Abstract: This study presents hydrological
impacts of future climate change (CC) and land use/cover change (LUCC) for the
Srepok River Basin (SRB) in the Vietnam’s Central Highlands. The hydrology
cycle of this basin was reproduced using Soil and Water Assessment Tool (SWAT)
allowing an evaluation of hydrological responses to CC and LUCC. Future climate
scenarios of the 2015–2100 period under Representative Concentration Pathways
(RCP) 4.5 simulated by five General Circulation Models (GCMs) and LUCC scenario
in 2050 were developed. Compared to the reference scenario (1980–2005), future
LUCC increases the streamflow (0.25%) and surface runoff (1.2%) and reduces the
groundwater discharge (2.1%). Climate change may cause upward trends in
streamflow (0.1 to 2.7%), surface runoff (0.4 to 4.3%), and evapotranspiration
(0.8 to 3%), and a change in the groundwater discharge (− 1.7 to 0.1%). The
combination of CC and LUCC increases the streamflow (0.2 to 2.8%), surface
runoff (1.6 to 5.6%), and evapotranspiration (1.0 to 3.1%), and reduces the
groundwater discharge (1.5 to 2.7%) with respect to the reference scenario.
Moreover, the results noted that the water scarcity may happen in the
dry-seasonal months.