Magyar Tudományos Akadémia
Atommagkutató Intézet

Surface water-­groundwater interactions and their effect on biogeochemistry

Szeminárium Surface water-­groundwater interactions and their effect on biogeochemistry
Előadó

Dr. Henrietta Dulai

Department of Geology and Geophysics, University of Hawaii, Manoa
Associate Professor
Kapcsolattartó Dr. Fülöp Zsolt
Időpont 2017-12-07 11:00
Helyszín MTA Atomki, nagyelőadó (Debrecen, Bem tér 18/c, XII. épület 3. emelet)
Esemény leírása

Surface water-groundwater interactions are a well-recognized part of the global water cycle. These processes occur along coastal margins, streams, lakes and are responsible for water as well as geochemical exchange. Groundwater discharge to surface water bodies has been recognized as an important pathway for nutrients, greenhouse gases, trace metals, and other contaminants of emerging concern. Clear linkages have been documented between land use, especially anthropogenic perturbation, and groundwater-derived solute fluxes to streams, ponds and the coastal ocean. There is increasing interest in this process and its effects on ecosystems, ocean chemical budgets, and water quality. Coastal groundwater discharge, for example is responsible for delivering twice as much water to the oceans as rivers and correspondingly more nutrients and other chemical compounds. Yet, groundwater fluxes are highly variable in space and time, and are hard to locate and quantify. We use natural radionuclides and stable isotopes as tracers to study the spatial and temporal variability of groundwater discharge and its components. Technical advances allow us to map larger regions and look at high-resolution temporal changes in discharge. An overview of the processes at play and specific examples from coastal and stream studies will be presented.