论文部分内容阅读
滞后作用的存在，不但影响降雨过程中的入渗特性，而且影响产流量。该文通过对入渗产流中的滞后机制分析，建立了考虑滞后作用的坡地降雨入渗产流模型。利用黄土高原沟壑区典型小流域坡地天然降雨入渗－ 产流的实测资料对模型进行了检验，结果表明： 在降雨入渗－产流过程中， 滞后作用加快入渗速率， 减少径流量； 滞后模型使土壤含水量、产流过程接近实测值。因此，在降雨入渗产流过程中考虑滞后作用的影响是必要的。
The existence of hysteresis not only affects the infiltration characteristics during rainfall, but also affects the runoff. Based on the analysis of hysteresis mechanism in infiltration and runoff, a model of rainfall infiltration and runoff with slope effect is established. The model was tested by using the measured data of natural rainfall infiltration and runoff in the typical small watershed in the gully region of the Loess Plateau. The results show that the hysteresis accelerates the infiltration rate and reduces the runoff during the process of rainfall infiltration and runoff. The model makes the soil water content, the flow process close to the measured value. Therefore, it is necessary to consider the effect of hysteresis in the process of rainfall infiltration and runoff.