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Landsat/TMによる鹿児島湾央の小河川水の水温拡散 Analysis of River Water Diffusion into the South Basin of Kagoshima Bay Using Landsat/TM Images 田原, 義雄 Tahara, Yoshio 1000060041729 菊川, 浩行 Kikukawa, Hiroyuki 1000040037859 上田, 耕平 Ueda, Kohei 1000000041658 石黒, 悦爾 Ishiguro, Etsuji open access River water diffusion Landsat Satellite image Tidal current Sea surface temperature Wind velocity Kagoshima Bay The diffusion of river water flowing into the south basin of Kagoshima Bay was investigated using Landsat-5 / TM 6-th band images. The numbers of images used were 8 for Kohtsuki R. and Honjyo R. and 9 for Nagata R. and Okawa R. from 1984 to 1994. The main results are as follows : 1) The averaged diffusion area and diffusion distance are almost proportional to the annual flow amount. 2) As the flow amounts of Kohtsuki R. and Nagata R. are small, sea water flows up into the rivers at hightide. At lowtide, river water flows to the southern direction along the coast. The diffusion distances are shorter than 0.8 km at hightide and about 1.6 km at lowtide. 3) The flow distance of Okawa R., which has a relatively large flow amount, is about 2 km, but often runs up to 4 km. 4) The tidal flow effect on the direction of the river water diffusion is large for the long distance and small for the short distance. For the long distance, tidal flow direction within 1 hour affects the diffusion direction. 5) For Honjyo R., the river water diffusion is complex and can not be explained by the tidal flow or wind direction. Constant residual flow and/or the stratification of the sea water must be taken into account. 鹿児島大学 Kagoshima University 1998-12-24 jpn departmental bulletin paper VoR http://hdl.handle.net/10232/692 https://ir.kagoshima-u.ac.jp/records/12205 0453087X AN00040498 鹿児島大学水産学部紀要 Memoirs of Faculty of Fisheries Kagoshima University 47 35 45 https://ir.kagoshima-u.ac.jp/record/12205/files/KJ00004175524.pdf application/pdf 1.4 MB 2016-10-31 1998-12-24