Akademik Veri Yönetim Sistemi
11th Atmospheric Sciences Symposium, İstanbul, Türkiye, 23 - 25 Ekim 2024, ss.33-48, (Tam Metin Bildiri)
To identify the variation of weather conditions on plant evapotranspiration in Kayseri, the seasonal water consumption of the ten most produced crops (barley, safflower, sunflower, winter wheat, pumpkin, tomato, maize, potato, sugar beet, and alfalfa) was computed. Data from 34 years, from 1970 to 2013, with complete weather records, was utilized. Considering growing degree days and base temperatures, each plant's sowing and harvesting times were determined, and then crop evapotranspiration values were estimated using Cropwat 8.0 software. All data were obtained from the Turkish General Directorate of Meteorology. It was determined that crop evapotranspiration varied depending on reference evapotranspiration (ETo), which is influenced by atmospheric evaporative demand, and very strong relationships were found between them. Seasonal crop evapotranspiration ranged from 446 to 554 mm for barley, 582 to 697 mm for safflower, 567 to 683 mm for sunflower, 497 to 666 mm for winter wheat, 483 to 619 mm for pumpkin, 578 to 691 mm for tomato, 541 to 718 mm for maize, 611 to 738 mm for potato, 720 to 884 mm for sugar beet, and 720 to 962 mm for alfalfa. Net irrigation water requirements varied from 144 to 397 mm for barley, 353 to 594 mm for safflowers, 391 to 609 mm for sunflowers, 210 to 501 mm for winter wheat, 350 to 534 mm for pumpkin, 428 to 636 mm for tomato, 441 to 625 mm for silage corn, 428 to 690 mm for potato, 477 to 803 mm for sugar beet, and 513 to 875 mm for alfalfa. Precipitation, which varied considerably, greatly affected the net irrigation water requirement. Reference evapotranspiration was the weather factor that influenced the net irrigation water requirement after rainfall. Therefore, atmospheric variability should absolutely be considered during the design process of irrigation systems. Keywords: Crop Evapotranspiration, Seasonal Weather Conditions, Irrigation Water Requirement