Evaluation of Multi-scenario Water Yield Based on the InVEST Model in a Catchment on the Loess Plateau, China

The Loess Plateau is the core region of China's ecological civilization construction. However, due to the basin's geographical location and environmental factors, the majority of areas are dealing with low river runoff, water scarcity and other issues. The InVEST model is established in the Upper Basin of Beiluo River, one of primary areas affected by the greening of the Loess Plateau, and the water yield is simulated under different scenarios, with the following conclusions drawn: the water yield of the basin increased in time from 1995 to 2015, and increased in space from northwest to southeast, which was consistent with the temporal and spatial distribution of precipitation. Climate change is the most important factor influencing water yield change in the basin, accounting for 99% of total water yield. Changes in land use have little effect on the water yield. The increase in cultivated land will increase the water yield, while the increase in grassland will decrease it. The findings of this study can be used to guide water resource management in the Upper Basin of Beiluo River.