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The feasibility of inter-basin water transfers to manage climate risk in England
Climate Risk Management ( IF 4.4 ) Pub Date : 2021-05-14 , DOI: 10.1016/j.crm.2021.100322
Majed Khadem , Richard J. Dawson , Claire L. Walsh

Climate change, population growth, and environmental pressures, pose challenges for water resource management. Many countries, like the UK, are projected to experience regional variation in the risk of droughts. One solution is to use inter-basin transfer (IBT) schemes to move water from where it is abundant to where it is scarce. But what are the first steps in studying the feasibility of such schemes as a solution? How can we ensure an IBT brings more resilient water future under the rapidly changing climate and not have a detrimental impact elsewhere? This paper develops and demonstrates a framework for a preliminary climate impacts assessment for IBT schemes. The framework evaluates negative hydrological and ecological impacts of IBTs to the exporting basin. A hypothetical IBT scheme, delivering water from the northeast of England to London in the southeast, is tested. Three transfer scenarios are analysed under 100 future climate scenarios generated from the driest member of UK Climate Projection 2018 (UKCP18). The framework shows there would be no ecological harm for the exporting basin under any scenario. However, the hydrological risk is sensitive to the IBT operation. Constant and low flow operation of the IBT would lead to supply deficits of up to 60% in the exporting basin by the 2080 s. Transferring larger volumes, but only in winter months, allows the IBT to meet the projected water resource deficit in London whilst not increasing hydrological risks in the northeast – even under the driest UKCP18 climate scenario.



中文翻译:

流域间调水管理英格兰气候风险的可行性

气候变化,人口增长和环境压力给水资源管理带来了挑战。预计许多国家(如英国)在干旱风险方面会出现地区差异。一种解决方案是使用流域间转移(IBT)方案将水从丰富的地方转移到稀缺的地方。但是,研究此类方案作为解决方案的可行性的第一步是什么?我们如何确保IBT在快速变化的气候下为未来的水带来更大的适应力,并且不会在其他地方产生不利影响?本文开发并演示了IBT计划的初步气候影响评估框架。该框架评估了IBT对出口盆地的负面水文和生态影响。假设的IBT方案,已经测试了从英格兰东北部向东南部伦敦的供水。在英国气候预测2018(UKCP18)最干旱的成员产生的100种未来气候情景下,分析了三种转移情景。该框架表明,在任何情况下都不会对流域造成生态危害。但是,水文风险对IBT操作很敏感。到2080年代,IBT的恒定和低流量运行将导致出口盆地的供应赤字高达60%。即使在UKCP18气候最干燥的情况下,转移较大的水量(但仅在冬季)才能使IBT满足伦敦预计的水资源短缺,而不会增加东北部的水文风险。在英国气候预测2018(UKCP18)最干旱的成员产生的100种未来气候情景下,分析了三种转移情景。该框架表明,在任何情况下都不会对流域造成生态危害。但是,水文风险对IBT操作很敏感。到2080年代,IBT的恒定和低流量运行将导致出口盆地的供应赤字高达60%。即使在UKCP18气候最干燥的情况下,转移较大的水量(但仅在冬季)才能使IBT满足伦敦预计的水资源短缺,而不会增加东北部的水文风险。在英国气候预测2018(UKCP18)最干旱的成员产生的100种未来气候情景下,分析了三种转移情景。该框架表明,在任何情况下都不会对流域造成生态危害。但是,水文风险对IBT操作很敏感。到2080年代,IBT的恒定和低流量运行将导致出口盆地的供应赤字高达60%。即使在UKCP18气候最干燥的情况下,转移较大的水量(但仅在冬季)才能使IBT满足伦敦预计的水资源短缺,而不会增加东北部的水文风险。水文风险对IBT操作很敏感。到2080年代,IBT的恒定和低流量运行将导致出口盆地的供应赤字高达60%。即使在UKCP18气候最干燥的情况下,转移较大的水量(但仅在冬季)才能使IBT满足伦敦预计的水资源短缺,而不会增加东北部的水文风险。水文风险对IBT操作很敏感。到2080年代,IBT的恒定和低流量运行将导致出口盆地的供应赤字高达60%。即使在UKCP18气候最干燥的情况下,转移较大的水量(但仅在冬季)才能使IBT满足伦敦预计的水资源短缺,而不会增加东北部的水文风险。

更新日期:2021-05-25
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