摘要
在干旱缺水、水土流失严重的黄土高原地区,地面垄沟是控制侵蚀、保持水分的有效措施.而不同垄沟形式将直接影响沟中径流量和土壤水分状况.本文设计了两种不同垄上覆盖材料和三种不同垄沟比的6组试验处理,通过2002与2003年降水季节的连续田间试验观测.结果表明:覆膜垄沟(MR)的临界产流降雨量低于不覆膜垄沟(ER),约为不覆膜垄沟(ER)的10%,两种垄沟的临界产流降雨量分别为0.4 mm、4.6 mm.覆膜垄沟(MR)的径流效率远高于不覆膜垄沟(ER),覆膜垄沟(MR)与土垄的平均径流效率分别在45%～70%与5%～6%之间变化.
On the Loess Plateau of China where water stress and soil erosion is severe, ridge and furrow system （RFS） could be an effective measure to control soil erosion and retain rainfall. Different ridge and furrow systems directly affected the runoff quantity to the furrow and thus soil water condition. Six land surface designs of three kinds of ridge-to-furrow ratios combined with mulching or bare treatments were tested for two years. The experimental results showed that the critical rainfall for runoff occurring for the mulched ridges （MR） was 0.4 mm but for the bare ridges （BR） was 4.6 mm; the average runoff-collecting efficiency was 5%-6% for BR and 45%-70% for MR.
出处
《中国沙漠》
CSCD
北大核心
2005年第6期910-915,共6页
Journal of Desert Research
基金
国家"973"计划课题(2002CB111502)
中国科学院"西部之光"人才培养计划资助
关键词
黄土高原
垄沟
垄沟比
径流效率
Chinese Loess Plateau
ridge and furrow system （RFS）
bare ridge
mulched ridge
runoff-collecting efficiency
