Abstract
The volume balance and hydrodynamic models were used to simulate the advance phase of irrigation in level basins, To evaluate the accuracy of the models, the simulated advance time and water application efficiency were compared with the field data. The volume balance and hydrodynamic models underestimated the total advance time by 16 min (10%) and 8 min (5%), respectively. For complete irrigation. both models resulted in water application efficiency of 72.9%. Because the downstream end of the basin was under-irrigated, water application efficiency (80.6%) was higher in the field. Under the conditions examined, both the models were comparable in predicting advance time and application efficiency with an acceptable degree of accuracy,
