The modeling results show that the HYDRUS-2D\3D program can be used to research and design different applications of the drip irrigation system.Ĭrop irrigation with subsurface drip (SDI) is increasing in the semiarid Texas High Plains (THP). As a result of the study, it was determined that there was a harmony between the soil water content distribution data modeled using the HYDRUS-2D\3D program and the actual data measured in the field. In the study the moisture distribution in the soil profile was determined by gravimetric method before, during, at the end of irrigation and 24, 48, 72 hours after irrigation. This study was carried out to determine the moisture movement in the soil profile with the HYDRUS-2D\3D program using 2 different dripper flow rates (2 and 4 L s-1) in drip irrigation method. In recent years, it is easy to model the moisture change in the soil profile with computer models. In field conditions, determining the water movement or soil moisture along the desired soil profile is quite laborious and time consuming. In order to determine the optimum irrigation water, it is necessary to know the moisture values along the soil profile. One of the basic requirements in the design of the drip irrigation system is to obtain more information about the shape and size of the wetted soil zone.
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