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土壤入渗性能的确定对水文过程及其相关研究与应用具有重要的意义。该文在土壤入渗性能的水平土柱测量方法和Green-Ampt修正模型的基础上,推导出了Green-Ampt模型与修正模型之间的比例关系,进而提出了土壤入渗性能的速算模型。该计算模型在保证土壤入渗性能计算精度的前提下,计算过程较修正Green-Ampt模型有了很大的简化。将3种方法计算得到的土壤入渗率进行了比较,快速方法计算得到的土壤入渗性能与Green-Ampt修正模型计算得到的土壤入渗性能非常接近。在水量平衡原理的基础上得到3种方法计算结果误差分别为11.5%(Green-Ampt模型),0.66%(修正模型)和2.68%(快速计算模型)。表明快速计算方法具有很高的精度。新方法大大简化了修正模型的计算步骤。该文提出的土壤入渗性能速算法与水平土柱试验相结合,可以方便地应用于室内土壤入渗性能的测量,为水文循环/地表产流等相关研究提供便捷的土壤入渗性能计算工具。
The determination of soil infiltration performance is of great significance to the hydrological process and its related research and application. Based on the horizontal soil column measurement method and Green-Ampt correction model of soil infiltration capacity, the paper deduced the relationship between the Green-Ampt model and the revised model, and then put forward the fast calculation model of soil infiltration performance. Under the premise of ensuring the calculation accuracy of soil infiltration performance, the calculation process is much simplified than the modified Green-Ampt model. The soil infiltration rates calculated by the three methods were compared. The soil infiltration performance calculated by the fast method was very close to that calculated by the Green-Ampt modified model. Based on the principle of water balance, the errors of the three methods are 11.5% (Green-Ampt model), 0.66% (modified model) and 2.68% (fast calculation model) respectively. It shows that the fast calculation method has high precision. The new method greatly simplifies the calculation of the correction model. The proposed algorithm for soil infiltration performance combined with horizontal soil column test can be conveniently applied to the measurement of indoor soil infiltration performance and provides a convenient calculation tool for soil infiltration performance for related research such as hydrological cycle and surface runoff .