Behavion and Interaction of Suspended Substance in the thermocline and benthic layr of the lake.

湖泊温跃层和底栖层悬浮物质的行为和相互作用。

• 批准号: 08640546
• 负责人: ENDOH Shuichi
• 金额: $ 1.22万
• 依托单位: Shiga Univ.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640546/
• 关键词: Suspended Substance; Lake Biwa; thermocline; turbidity; river water; plankton; River Yasu; Nepheloid layr; 琵琶湖; 懸濁物; 湖底高濁度層; 湖流; 湖沼; ネフェロイド層

In order to clarify the behavior and circulation of the suspended materials in the bottom layr and the thermocline, the following observations have been carried out.1)Routine Observation : Vertical profiles of water temperature, electric conductivity, turbidity and Chlorophyll a were measured in the south area of the north basin of Lake Biwa once a month. At the same time, the Secci disk depth, pH,and wind were observed. Water sampling were also made to determine the concentrations of SS,the ignition loss and chemical element in SS.2)Continuous recording of current, water temperature and turbidity : Automated current meters and turbidity meters were set to get the continuous records of current and turbidity. Thermometers were set both in the river and the lake to determine the dispersion of the river water into the lake.3)Sediment trap observation : Five sediment traps were set at three points to measure the SS concentration, ignition loss, chemical elements and particle size.On the basis of these observations, we obtained the following results ;1)The river water flows into the surface layr of the lake in spring, but flows into the bottom layr and then intrudes into the thermocline depth in summer and autumn. In winter, the river water flows into the bottom layr and is strongly mixed in vertical by the wind and surface cooling.2)The benthic nepheloid layr is maintained throughout the seasons of thermal stratification. The turbidity in the benthic nepheloid layr is maintained by organic matter such as phytoplankton under decomposition, but is much affected by the inorganic matter from rivers after heavy rainfall.

为了阐明底部层和热级线中悬浮材料的行为和循环，已经进行了以下观察结果。1）常规观察：在水中温度，电导率，浊度和叶绿素a的垂直观察曲线中。比瓦湖北盆地的南部地区每月一次。同时，观察到了secci磁盘深度，pH和风。还进行了水采样以确定SS的浓度，S.2）连续记录电流，水温和浊度的连续记录：自动电流仪表和浊度计，以获取当前和浊度的连续记录。温度计在河流和湖泊中都设置为确定河水进入湖泊的分散。在这些观察的基础上，我们获得了以下结果； 1）河水在春季流入湖面的表面，但在夏季和夏季和秋季流入底部的底部。在冬季，河水流入底部的Layr，并通过风和表面冷却在垂直方向上强烈混合。2）在整个热分层的季节中，底栖肾上腺素层保持保持。底栖肾上非层的浊度由有机物（例如浮游植物分解下）维持，但在大雨后河流的无机物质受到了很大的影响。

项目成果

鷺 邦彦, 遠藤 修一 他4名: "びわ湖における湖底高濁度層の季節変化" 陸水学雑誌. 58-1. 2744 (1997)

Kunihiko Sagi、Shuichi Endo 和其他 4 人：“琵琶湖底部高度浑浊层的季节变化”《湖沼学杂志》58-1（1997）。

K.SAGI,S.ENDOH,M.KAWASHIMA,Y.OKUMURA,T.HATTORI and S.NAKAYAMA: "Seasonal variation of Benthic Nepheloid layr in Lake Biwa" Jpn.J.Limnology. 58-1. 27-44 (1997)

K.SAGI、S.ENDOH、M.KAWASHIMA、Y.OKUMURA​​、T.HATTORI 和 S.NAKAYAMA：“琵琶湖底栖霞石层的季节变化”Jpn.J.Limnology。