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首页> 外文期刊>Water News A propos de l'eau >Climate change effects on the thermal stratification of Lake Diefenbaker, a large multi-purpose reservoir
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Climate change effects on the thermal stratification of Lake Diefenbaker, a large multi-purpose reservoir

机译：气候变化对Diefenbaker Lake Dief Baker的热分层，大型多功能储层

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摘要

Large multi-purpose reservoirs serve not only to generate hydropower but to supply water for agricultural irrigation, animal and human consumption and to provide flood control. One of the key factors affecting physical functioning and deteriorating aquatic ecosystems in reservoirs is climate change. For instance, increases in water temperature accelerate chemical reaction rates, decomposition rates and oxygen demand at the water-sediment interface. Earlier thermal stratification onset, and longer and more intense reservoir thermal stratification are all consequences of global warming. Such disruptions in thermal stratification have been associated with reductions in hypolimnion dissolved oxygen, increasing anoxia events and enhancing reservoir eutrophication. In this research paper, we implement the 2 D hydrodynamics and water quality model, CE-QUAL-W2, to investigate the effects of climate change and streamflow scenarios on the thermal structure of Lake Diefenbaker, a large, multipurpose reservoir, located in Saskatchewan, Canada. Model results indicate that meteorological variability will dictate a nonlinear increase in reservoir water temperature in the coming decades, where larger increases in water temperature will occur during summer and fall in the upper layers. Also, decreases in reservoir streamflows will reduce water temperature at intermediate layers during summer and fall. Our model can be used as a tool to mitigate and manage the effects of climate change on the reservoir water quality.
机译：大型多用途水库不仅可以产生水电，而是为农业灌溉，动物和人类消费提供水，并提供防洪。影响水库中水生生态系统的身体功能和恶化的关键因素之一是气候变化。例如，水温升高加快化学反应速率，分解速率，并在水 - 沉积物界面需氧量。早期的热分层发作，较长，更强烈的水库热分层都是全球变暖的所有后果。热分层的这种破坏已经与低聚溶解的氧，增加缺氧事件和增强储层富营养化的中断相关。在本研究报告中，我们实施了2个d流体力学和水质模型，CE-QUAL-W2，来调查迪芬贝克湖，大，综合利用水库，位于萨斯喀彻温省的散热结构气候变化和水流情况下的效果，加拿大。模型结果表明，气象变异性将在未来几十年中决定储层水温的非线性增加，其中在夏季将在夏季发生较大的水温增加，并落入上层。而且，储层流出的减少将在夏季和秋季降低中间层的水温。我们的型号可用作减轻和管理气候变化对水库水质的影响的工具。

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