Abstract:This study explored the impact of the short-duration high-intensity rainfall on the erosion and sediment yield of typical karst slope farmland. The results would provide theoretical basis for the monitoring and preventing of extreme weather and soil erosion in slope farmland of karst area. The artificial indoor simulated rainfall experiment was conducted to study the erosion and sediment yield characteristics of karst slope farmland under the short-duration high-intensity rainfall. Results showed that:(1) Under the short-duration high-intensity rainfall, the surface sediment transport modulus and sediment yield of karst slope farmland increased with the increase of rainfall intensities, but there was no obvious change in the under-ground sediment transport modulus and sediment yield. The soil erosion of slope farmland was dominated by the surface, and the critical rainfall intensities of surface sediment yield were between 30~50 mm/h. (2) The proportion of surface sediment yield was greater than the underground when slope increased, and soil erosion was dominated by the surface. The transition slope of sediment yield was between 15°~20°. At 70 mm/h rainfall intensity and 5° slope, rainfall intensity might have a "negative effect" on underground soil erosion. (3) The characteristics of erosion and sediment yield on karst slope farmland were closely related to rainfall intensities and slope, but the rainfall intensity factor played the leading role. High-intensity rainfall mainly affected surface soil erosion. Therefore, the soil erosion control of karst slopes farmland should be dominated by the surface. This study is helpful to understand the impact of short-duration high-intensity rainfall on soil erosion of karst slope farmland, and to provide theoretical basis for coping with the extreme weather, controlling soil erosion, maintaining the healthy and sustainable development of the ecological environment in karst slope farmland.