Tekirdağ koşullarında toprak nem profilinin SWAP modeli ile tahmin edilmesi
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Dosyalar
Tarih
2009
Yazarlar
Dergi Başlığı
Dergi ISSN
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Yayıncı
Namık Kemal Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bu çalısma Tekirdag kosullarında asma ve ayçiçegi bitkilerinin sulanan ve kuru kosullarda SWAP modeli ile toprak nem profilinin tahmin edilmesi amacıyla gerçeklestirilmistir. Bu amaçla ayçiçegi ve asma bitkisi ile yapılan tarla çalısmaları ile elde edilen veriler SWAP modeli ile hesaplanan model ile karsılastırılmıstır. Modelde girdi olarak bitki yetistirme sezonundaki iklim parametreleri ve toprak-su iliskilerini ifade eden katsayılar (su içeriginin bir fonksiyonu olarak matrik potansiyel ve hidrolik iletkenlik, topragın nem sabiteleri) kullanılmıstır. Çıktı olarak ise toprak profilinin her 10 cm derinligi için üçer günlük ara ile nem degerleri simüle edilmistir. Nem degerlerine baglı olarak bitki su tüketimi hesaplanmıstır. Hesaplanan degerler ile simüle edilen degerler karsılastırıldıgında kabul edilebilecek bir düzeyde iliski bulunmustur. Her iki bitki için de kuru kosullardaki uyum daha iyi bulunmustur. Sulu kosullardaki uyumun nispeten zayıf olmasının nedeni tarla çalısmalarında nem takibinin onar günlük ara ile yapılmıs olmasında kaynaklanmıstır. Modelin kullanılabilecegine dair veriler tesbit edilmesine karsılık, özellikle modeli test etmek amacıyla düzenlenen tarla çalısmalarıyla birlikte degerlendirilmesi gerektigi sonucuna varılmıstır.
This study was conducted to predict soil moisture profile of sunflower and viticulture under Tekirdag conditions for rainted and irrigated conditions using SWAP model. With this aim, results from the field studies of sunflower and viticulture were compared with the simulated ones. The climatic data during the growth season and soilwater related parameters (matric potential and hydraulic conductivity as a function of soil moisture and soil water constants) were the model input. Soil moisture data for 10 cm intervals along the profile every 3 days were the model output. The water consumption was calculated from the soil moisture profile. In general, model simulation data were reasonable agreed with the measured data while there was better agreement under rained condition for both crops. The poor agreement under irrigated conditions was attributed limited number of soil moisture measurements (ten-day intervals) in the field studies. While the model promises, field studies specifically conducted to test the model are suggested.
This study was conducted to predict soil moisture profile of sunflower and viticulture under Tekirdag conditions for rainted and irrigated conditions using SWAP model. With this aim, results from the field studies of sunflower and viticulture were compared with the simulated ones. The climatic data during the growth season and soilwater related parameters (matric potential and hydraulic conductivity as a function of soil moisture and soil water constants) were the model input. Soil moisture data for 10 cm intervals along the profile every 3 days were the model output. The water consumption was calculated from the soil moisture profile. In general, model simulation data were reasonable agreed with the measured data while there was better agreement under rained condition for both crops. The poor agreement under irrigated conditions was attributed limited number of soil moisture measurements (ten-day intervals) in the field studies. While the model promises, field studies specifically conducted to test the model are suggested.
Açıklama
Anahtar Kelimeler
SWAP Modeli, toprak nem degeri, sulama programı, su tüketimi, ayçiçegi (helianthus annuus), asma(vitis vinifera), SWAP model, soil moisture profile, sunflower (helianthus annuus), viticulture(vitis vinifera), evapotranspiration, irrigation scheduling
