Li Yi, female,19741/born in June, Shaanxi Wuren, Han nationality, associate professor, master tutor. In 2002, he received a doctorate in hydrology and water resources from Xi University of Technology, and in 2005, he worked as a postdoctoral fellow at the Institute of Geographical Sciences and Resources, Chinese Academy of Sciences. Winner of "Young Academic Backbone Support Program" of Northwest A&F University. The lectures include stochastic hydrology, specialized foreign languages, water quality and analytical chemistry, water conservancy and hydropower planning, water environment quality monitoring and evaluation, water disasters, urban hydrology, soil physics and water conservancy and hydropower planning. Main research contents 1] Spatial variability of soil physical and hydrological properties in Heihe River Basin 2] Coupled migration of soil water, salt and heat under plastic film mulching and open field conditions; 3) Rainfall infiltration and runoff generation process on loess slope under vegetation cover 4) Ecological water demand of vegetation and its spatial distribution in northwest China 5) Study and simulation of infiltration and evaporation process of water-repellent soil 6) Spectral analysis and prediction of soil hydraulic properties.