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Abstract                 Volume:9  Issue-9  Year-2021          Original Research Articles

Online ISSN : 2347 - 3215
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcret@gmail.com

Determination of Water Requirements for Onion in Metekel Zone, Benishangul Gumuz Regional State
Demeke Tamene Mitku1*, Asfaw Kebede Kassaand Ashebir Haile Tefera1
1Department of Irrigation and Drainage Engineering, Ethiopian Institute of Agricultural Research, Ethiopia
2Department of Hydraulics and Water Resources Engineering, Haramaya University, Ethiopia
*Corresponding author

The model simulation is a simplification of the field processes. Irrigation scheduling is important for developing best management practices for irrigated areas. In metekel zone understanding how much and when to irrigate their crops is problems of farmers. Therefore, this study was conducted to determine the crop water requirement and irrigation scheduling of onion for the study area to solve the problem. Crop data, soil physical and chemical data, collected long-term daily climatic data and irrigation water quality data, used for crop water requirement and irrigation scheduling using CropWat and AquaCrop models. Reference evapotranspiration was estimated using the FAO Penman Monteith method. The minimum ETc of onion was 401.9mm in Bullen and the maximum Crop water requirement of onion was 495.6 mm in Guba using CropWat Model. But the maximum ETc of onion was 523.7 mm in Pawe and minimum ETc was 355 mm in Wembera using AquaCrop model. The irrigation scheduling with a fixed interval time criterion of 5 days with 20 irrigation events has been determined. Among the performance indicators, NSE values of onion were 0.9,12. 0.88, 0.91, 0.86, 0.85, RMSE values of onion were 8.3, 9.2, 8.17, 8.15, 5.8, and in Pawe, Mandura, Guba, Bullen, Wembera respectively. This indicated that Aqua Crop model used to simulate irrigation scheduling and ETc of onion as CropWat in Metekel zone.

Keywords: CropWat, AquaCrop Crop water requirement, Climate data.
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How to cite this article:

Demeke Tamene Mitku, Asfaw Kebede kassa and Ashebir Haile Tefera. 2021. Determination of Water Requirements for Onion in Metekel Zone, Benishangul Gumuz Regional State.Int.J.Curr.Res.Aca.Rev. 9(9): 37-54
doi: https://doi.org/10.20546/ijcrar.2021.909.005