcity. This paper explores the impact of climate change towards understanding the inter-relatonships between various complex hydrological factors in the river basin. An integrated approach is applied by coupling Soil and Water Assessment Hydrological Model and Hadley Center Coupled Model based on temperature, rainfall and geospatal data. Future representatve concentraton pathways 2.6, 4.5 and 8.5 scenarios for 2050s and 2090s decades were used to evaluate the efects of climatc changes on hydrological parameters. Both annual mean temperature and annual precipitaton is predicted to be increased by 2.07 o C and 62% under RCP 8.5 by the end of 21 st century. This study highlights that change in meteorological parameters will lead to signifcant change in the hydrological regime of the basin. Runof, actual evapotranspiraton and water yield are expected to be increased by 40.96 m 3 /s, 52.2% and 86.8% respectvely under RCP 8.5. This study shows that water yield and evapotranspiraton will be most afected by increase in precipitaton and temperature in the upper and middle sub- basins. Diferent region within the basin is likely to be afected by frequent landslides and food in coming decades. ©2019 GJESM. All rights reserved. ARTICLE INFO Artcle History: Received 11 April 2019 Revised 10 August 2019 Accepted 03 September 2019 Keywords: Climate change Hydrologic response units (HRUs) Landuse/landcover (LULC) Representatve concentraton pathways (RCPs) Soil and water assessment tool (SWAT) ABSTRACT DOI: 10.22034/gjesm.2019.04.07 NUMBER OF REFERENCES 35 NUMBER OF FIGURES 9 NUMBER OF TABLES 7 Note: Discussion period for this manuscript open untl January 1, 2020 on GJESM website at the “Show Artcle.