黄土坡面不同土地利用与覆盖方式的产流产沙效应

研究不同地类坡地产流产沙规律,对定量评价林草措施的水土保持效益具有重要的意义。利用布设在山西省吉县蔡家川流域的10个径流小区资料,分析了不同土地利用/覆盖方式对产流产沙的影响,研究结果表明:草地拦蓄暴雨功能明显小于灌木与乔木林地;农地(坡耕地)是坡面侵蚀的主要土地利用类型,天然灌木林与混交林的防蚀功能明显大于人工纯林;水土保持林地拦蓄径流明显大于经济林。

Effects of different land uses and land mulching modes on runoff and silt generations on Loess slopes

The paper studies the patterns of runoff and silt generations in different types of slopland, which are of great importance to quantitatively evaluate the efficiency of water and soil conservation by forests and grasses. Using the data of the ten runoff plots located in the Chaijiachuan catchments of Jixian county, Shanxi, the paper analyzes the effects of different land uses and land-mulching mode on runoff and silt generations and elicits that grassland has a weaker capacity to retain rainstorm water than arbor and shrub forestlands do; farmland(slope farmland) is the major land type suffering from slope surface erosion, and natural arbor forests and mixed forests have remarkably higher erosion-preventing capacity than purely artificial forests; the forests of water and soil conservation have a remarkably higher runoff-impounding capacity than cash forests.