Estimating Water Requirement and Scheduling Irrigation for Tomato Crops In Dhi Qar Governorate By Using The CropWat Program
DOI:
https://doi.org/10.51699/ijbea.v3i4.179Keywords:
Irrigation scheduling, Water requirements, Evapotranspiration, Field capacity, Water stressAbstract
This study addresses the increasing need to predict crop productivity responses to irrigation levels, crucial for optimizing water use under limited availability and enhancing agricultural returns. Focusing on tomato crops in Nasiriyah, the research evaluates the CropWat program's effectiveness in determining irrigation scheduling, water requirements, and evapotranspiration rates. Using climate, crop, and soil data, the program calculated irrigation schedules based on a 70% soil moisture depletion threshold. Results indicated that the tomato crop required nine irrigations, from September 18 to February 6, with a field irrigation efficiency of 70%. Water requirements peaked at 44.7 mm every ten days at the start of the growing season, decreasing to 10.1 mm by early February. Total irrigation values increased significantly, from 28.2 mm to 117.5 mm by the season's end. These findings highlight the utility of the CropWat program in improving irrigation management, essential for sustaining tomato production and maximizing economic returns in water-scarce conditions.
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