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

9908145利特尔这一年奖的美国-瑞士环境技术研究项目支持John C.利特尔和弗吉尼亚理工学院和州立大学的研究生，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。 该项目涉及气泡羽流扩散器对供水水库的影响。 气泡羽流扩散器用于补充分层储层的下层水中的氧气。 需要这些装置来保护冷水渔业，改善供水水库的原水质量，并减轻水力发电的环境后果。 有证据表明，气泡羽流扩散器可对储层内的环境条件产生重大影响（促进混合和增加沉积物需氧量），而储层内的条件又可对气泡羽流的性能产生严重影响。 研究人员建议开发一个综合模型，其中气泡羽流扩散器和水库的行为耦合。 这项合作利用了美国研究人员在跨介质传质方面的互补专业知识和瑞士研究人员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.