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Considering the vital role of water in all periods of human life and the increasing population, water deficit crisis was predictable. This condition lead the water experts to implement the water resource projects to supply suitable water for public population. In this paper, analysis the impact of construction the water resource projects used the Bayesian networks. The Hana dam as a case study has investigated in Iran. In this research by used the questionnaire tools score based on indexes was calculated, then by use the Netica software the total impacts index was calculated. This managerial pattern has been presented based on talents, relative advantages and sensitivity of this study. After the determining the most important parameters of Hana dam construction affect in agricultural sector through literature review and interview, summarized these effects in three groups in social, economic and ecological dimension. Then by use the sensitivity test were prioritized the major factors of the dam construction effects. Effects were classified in three categories of good, average and weak. Also the results of research indicate that the most of effects of this project (Hana dam construction for agricultural sector) was in good class category with 51.6% of total positive effects. The results of the sensitivity analysis showed that the economic nodes have the positive effect but ecological and social nodes have the positive and negative effects in Hana areas. [ABSTRACT FROM AUTHOR]

In the recent years chemical control of weeds has become a dominant method of weed control. The heavy use of these chemicals has had a negative impact on the environment and human health. So this study tries to investigate the analysis paddy farmers' knowledge about integrated weed management (IWM) in Iran. The study was done by a descriptive-surveying method that including field and documentary data. The population of the study consisted of selected Dooreh - CHegeni farmers that cultivation wheat and rice together. Sample population was selected by using the Cochran formula (n=198). The main instrument used in this study was a questionnaire. The validity of research tool was obtained by the idea of experts and for reliability of questionnaires a pilot test was conducted. The Cronbach' Alpha coefficient of higher than 0.7 showed that research tool was reliable (learning style (0.818), economic characteristic (0.700) and social characteristic (0.723) respectively). The result of correlation analysis showed that the variables such as: belief in discussion with other farmers about sustainable weed management, the importance of dialogue and implement the recommendations of experts, quality and quantity of extension programs, attitude towards the impact of SWM (Sustainable Weed Management) on healthy crop production and farmers 'attitude toward the effects of this type of management on increasing production has a significant effect on farmers' awareness of integrated weed management in the field The results also showed that farmers' use of appropriate seed (weed-free) and farmers' appropriate attitude toward discussion with other farmers about integrated weed management in the field is the most important variable could be predicted the rice farmers' knowledge of IWM(Integrated Weed Management) in the field. [ABSTRACT FROM AUTHOR]