权衡率及其在不同水资源利用模式下的扩展应用

判别水资源开发利用方案是否符合可持续性要求是当今水资源评价的关键环节.将水资源开发利用看成是一个涉及经济、环境、社会效益等多个目标的连续过程,在探讨多目标决策的非劣权衡率和无差权衡率及其相互关系的基础上,根据水资源开发利用历程中决策者偏好结构的不同,将多目标决策权衡率的涵义扩展到与时间相关,揭示了不同水资源利用模式下经济效益目标和环境效益目标之间的权衡率随时间变化的动态演变特性,为水资源可持续利用方案的识别和评价提供了相应依据.实例分析验证了理论的有效性,可供决策层参考.

Trade-off Rate and Its Extended Application to Different Water Resources Utilization Modes

Sustainability judgment of water resources development and utilization is the key step in current water resources evaluation.Water resources development and utilization is treated as a sustainable process involving multi-objectives such as economical,environmental and social efficacy.Based on the discussion about the non-inferior and non-different trade-off rates of multi-objective decision,the basic signification of trade-off rate is extended to time-dependent according to different decision maker's preference structures during different stages of water resources utilization.The dynamic time-varying characteristics of trade-off rate between economical and environmental objectives are revealed under different water resources utilization modes.A feasible and valid approach is proposed for the sustainability identification and appraisal of water resources utilization.Finally,case studies were given to verify the effectiveness of the theoretical framework,and the results can be used as reference for decision-makers.