Environmental isotope is a memory which record the hydrological processes and related environmental changes. Spatial distribution and time changes in environmental isotopes imply the histry of hydrological cycle, e.g., precipitation process, evaporation process, or the condition of such events. So the database of environmental isotopes is very important as a tool to understand local and global hydrological cycle and its changes.

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RELATED PAPERS

Kondoh,A. and Shimada,J.(1997): The Origin of Precipitation in Eastern Asia by Deuterium Excess. Journal of Japan Society of Hydrology & Water Resources, 10, 627-629.