耕作措施对土壤入渗产流影响的实验研究

采用人工模拟降雨和室内分析相结合的方法,研究了黄土区不同耕作措施对降雨入渗的影响。结果表明：①不同耕作管理措施对降雨入渗的影响效用不同,在相同雨强和坡度下,降雨入渗速率表现为：耙耱地〉人工掏挖〉直线坡,在中小雨强和较短滞后情况下,这种情况表现更为显著;②不同耕作管理措施对降雨产流的影响效用不同,在相同雨强和坡度下,产流滞后表现为：耙耱地〉人工掏挖〉直线坡,在中小雨强和较短滞后情况下,这种情况表现更为显著;③根据水量平衡原理,得出了不同耕作管理措施不同坡度下入渗及产流滞后随雨强的变化关系式。上述结果为黄土高原坡耕地水土流失的治理和管理,提供了一定的理论依据。

Experimental Study of the Effect of Cultivation Measures on Soil Infiltration Flow

The influence of different cultivation measures on rainfall infiltration in the loess area was studied by using artificial simulation rainfall combined with laboratory analysis.The results show that: ①The effect on rainfall infiltration is different under different tillage management measure.In the same rainfall intensity and slope,the rainfall infiltration rate is showed: harrow land >artificial dig >linear slope;this kind of situation is more obvious in the case of light rain intensity and shorter lag;②The effect on rainfall runoff is different under different tillage management measure.In the same rainfall intensity and slope,the runoff lagging is showed: harrow land >artificial dig >linear slope;this kind of situation is more obvious in the case of light rain intensity and shorter lag;③The relationship formula of infiltration and runoff lagging with rainfall intensity under different slope by using different tillage management measure was concluded based on water balance theory.The above results provide certain theory evidence for control and management of water and soil loss in slope farmland in the Loess Plateau.