The objective of this study was to estimate each component of water resources based on water budget formula for a small basin in Northern Shaanxi Province. Liudaogou basin, which is located at wind-water erosion crisscross region in the Northern Loess Plateau, was chosen as the study area. Each component of the annual water budget was estimated through analysis of observed hydrological data and numerical result of surface runoff. Daily water consumption and irrigation water were added into the water budget in order to consider the contribution of human activity. The results indicate that evapotranspiration, runoff, change of water storage accounted for 74.5%, 21.5%, and 0% of the total water budget, respectively, and daily water consumption and irrigation water accounted for 2. 8% and 1. 2%, respectively. The results of this study could provide a basis for sustainable water development and utilization in Northern Loess Plateau, where water resources are extremely limited.