عنوان مقاله [English]
Iran's location in the arid and semi-arid belt of the world has doubled the importance of managing the country's water resources. The amount of water that is wasted through evaporation from dams is sometimes more than the amount of water that is used to produce agricultural products.Objectives: Investigating the effect of phoenix in preventing surface evaporation of open reservoirs by considering environmental, operational, technical and economic indicators in laboratory dimensions is one of the objectives of this research.Research method: The research was conducted at the meteorological site of Bo Ali Sina University in Hamedan and repeated the experiment twice in March 2017 and November 2018. In experiment No. 1 and 2, 2 plastic pans with a diameter of 400 mm and a depth of 130 mm and 2 standard evaporation pans (filled with Hamedan city water) were used, one pan as a control and the other pan with a 5/5 diameter ring. 6 cm, covered.The results show a direct relationship between the amount of evaporation and the covered surface, and the magnitude of the average of the control compared to the sample indicates more evaporation in the control. In the Student's t-test, the average of the sample and the control for test number 1 is equal to 0.17 and 0.44 and also for test number 2 is equal to 0.18 and 0.75. The fact that the level of significance is smaller than 0.05 indicates that there is a significant difference between the tested samples from a statistical point of view. The results indicate that the phoenix material is effective in reducing evaporation and this material can be used to manage evaporation in water sources.