Multicriteria Method in Data Envelopment Analysis: an application to measure the performance of the instrument of charging for water in the State of Ceará basins

ABSTRACT The water policies adopt management instruments, among which the charge for water use stands out. Because there are many factors that can be used in an analysis of the efficiency of this management instrument in a watershed, it is necessary to use a scientific methodology for multi-criteria analysis. The aim of this study was to analyze the performance of charging for the use of raw water in the river basins of Ceará State in the main categories of use (industrial, supply and irrigation) using the methodology for data envelopment analysis (DEA) and the BBC model, with the help of computational tool SIAD (Integrated System for Decision Support) to designate the most and the least efficient units in order to improve the management of these resources. In this study, the industry units stood out, shwoing an average efficiency of 57.67%, followed by the public supply with an average efficiency of 22.69% and irrigation with an average efficiency of 11.78%. The charge for the use of water in the Litoral basin, in the industrial sector, stood out as the most efficient unit of the whole study, as the least efficient unit was the basin of the Litoral, in the irrigation sector.

摘要：水资源政策采用各类管理手段，其中水资源使用费制度尤为突出。由于流域内该管理手段的效率分析涉及诸多影响因素，因此需采用多准则分析的科学方法论开展研究。本研究旨在依托数据包络分析（Data Envelopment Analysis，DEA）与BBC模型，借助计算工具SIAD（集成式决策支持系统，Integrated System for Decision Support），对塞阿拉州各流域内工业、公共供水与灌溉三大核心用水类别对应的原水取水收费政策的运行绩效开展分析，以识别效率最优与最差的用水单元，进而优化该类水资源的管理工作。本研究中，工业用水单元表现最优，平均效率达57.67%；其次为公共供水单元，平均效率为22.69%；灌溉用水单元平均效率最低，仅为11.78%。本研究效率最优的用水单元为沿海流域工业用水收费制度，而效率最差的单元则为沿海流域灌溉用水收费制度。