This Special Issue of Water will present and review the latest insights, innovations, and experiences in river training, focusing on four specific areas. The first area regards the functioning of innovative river training structures, such as permeable groynes, bottom vanes, surface screens, porcupines, and longitudinal training dams. The second area relates to the adverse effects of river training, often only becoming manifest and creating full awareness of their existence in the long term. This awareness of adverse effects is now leading to more adaptive approaches to stabilizing river courses, protecting riverbanks, improving navigability, and providing safety against flooding. The third focus area concerns the advanced theory and modeling of hydrodynamics and morphodynamics to predict effectiveness and to assess the impacts of river training. The fourth area is about case studies to evaluate the long-term performance and sustainability of river training projects implemented in the past. The Guest Editor welcomes papers on river training that address one or more of these focus areas. The ultimate goal is to produce a high-quality state-of-the-art for river scientists, as well as guidance for practicing river engineers.@en