SIMULATION OF MOISTURE DISTRIBUTION IN SOIL UNDER DRIP IRRIGATION WITH DIFFERENT DEGREE WATER SALINITY BY USING HYDRUS-2D
DIYALA JOURNAL OF ENGINEERING SCIENCES,
Volume 10, Issue 4, Pages 42-58
AbstractHydrus-2D version 2.04 was used to simulate the movement of moisture content under a surface drip source with eight irrigation treatments included water salinity of (0%, 50%, 66%, 100%) with actual discharges of drips ( 3.94 l/ hr and 7.88 l/ hr) at the root zone of potato crop. It is initially measured in the field as experimental work conducted in Saqlawiyah with longitude E and latitude N, during spring season of 2010. A simulation domain was designed according to spacing between drips with 19 observation points. To monitor moisture content with 24 hours after irrigation at the end of each growing stages of potato crop.
The results showed that, there is a good agreement between measured and simulated moisture content in the root zone at different stages of potato growth and for all irrigation treatments approved in the research. The results also showed there is decrease in moisture content with increasing water salinity and with actual discharge of 7.88 l/hr.
So, Hydrus-2D can be considered as an effective tool for predicting the moisture distribution in the root zone under surface drip irrigation.
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