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作为土壤性质的一个方面,土壤斥水性可增加局部产流和加剧土壤侵蚀,引起了学者的广泛关注。本文在回顾土壤斥水性的产生原因及时空变化的基础上,总结了近10年土壤斥水性对产流影响的研究结果,主要包括:①通过减小土壤基质势梯度,降低坡面入渗率,增加坡面产流量,并改变产流方式;②土壤斥水性的持续时间和强度是其影响坡面产流过程的关键因素,直接决定产流的时间和数量;③土壤斥水性对产流的影响具有尺度效应,在点、径流小区尺度上,斥水性可增加产流量,但在较大尺度上对产流量的影响不显著。当前,对土壤斥水性的形成及变化规律、斥水性土壤的空间分布和对产流影响的定量研究还不足,尚需要进一步深入,为更好地解释水文过程变化提供理论依据。
As one aspect of soil properties, soil water repellency can increase local runoff and aggravate soil erosion, aroused widespread concern of scholars. Based on the review of the causes and the spatial and temporal changes of soil water repellency, this paper summarizes the research results about the effects of soil water repellency on runoff in recent 10 years, including: (1) reducing the infiltration rate of slope by reducing the gradient of soil matrix potential , Increasing the runoff yield and changing the mode of runoff; (2) the duration and intensity of soil water repellency are the key factors affecting runoff yield, which directly determines the time and quantity of runoff; (3) The effect of scale has a scale effect. At the point and runoff plot size, water repellency can increase runoff, but the effect on runoff is not significant at larger scale. At present, the formation and variation laws of soil water repellency, the spatial distribution of water-repellent soils and the quantitative study of the effects on runoff are not enough yet, and further studies are needed to provide a theoretical basis for better explaining the hydrological process changes.