Mathematical formulations for layered soil profiles and corresponding parameterization to improve performance of the Green‐Ampt model (GA) have not always shown accurate. We evaluated GA maintaining its assumption of saturated flow but calibrating the effective matric suction at the wetting front (h_f) by damping the initial matric suction (h_i). The proposition was evaluated comparing cumulative infiltration simulated by GA to that simulated by Hydrus‐1D for five soils from three texture classes, three initial matric suctions, and five 24‐h water supply regimes. For each case, GA was run with a decreasing series of 20 values of h_f from the initial matric suction (10, 100, or 1000 cm) to values near 1 cm. To minimize the relative error (RE) between cumulative infiltration simulated by GA and Hydrus‐1D for the 24‐h period we found the required damping of h_f to be dependent on soil type, water supply regime and initial matric suction, the latter being the most important factor. The calibration of h_f was efficient to approach GA predictions to numerical Hydrus‐1D simulations, even for cases with alternating ponding and non‐ponding conditions. Results suggest a large reduction of wetting front matric suction h_f may be necessary to approach cumulative infiltration predicted by GA to corresponding Hydrus‐1D predictions, especially during rainfall events that do not imply in continuous ponding. Taking h_f somewhere between 1 and 3 cm, values of RE of cumulative infiltration during the first 24 h were below 10% for all cases, independent of soil type, rainfall characteristics or initial water content.

中文翻译：

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绿池湿润前吸力的标定，适用于积水和无响应的渗透情况

分层土壤剖面的数学公式以及用于改善Green-Ampt模型（GA）性能的相应参数化方法并不总是准确的。我们评估了GA保持其饱和流量的假设，但通过阻尼初始矩阵吸力（h _i）来校准润湿前沿（h _f）的有效矩阵吸力。通过比较GA和Hydrus-1D对三种质地类别，三种初始基质抽吸和五种24-h供水方式的五种土壤的累积入渗进行了评估，对这一提议进行了评估。对于每种情况，GA都以递减的20个h _f值序列运行从初始矩阵吸力（10、100或1000 cm）到接近1 cm的值。为了最小化由GA和水蛇-1D为24小时的期间，我们发现，所需的阻尼模拟累积渗透之间的相对误差（RE）ħ _˚F依赖于土壤类型，供水制度和初始吸力，后者具有最重要的因素。h _f的校准可以有效地将GA预测应用于Hydrus-1D数值模拟，即使对于交替考虑和无条件的情况也是如此。结果表明，湿润前基质吸力h _f大大降低将GA预测的累积入渗量推向对应的Hydrus-1D预测可能是必要的，尤其是在降雨事件中，这并不意味着连续积水。如果将h _f设置在1-3 cm之间，则在所有情况下，头24 h内累积渗透的RE值均低于10％，而与土壤类型，降雨特征或初始含水量无关。