U.S.-Swiss Collaborative Research: Hypolimnetic Oxygenation of Stratified Reservoirs

99081451利特尔这项为期一年的美国-瑞士环境技术研究项目支持约翰·c·利特尔博士和弗吉尼亚理工学院和州立大学的一名研究生与瑞士苏黎世联邦理工学院环境物理项目负责人阿尔弗雷德·j·韦斯特博士合作。该项目解决了气泡-羽流扩散器对供水水库的影响。利用气泡-羽流扩散器补充层状储层低氧离子中的氧气。需要这些装置来保护冷水渔业，改善供水水库的原水质量，并减轻水力发电对环境的影响。有证据表明，气泡-羽流扩散器可以对储层内的环境条件产生重大影响（促进混合和提高沉积物的需氧量），而储层内的条件反过来又会对气泡-羽流的性能产生严重影响。研究人员建议建立一个综合模型，其中气泡-羽流扩散器和储层的行为是耦合的。此次合作充分利用了美国研究者在跨媒介质量传递和瑞士研究者在气泡-羽流建模和曝气技术方面的互补专业知识。

9908145LittleThis one-year award for an U.S.-Swiss research project in environmental technology supports Dr. John C. Little and a graduate student from Virginia Polytechnic Institute and State University for collaboration with Dr. Alfred J. Wuest, head of the Environmental Physic Program at the Federal Institute for Technology in Zurich, Switzerland. The project addresses the impact of bubble-plume diffusers on a water-supply reservoir. Bubble-plume diffusers are used to replenish oxygen in the hypolimnion of stratified reservoirs. These devices are required to preserve cold-water fisheries, improve raw water quality in water-supply reservoirs, and mitigate environmental consequences of hydropower generation. Evidence indicates that bubble-plume diffusers can have a significant impact on ambient conditions within a reservoir (promoting mixing and enhancing sediment oxygen demand), and that conditions within a reservoir can in turn have a severe impact on the performance of a bubble-plume. The investigators propose to develop an integrated model in which the behavior of both bubble-plume diffusers and the reservoir are coupled. This collaboration takes advantage of the complementary expertise of the U.S. investigator in cross-media mass transfer and the Swiss investigator's in bubble-plume modeling and aeration technology.