Abstract
Sand-filled splash cups were used to study the erosivity of rainfall and throughfall in the humid subtropics of southeast China. Our results showed that the splash cup measurements yielded precise and reproducible results both under open field conditions and under forest vegetation. The splash cups were exposed to forest stands of different age and to selected species (Schima superba, Castanopsis eyrei) in the Gutianshan National Nature Reserve (GNNR). The measurements in the open field revealed a close relationship between unit sand loss (g m− 2), rainfall amount (mm) (R2 = 0.94) and maximum rainfall intensity (mm h− 1) (R2 = 0.90). The highest correlation was obtained between unit sand loss (g m− 2) and the average of the five highest five minute interval rainfall intensities (mm h− 1) (R2 = 0.96). This underlines the reliability of the splash cups used.
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