Earth Science Frontiers ›› 2008, Vol. 15 ›› Issue (5): 329-343.
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1School of Water Resources and the Environment, China University of Geosciences(Beijing), Beijing 100083, China
2International Institute for Geoinformation Science and Earth Observation, Enschede 7500AA, Netherlands
3Institute of Symbiotic Science and Technology, Tokyo University of Agriculture & Technology, Tokyo 1838509, Japan