Climate change and land use changes affect streamflow in the Xiying River basin in China. The study used a model to separate the impacts of climate and land use on streamflow. Results show that from 1990 to 2008, streamflow increased by 102.8% due to climate change, while land use changes caused a 2.8% decrease. In the future (2010-2069), streamflow is projected to decrease by 5.4% to 21.2% compared to past data.