Understanding the transport and horizontal water exchanges occurring in water bodies is essential to predict biogeochemical changes in aquatic ecosystems. Most of our knowledge of water exchanges comes from lakes with simple bathymetries. However, many lakes worldwide have complicated morphometry, such as multi-basin lakes. Previous work on multi-basin lakes focused on processes such as baroclinic oscillations (wind-driven oscillations of the thermocline) or Ekman transport (interaction of wind, Coriolis, and drag forces) in large lakes.