Host: The Association of Japanese Geographers
The iron supplied by Amur River may keep productivity in Akhotsk Sea, however, recent land use/land cover changes (LUCC) in the Amur River Basin raise the concern to the reduction of iron content transported to the sea through the river. LUCC in the Amur River Basin should be monitored, and we have to realize crucial areas to maintain better relationship between human and nature. This paper first shows the basin scale LUCC by satellite imageries, and then try to demonstrate the LUCC among paddy, crop field and wetland in Sanjiang Plain, China, as important area of note. The results are as follows: - LUCCs caused by both human and climate factors are recognized in the Amur River Basin. - The increase in Sigma-NDVI in forested area may caused by climatic factor, probably global warming. - Marked changes by human factor are farmland development in Songnen Plain and Sanjiang Plain. Cutting of trees and forest fire in the forest of Primorsky Krai region in Russia is also the area of human related LUCC. - The area in paddy filed is increasing at Sanjiang Plain in the last decade of 20th century, which may change the iron supply mechanism to the Amur River.
