SIMULATION OF ADVANCE PHASE IN FURROW IRRIGATION BY "ZIFA" MODEL WITH STANDARD CROSS SECTION

The purpose of this study was to present an economic and accurate model to determine the advance curve for furrow irrigation system. For this purpose, a mathematical model based on analytical solution of zero inertia (ZI) differential equations is developed to simulate advance "ZIFA", in standard furrow cross section. Standard furrow cross section is a discharge-equivalent semicircular shape. The Kostiakov-Lewis formula is used for modeling infiltration phenomenon. Six observed data set and outcome of "numerical ZI of Oweis" and " Schmitz Seus "ZIFA" model are used to verify the presented model. In all comparisons, "standard ZIFA" shows good agreement with observed and calculated data.