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タイトルヨミ
ナカウミ ホンジョウ スイイキ ショウスイロ ノ スイカイ ドウタイ
日本語以外のタイトル
Water-mass Movement in the Channels around Honjo Area of Lake Nakaumi, Southwest Japan
ファイル
言語
日本語
著者
髙安 克已
内容記述(抄録等)
In two artificial channels, North and West Channels around the Honjo area, constructed in relation to the reclamation work of Lake Nakaumi, the water-mass movement was measured during the summer and the autumn of 1997. In the North Channel, the water moves rapidly (sometimes at more than 70cm/sec) with change in the current direction to west and east in a short time (in less than 20 minutes or 1 hour). Apparently tidal waves are not responsible for this short cyclic movement, but provoked by the internal seich with fluctuation of halocline. The large scaled water movements with drastic change in water temperature and salinity are caused by the temporal upheaval of the sea-water level related to such meteorological phenomena as lowering of atmospheric pressure and the Ekman effect caused by continuous strong west-wind along San'in coast. In the south opening of the partition bank between the West Channel and the Honjo area, rapid westward currents of more than 30cm/sec are observed for a short time during the rise of water-level related to tidal change, but usually slow eastward currents of less than 15cm/sec are dominant. Salinity of the water-mass in the channehs affected directly by heavy rainfalls. In the north opening of the bank, the water moves to west and east according to the high and low tide level respectively, but the velocity of both currents are very slow (less than 10cm/sec).
主題
Honjo area of Lake Nakaumi
water-mass movement
tidal wave
interior seich
Ekman effect
掲載誌名
Laguna : 汽水域研究
5
開始ページ
161
終了ページ
173
ISSN
21852995
発行日
1998-03
NCID
AN10439529
出版者
島根大学汽水域研究センター
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
研究・学術情報本部 エスチュアリー研究センター
他の一覧