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Title: Applicability of CDE Equation for Simulation of Escherichia Coli Bacterial Leaching from a Silty Clay Soil
Authors: Maryam Maneshdavi; Alireza Jafarnejadi; Hossein Shirani; Gholamabbas Sayyad
Aff: Department of Soil Science, Science and Research Branch, Islamic Azad University, Khouzestan, Iran.
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Keywords: Escherichia Coli Bacteria; Simulation; HYDRUS-1D Model.
Abstract:In this study, the equilibrium equation was used to predict the transfer and absorption of bacteria in the column of soil in during leaching time. The coefficient determination for direct modeling through the equilibrium equation was recognized 0.58 respectively. But, in the inverse modeling, bacterial movement in soil was predicted by using equilibrium equation had higher coefficient to amount 0.91 respectively. These results show the high efficiency of model through using the equilibrium equation (CDE) in the inverse method than its direct method in simulating the bacterial movement in the soil treated. The evaluation of model sensitivity was carried out by changing the soil hydraulic parameters in a specific range, it was revealed that the model has been sensitive to some changes of the soil hydraulic parameters and also it undergoes drastic changes when the parameters of the curve simulated by the model change. Finally, the validation of the inverse method using the equilibrium equation was 0.98. Both show the accuracy and correctness of the model