- Dr. Kettner's research interest is mainly focused on both local and global fluvial supply dynamics to the coastal zone. With numerical models, he is investigating the impact of long-term climate and sea-level controls on riverine water and sediment fluxes and how these fluxes change over time. On shorter time scales, anthropogenic changes (e.g. altering of land use and placement of reservoirs) also have a significant impact on the water discharge and sediment flux. Dr. Kettner is analyzing and implementing within numerical models as well. More recent research focuses on temporal and spatial variability of within-basin riverine fluxes. Dr. Kettner has become co-director of the Dartmouth Flood Observatory, mapping flooded areas by applying remote sensing data.