Dr. Georgiadi is one of the organizers and active participants of several international scientific programs in Russia: international field experiments in Central part of Russian Plain (including KUREX-88 and KUREX-91 based on RAS-NASA agreement) and GAME/Siberia program in Eastern Siberia, 1995-2004 (he was member of GAME International Science Panel and co-chair of international Working group on GAME/Siberia), IPY (2007-2008). Since 2005 he is RAS-NEESPI (the Northern Eurasian Earth Science Partnership Initiative) project officer. He is Scientific Board Member of the International Geoscience Programme (IGCP).

Hydrological Consequences of Global Climate Changes: model and field studies for hydrological consequences of global climate changes during past epochs and at global climate warming (NEESPI, IPY, GLOCOPH); Permafrost zone Hydrology: field studies, landscape analysis of hydrological processes (NEESPI, GAME/Siberia Program); Soil Hydrology: meso- and microscale variability of soil moisture and water-physical properties (KUREX-88 and KUREX-91); Peak Snow Flood Discharges: geographical analysis and estimation of peak spring discharges for Russian plain rivers; Hydrology of Forest-steppe and Desert: experimental and model studies of hydrological element heterogeneities within the international field experiments KUREX-1988 and KUREX-1991 (Central part of Russian Plain); USSR-Mongolia biological expedition, 1984-1986 (field studies in Gobi Desert)