University of Tehran Desert 2008-0875 14 2 2009 12 01 Evaluation of the Efficiency of CROPWAT Model for Determining Plant Water Requirement in Arid Regions 209 215 36341 10.22059/jdesert.2009.36341 EN A. Malekian Assistant Professor, University of Tehran, Tehran, Iran H. Ghasemi MSc. Graduate of Combating Desertification, Zabol University, Zabol, Iran A. Ahmadian Ph.D. Student , Zabol University, Zabol, Iran Journal Article 2009 03 15 Shortage of water resources and increasing demand to consumption of this scarce resource, leads to some<br />noticeable limitations. On the other hand, population growth and consequently, increasing demand for water in arid<br />and semi arid regions , needs production in exchange of little amount of water consumption. To approach this<br />objective, an experiment in the complete randomized blocks carried out in four replications for cumin plant growing<br />in Zabol, southeastern Iran. Experimental treatments included irrigation periods at three levels. Then using<br />CROPWAT model, the water requirement of the plant is met. Analyzing the data resulted from production gathered<br />in different times of irrigation and consumption of water in the three times irrigation case with sound efficiency (1750<br />m3/ha), is more little than the water amount which is simulated by the CROPWAT model in 2003 (6070 m3/ha) and<br />(5363 m3/ha) in 2004. It then showed that this model is not effective in determining the water requirement of cumin at<br />this region. https://jdesert.ut.ac.ir/article_36341_b5506d9c85fe0387ce84d4132b117cfa.pdf