Salt migration characteristics of silt loam soil by rainstorm Transportation processes and rates of heavy metals in an artificial rainstorm runoff under different land use types Relationship between shallow landslide erosion and vegetation in the Ziwuling forest area: a case study of the “7·21” disaster in Fuxian County Effect of unsymmetrical cutting along both river slopes on rainstorm-runoff process Effectiveness of pine roots on elements transport of loess soil during the heavy rainstorm on the Chinese Loess Plateau