River Ecological Restoration and Groundwater Artificial Recharge II.

The article discusses the depletion of rivers and groundwater due to climate change and human activity, which poses a threat to water security and ecosystems. Initiatives such as river ecological restoration and groundwater artificial recharge have been implemented to mitigate this trend. However, these actions can alter the natural connections between river water and groundwater, impacting their hydrological characteristics and material exchange. The article introduces a special issue that aims to further understand these behaviors and mechanisms through fifteen papers covering three research fields: hydrobiogeochemical cycles in riverbank filtration, behavior of pollutants in river-groundwater systems, and the impact of climate change and human activities on groundwater dynamics. These papers provide valuable scientific evidence for the sustainable management of water resources and the protection of water ecological security. [Extracted from the article]