ASSESSMENT OF SURFACE AND SUBSURFACE DRIP IRRIGATION SYSTEMS WITH DIFFERENT SLOPES BY HYDROCALC MODEL

Abstract

The HydroCalc simulation model is considered one of the designs, planning and evaluating
the hydraulic parameters of irrigation systems, and using this model added more advantages to the
measurements of hydraulic evaluations of irrigation system. Field trials were conducted in the research farm
and production center of the National Research Centre at El-Nubaria, El-Behaira Governorate, Egypt. In the
field of irrigation system management, in the drip irrigation, automatic system, the use of sensors installed in
the soil determines the water needs. So as to adjust the water added amounts depending on the timetable for
the process of irrigation field, which varies from one crop to another. The results could be summarized as
follows: using a lateral line length of 60 meters, the friction loss values expected and calculated which were
estimated under drip surface and subsurface irrigation systems; subsurface was greater than the surface drip
irrigation. The correlation coefficient between the values of the compressor losses due to friction were greater
than 0.9. This shows a strong correlation between the predicted values, which were estimated. Significant
differences were found between the treatments and the interactions between irrigation systems. The
HydroCalc simulation model is recommended for evaluating the subsurface irrigation systems.