INTRODUCTIONIn Thailand, the importance of water as a vital resource for all aspects of life has always been respected. His Majesty King Bhumibol Adulyadej, during a speech at Villa Chitralada on March 17, 1986, said: “It is very important for us to have water to drink and use because life is here. If there is water, we can survive. If there is no electricity, we can survive. However, if there is electricity but no water, we tend not to survive. » Thus, water resources management could constitute a fundamental basis for economic development in Thailand. However, water management strategies in Thailand have been oriented towards supply management with emphasis on the construction of irrigation dams and water distribution systems, rather than on the factors of request (Kaosa -ard, M. 2001). Due to the multiple objectives of such a complex issue, water resources management should be implemented to cover entire watersheds, from upstream to downstream, and must involve the active participation of all stakeholders watershed (Office of the Strategic Committee for Water Resources Management, 2012). Multi-criteria decision analysis (MCDA) is a decision-making approach in the assessment process and can be used in combination for water resources management to address multiple objectives in complex situations. This method has been used to analyze multiple variables in complex systems, with the aim of identifying optimal choices to inform the decision-making process. The structure of this conceptual framework for analyzing the characteristics of problems to decide on objectives and criteria is diverse and complex, leading to the adjustment of these problems by evaluation...... middle of article..... . pairwise comparisons (W. Ho 2008; MJ Liberatore and RL Nydick 2008). Usually, the goal is at the top of the hierarchy; the next level contains the criteria and sub-criteria, while the alternatives are at the bottom of the hierarchy. The comparison results are placed in the form of compared matrices. Finally, judgments are created, local priorities of criteria, subcriteria and alternatives are calculated using the principal eigenvector of a comparison matrix, as suggested by Saaty (1980). The synthesis is performed by multiplying the criteria-specific priority vector of the alternatives with the weight of the corresponding criterion, and thus evaluating the results to obtain the priorities of the final composite alternatives with respect to the objective. The highest value of the priority vector indicates the highest ranked alternative. (B. Srdjevic and Z. Srdjevic 2008)