Interaction matrix for terrestrial pathways of tritium transfer and - PowerPoint PPT Presentation

Jun 30, 2023 •397 likes •477 views

Interaction matrix for terrestrial pathways of tritium transfer and discussion Sverine Le Dizs Environment and Emergency Operations Division Department for the Study of Radionuclide Behavior in Ecosystems Environmental Modelling

Interaction matrix for terrestrial pathways of tritium transfer and discussion… Séverine Le Dizès Environment and Emergency Operations Division Department for the Study of Radionuclide Behavior in Ecosystems Environmental Modelling Laboratory Cadarache, St Paul-lez-Durance, France January 26th, 2010
General interaction matrix ATMO Deposition Deposition Inhalation S YS TEM External RIVER Animal Food & Inhalation S YS TEM watering water External Irrigation collecting MARINE Food Inhalation S YS TEM collecting External Watershed AGRI Migration Food Inhalation erosion (*) S YS TEM collecting External Irrigation VADOZE & Water AQUIFER (*) collecting Animal FOOD Ingestion feeding S YS TEM MAN (Release) (Release) (Release) (Release) (RELEASE SYSTEM)
Tritium interaction matrix for the terrestrial system (1) Atmo- WetDepos. WetDepos FoliarAbsorption NetPrimaryProd. Inhalation DryDepos. DryDepos sphere Irrigation … • Transloc. Pollen & Literfall Ingestion Plant seeds Senescence release & death Root exud. (Organ) Evapo- Water BiolDecay transp. RadDecay OrganicMatter RadDecay BiolGrowth RestOfPlant Evapo- RootUptake Soil ration Excretion? Excretion Animals Death? Death & decomp.
Tritium interaction matrix for the terrestrial system (2) DiffusiveExch WetDepos. Atmo- WetDepos DryDepos Inhalation Deposition DryDepos. sphere Irrigation Root Literfall Ingestion Plant exudation Senescence & death Soil Evapo- RootUptake Water Sorption Degassing Ingestion Migration Fixation ration IsotopicExch RadDecay Desorption OrganicMatter Degassing Ingestion RadDecay Diffusive- RootUptake IsotopicExch Adsorption Air Exch Solubilisation RadDecay Exhalatio Inhalation Excretion Excretion Animals (burrowing n Death & animals) decomposition Evapo- Irrigation Ingestion “RestOfWorld” ration (water bodies, etc.)
Questions/discussion… 1. Should we divide plant into leaf foliar system (NPP, HTO foliar absorption…) and root system (rootuptake) ? 2. Should we consider starch metabolism within plants? 3. Should we consider other compartments in soils (microbiota, inorganic matter,etc.) and associated transfer processes ? 4. Consider following factors that influence transfer processes, such as : Air : PAR, concentration in AIR, temperature Plants : LAI Soils : texture, temperature… 5. Consider HT releases?
Next EMRAS meeting : In Aix-en-Provence (South of France), September 6 th - 9 th

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