【摘要】 黄土丘陵沟壑区地形复杂,坡陡沟深,水土流失严重,为缓解黄土丘陵沟壑区边坡水土流失严重的问题,以内蒙古清水河县段兰窑流域黄土边坡为研究区,采用3种植被毯措施:豆科植物和禾本科植物混播（以下简称豆禾混播）比例为1∶1+椰丝毯（L₁G₁）、豆禾混播比例为1∶2+椰丝毯（L₁G₂）和豆禾混播比例为2∶1+椰丝毯（L₂G₁）在30°,35°,40°和45°边坡设置径流小区,分析该区域不同自然降雨条件和坡度对边坡产流与产沙量的影响。结果表明:（1）铺设植被毯可以有效的减少黄土边坡产流产沙量。（2）当降雨强度为1～5 mm/h时,各植被毯措施的产流量和产沙量随着坡度的增加呈上升趋势;当降雨强度为30～50 mm/h时,各植被毯措施的产流量和产沙量随着坡度的增加呈先增加后减小的趋势,坡度为40°时出现峰值。（3）3种植被毯措施的减流效益大小依次为L₁G₁（75.11%）>L₁G₂（49.3%）>L₂G₁（48.11%）;3种植被毯措施减沙效益大小依次为L₁G₁（87.96%）>L₁G₂（60.96%）>L₂G₁（58.95%）。说明在黄土丘陵沟壑区L₁G₁是一种有效的边坡水土流失治理措施。更多还原

【Abstract】 In order to alleviate the serious soil and water loss of slope in Hilly-Gully Loess Region, this paper took DuanLanyao drainage loess slope in Qingshuihe County of Inner Mongolia as the research area, and adopted three vegetation carpet measures: the mixed planting of Legumes and Gramineae plants with a ratio of 1∶1+coconut carpet（L₁G₁）, the mixed planting ratio of 1∶2 + coconut carpet（L₁G₂）, and the ratio of 2∶1 + coconut carpet（L₂G₁）. Runoff plots were set up with slope gradients of 30°, 35°, 40° and 45°. The effects of different natural rainfall conditions and slopes on slope runoff and sediment yield were analyzed. The results showed that:（1） Vegetation carpet could effectively reduce the runoff and sediment yield of Loess slope.（2） When the rainfall intensity was 1～5 mm/h, the runoff and sediment yield of vegetation carpet measures increased with the increase of slope gradients; when the rainfall intensity was 30～50 mm/h, the runoff and sediment yield of vegetation carpet measures increased first and then decreased with the increase of slope gradients, and the peak value appeared when the slope was 40°.（3） The benefits of three vegetation carpet measures were L₁G₁（75.11%）>L₁G₂（49.3%）>L₂G₁（48.11%） and L₁G₁（87.96%）>L₁G₂（60.96%）>L₂G₁ （58.95%）, respectively. It could be concluded that L₁G₁ was an effective measure to control soil and water loss of slope in the Hilly-Gully Loess Region.更多还原