Evaluation of Drainmod model in Irrigation and Drainage Network of ABADAN Date palms

In the study, Drainmod model was used to compare measured water table depth fluctuations on the farm with those simulated by the model, also comparison of measured drainage outflow of the farm drains and model simulated was investigated. This study was made in a part of the Irrigation and Drainage Network of ABADAN Date palms. By statistical analysis of the measured and predicted water table depth values, the standard error (S) and the average absolute deviation ( ) were determined 10.09 and 9.02 cm for 2003s and 11.43 and 10.97 cm, for 2004s, 10.89 and 10.3 cm, for 2005s, 11.92 and 11.5 cm for 2006s and 11.16 and 10.92 for 2007s, respectively. These values proved that the meticulous care of Drainmod model in the simulation of the water table depth fluctuations. Also, by statistical analysis of the measured and predicted drainage outflows, the standard error (S) and the average absolute deviation ( ) for 2006s, 3 and 2.8 cm and for 2007s, 2.2 and 2.1 cm were determined respectively. These values proved the accepted care of Drainmod model in the drainage outflow simulation. Concerning to results of this study, the Drainmod model was introduced as a suitable model for the simulation of water table depth fluctuations and drainage outflow, in lands that have drainage systems in Khuzestan Province in Iran.