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Index-Based Cost-Effectiveness Analysis vs. Least-Cost River Basin Optimization Model: Comparison in the Selection of a Programme of Measures at the River Basin Scale

机译：基于指数的成本效益分析与成本最小的流域优化模型：流域规模的措施选择的比较

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摘要

Increasing water scarcity challenges conventional approaches to managing water resources. More holistic tools and methods are required to support the integrated planning and management of fresh water resources at the river basin level. This paper compares an index-based cost-effectiveness analysis (IBCEA) with a least-cost river basin optimization model (LCRBOM). Both methods are applied to a real case study to design a cost-effective portfolio of water demand and supply management measures that ensures compliance with water supply and environmental targets. The IBCEA is a common approach to select programmes of measures in the implementation of the EU Water Framework Directive. We describe its limitations in finding a least-cost solution at the river basin level and highlight the benefits from implementing a LCRBOM. Both methods are compared in a real case study, the Orb river basin, in the south of France. The performances of the programmes of measures selected by the two methods are compared for the same annual equivalent cost. By ignoring the spatial and temporal variability of water availability and water demands in the river basin and the interconnection among its elements, the aggregated approach used in the standard IBCEA can miss more cost-effective solutions at the river basin scale.
机译：水资源匮乏的加剧对传统的水资源管理方法提出了挑战。需要更多的整体工具和方法来支持流域一级淡水资源的综合规划和管理。本文将基于索引的成本效益分析（IBCEA）与成本最低的流域优化模型（LCRBOM）进行了比较。两种方法均用于实际案例研究，以设计经济高效的水需求和供应管理组合，以确保符合水供应和环境目标。 IBCEA是选择实施欧盟水框架指令的措施计划的常用方法。我们描述了在流域一级寻找成本最低的解决方案时的局限性，并强调了实施LCRBOM的好处。在法国南部的Orb河盆地的真实案例研究中比较了这两种方法。比较两种方法选择的措施计划的绩效，以相同的年均等价成本进行比较。通过忽略流域水资源和水需求的时空变化及其要素之间的相互联系，标准IBBCA中使用的汇总方法可能会错过流域规模上更具成本效益的解决方案。

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