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Please use this identifier to cite or link to this item: http://hdl.handle.net/11266/2461

Title: 湖沼沿岸帯の水の流動に関する研究
Other Titles: Investigations of water movement in coastal zone of the lake
Authors: 新井, 正
ARAI, Tadashi
Issue Date: 20-Mar-1990
Publisher: 立正大学文学部
Abstract: Investigation of water movement in coastal zone of the lake has not been made until the recent years because the apparatus for the precise measurement had not been developed. The recent progress on the electronic devices for the water current investigation such as ultra-sonic current meter or electro-magnetic current meter, has made possible to measure micro-structure of lake current. This article summarizes the results of many investigations made by the new instruments. Investigations on density current near the river mouth were made in Lake Suwa and Lake Kizaki. Trajectory of the under-current was traced by use of electro-magnetic current meter. Ralationship between the density current and the general circulation of the lake has been studied in Lake Kizaki. Distribution of bottom sediment was also analyzed in this lake, by which the lake currents could be explained reasonably. Time variation of coastal current was investigated in Lake Kasumi-gaura. It has been assumed that the variation originated from the large horizontal eddies in the lake. Water movement in the coastal plant zone has been the interest of many ecologist, since the aquatic plants eliminate nutrients in the water and coserve the clear water environment. Detailed observations on current in the reed zone have been made in Lake Biwa. The most important result is that the water in the plant zone moves steadily, although the speed is not high. This movement may act a role for the conservation of water environment of the coastal zone.
URI: http://hdl.handle.net/11266/2461
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