Groundwater-surface water interactions include the exchange of fluids and solutes between groundwater and surface water, which can affect water quality and water supply. Investigating the interaction of groundwater and surface water is essential to water managers and hydrologists for the improvement of effective waterresource policy, water resource protection and management. The effects of groundwater-surface-water exchange can occur on a variety of spatial and temporal scales. Hence, useful predictions based on point measurements are difficult because the characteristics of groundwater-surface water exchange can vary over time and across a site or region. | Groundwater- surface water interaction its importance in-situ monitoring and monitoring challenges - An overview