5th UF Water Institute Symposium Abstract

Submitter's Name Kamaljit Banger
Session Name Coastal Water Resources
Author(s) Kamaljit Banger,  University of Illinois (Presenting Author)
  Gurpal Toor,  University of Florida
  Interaction between land-use and climatic extremes in controlling nitrogen transport from watersheds
  The transport of nitrogen (N) from land surface to waterbodies is controlled by complex interactions among land-use, climate, and soils. Various forms of N (such as organic vs inorganic) vary significantly in the loss pathways, which adds another complexity to predict the impact of climatic extremes on N transport from watersheds. In most coastal water bodies such as the Tampa Bay Estuary, N is the limiting nutrient that drives eutrophication. The key questions on how climate-driven extremes and land-use interactions control N transport in the Tampa Bay are yet unclear. We hypothesize that land-use in the watersheds can modify the effects of the climate-driven extremes (such as high vs low precipitation) in controlling N transport. Here, we present the on how climatic extremes have affected N transport across urban land-use gradient in watershed draining into the Tampa Bay Estuary, Florida. This presentation will include three aspects: 1) how total N transport varied in the wet and dry years in the watersheds, and 2) how land use and climatic-driven extremes control organic, inorganic, and total N transport? Finally, we will discuss uncertainties in the research framework (spatial scale of watershed and temporal resolution of N monitoring) used for studying climatic extremes effects on N loss. This research will provide directions to develop research framework on studying such complex phenomenon and will enhance our understanding on interactions between human activities, climatic extremes, and ecosystem services.