| 摘要: |
| 利用人工模拟降雨试验,研究了不同耕作管理措施对坡耕地降雨入渗的影响,并采用有限差分法对入渗过程进行了数值模拟.结果表明,土壤入渗速率的计算值与实测值吻合较好,且耕作管理措施可明显增加坡面土壤的水分入渗,在相同入渗时间情况下,土壤稳渗速率大小排序为等高耕作＞人工掏挖＞人工锄耕＞直线坡,在中小坡度和中小雨强条件下,这种特征表现更为显著. |
| 关键词: 坡耕地 降雨入渗 耕作管理措施 数值模拟 |
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| 基金项目:中科院知识创新工程项目(KZCX1-06-01)；黄河基金(2001-0303) |
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| Effect of different tillage management measures on rainfall infiltration of slope farmland |
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| Abstract: |
| A rainfall simulation experiment was carried out to assess the effects of different tillage management measures on rainfall infiltration of slope farmland,and the process of soil infiltration was simulated by using finite differential method.The results showed that soil infiltration rates by calculated is consistent with the experimental results for soil infiltration rates,and tillage management measures could remarkably improve soil infiltration rates.Under the experimental situation with same infiltration time,soil stable infiltration rate for contour tillage > artificial digging > artificial hoeing > linear slope.The effect of different tillage management measures on infiltration rate is more efficient for the condition of the less slope gradient and rainfall intensity. |
| Key words: slope farmland infiltration tillage management measure numerical simulation |
