Calibration of Operational Simplified Surface Energy Balance Model SSEBop with the Plant Need factor for Al-Husainiyah project in Wasit Governorate
Abstract
The process of evaporation-transpiration is one of the important processes in agricultural production, because they are related to the vital processes that take place in the plant. The study illustrates the measurement of the actual evapotranspiration coefficient for the HU2 / D3 distributed canal project (an earth canal that takes its water source from the Al-Husainya irrigation canal at 10,300 km and the length of the HU2 / D3 distributed canal is 6,800 km). Which is located in Wassit governorate/Central Iraq, using the operational simplified surface energy balance SSEBop, the study concluded that the SSEBop model is important in obtaining the actual evapotranspiration values in addition to the model's accuracy. The model results were compared with the ministry of agriculture metrological stations data. Agro-meteorology reference ETo coefficient, where the results of the actual evapotranspiration in the lands of the Al-Husainya project - the distributed canal HU2 / D3, the majority of the values refer to the number 62 mm / January of the wheat yield and when compared with the water requirement of the crop, which was calculated based on the value of ETo that obtained from the ministry of agriculture is 59.3 mm / month of January, the resultsare very close, and there are some agricultural lands that may indicate actual evaporation values less than 55 mm and this may be due to the health of the crop in that spots or the delay in the date of plant.
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