Document Type : Research Paper
Assistant Professors, Irrigation and Drainage Department., Faculty of Water Science Engineering, Shahid Chamran University of Ahvaz, Iran.
Professors, Irrigation and Drainage Department., Faculty of Water Science Engineering, Shahid Chamran University of Ahvaz, Iran.
In order to design irrigation and drainage networks, it is necessary to determine soil hydraulic conductivity. There are several methods for measurement hydraulic conductivity, which the types of methods are depending on the situation of land. Existing methods are often time-consuming and expensive, so it is recommended the use of simulation models. According to the importance of the determination hydraulic conductivity, in this study using data of Shavoor plain water table depth and discharge were simulated with DRAINMOD model. Then, by simulated values of the discharge and water table depth was estimated the amount of hydraulic conductivity with inverse method. Finally, the results were compared with Ernest method. Results showed that according to the statistical indexes hydraulic conductivity is 2 and 2.5 (m/day) for study area. Comparison between these amount and average of hydraulic conductivity, that were measured with Ernest method (2.3 m/day) represented acceptable estimate of hydraulic conductivity with DRAINMOD model.