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The economic impacts of water supply restrictions due to climate and policy change: A transboundary river basin supply-side input-output analysis

机译：因气候和政策变化导致供水限制的经济影响：跨界河流河流域供应侧输入产量分析

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摘要

Finding sustainable pathways to efficiently allocate limited available water resources among increasingly competing water uses has become crucial due to climate-change-induced water shortages and increasing water demand. This has led to an urgent need for the inclusion of economic principles, models, and methods in water resources management. Although several studies have developed macro-economic models to evaluate the economic impacts of alternative water allocation strategies, many if not most ignore the hydrological boundaries of transboundary river basins. Furthermore, of those using input-output (IO) models, only a handful have applied supply-side IO models. In this paper, we present one of the first attempts to develop an inter-regional, supply-side IO modelling framework for a multi-jurisdictional, transboundary river basin to assess the direct and indirect economic impacts of water supply restrictions due to climate and policy change. Applying this framework to the Saskatchewan River Basin in Canada encompassing three provinces, we investigate the economic impacts of two different water supply restriction scenarios on the entire river basin and its sub-basins individually. We find that in the face of climate-change-induced water shortage, economic losses can be reduced by almost 50% by adopting appropriate management practices, including prioritization of water allocation, using alternative water sources, and water re-use technologies.
机译：由于气候变化诱导的水路短缺和增加水需求，寻找可持续途径以有效地分配有限的可用水资源，这一直是至关重要的。这导致迫切需要将经济原则，模型和方法纳入水资源管理。虽然有几项研究已经开发出宏观经济模式，以评估替代水分配策略的经济影响，许多如果不是最忽略跨界河流域的水文边界。此外，使用输入输出（IO）模型的那些，只有少数有应用的供应侧IO模型。在本文中，我们首次尝试开发一个区域间，供应方IO模型框架的多司法管辖区，跨界河流盆地，以评估因气候和政策而产生的供水限制的直接和间接经济影响改变。将这一框架应用于加拿大的萨斯喀彻温河流域，包括三个省份，我们调查了两种不同供水限制情景的经济影响单独对整个河流盆地及其底盆的经济影响。我们发现，在气候变化诱导的水资源短缺中，通过采用适当的管理实践，包括适当的管理实践，包括水分配的优先级，使用替代水源和水再使用技术，可以减少近50％的经济损失。

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