The hydraulic conductivity (k) of unsaturated soil overlying shallow groundwater was measured based on a new hydrologic theory with a higher accuracy and greater convenience. The hydraulic conductivity was obtained via the average accumulated water depth after a period longer than 24 h based on infiltration capacity data extension of the Horton and power law infiltration models considering the infiltration rate curve (IRC). The theory basically relies on a mathematical derivation of Darcy’s law and experimental tests. The field tests included double-ring infiltrometer tests, measurements of the groundwater depth, and collection of 26 undisturbed soil samples within a 67-km² area. Soil samples were selected with the Global Positioning System (GPS) and Geographic information system (GIS) to cover most of the area within the Mesopotamian region, which consists of Quaternary deposits in Hashymia, Central Iraq, whereas the lab tests included traditional k measurement methods. Statistical analysis was performed to estimate the convergence between the hydraulic conductivity values k_IRC and k_lab obtained by IRC and traditional tests, respectively. Statistically, the root-mean-square error (RMSE) was considered to determine the convergence constant (£). The most precise k_IRC values were obtained as the product of the final infiltration rate (f_c) and £ = 1.15, which is associated with RMSE value of 0.104. The k_IRC values were also compared to the obtained k_Lab values. It was concluded that the k_IRC values greatly converged to the lab-measured hydraulic conductivity (k_lab), resulting in a correlation factor R²of 0.949. It was finally concluded, for any soil overlying shallow groundwater, that the k value is equal to 1.15f_c.

基于新的水文理论，测量了上覆浅层地下水的非饱和土的导水率（k），具有更高的准确性和更大的便利性。基于Horton 的渗透能力数据扩展和考虑渗透率曲线 (IRC) 的幂律渗透模型，通过超过 24 小时的平均累积水深获得导水率。该理论基本上依赖于达西定律和实验测试的数学推导。现场测试包括双环渗透计测试、地下水深度测量以及在 67 公里²范围内收集 26 个未受干扰的土壤样本。区域。使用全球定位系统 (GPS) 和地理信息系统 (GIS) 选择土壤样本以覆盖美索不达米亚地区的大部分地区，该地区由伊拉克中部哈希米亚的第四纪沉积物组成，而实验室测试包括传统的k测量方法. 进行统计分析以估计分别通过 IRC 和传统测试获得的水力传导率值k _IRC和k _lab之间的收敛性。在统计上，均方根误差 (RMSE) 被认为是确定收敛常数 ( £ )。最精确的k _IRC值作为最终渗透率的乘积（f _c ) 和£  = 1.15，这与 0.104 的RMSE值相关联 。所述ķ _IRC值也比较所获得的ķ_实验室值。得出的结论是，k _IRC值极大地收敛于实验室测量的水力传导率 ( k _lab )，导致相关因子 R ²为 0.949。最后得出结论，对于任何覆盖浅层地下水的土壤，k值等于 1.15 f _c。