Numerical simulation on the behavior of discharge from Chikugo River in Ariake Sea by using a 3-D flow model with wind shear stress acting on the water surface

利用作用于水面的风切应力的 3D 流动模型对有明海筑后川流量行为进行数值模拟

• 批准号: 23656307
• 负责人: MATSUNAGA Nobuhiro
• 金额: $ 2.41万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23656307/
• 关键词: 環境水理学; 沿岸海域環境学; 流動シミュレーション; 閉鎖性内湾; 塩淡清掃; 風応力; 吹送流; 3次元流動シミュレーショう; 大気流動シミュレーション; 大気海洋相互作用; 有明海環境異変; 諫早湾干拓事業

The project leader found that the salinity stratification is formed over the whole region of Isahaya Bay in the rainy season and that the salinity in the deep region of Isahaya Bay decreases to about half value of ordinary sea water in some cases and it recovers in some cases. This project was made under the hypothesis that the salinity stratification might be due to the discharge from the rivers running into Ariake Sea and its appearance and disappearance might be generated by local wind in Isahaya Bay. The obtained results are as follows: 1)The salinity stratification over the whole region of Isahaya Bay is mainly due to the discharge from Chikugo River. 2)The north-northeasterly wind transports the water mass of low density near the water surface from Ariake Sea to Isahaya Bay.3)The south-southwesterly wind tends to suppress the inflow of the water mass of low density from Ariake Sea to Isahaya Bay and to promote conversely its outflow from Isahaya Bay toAriake Sea.

项目负责人发现，在雨季，谏早湾整个区域都会形成盐度分层，谏早湾深部区域的盐度有时会降至普通海水的一半左右，有时又会恢复。 。该项目的假设是，盐度分层可能是由于流入有明海的河流的排放造成的，其出现和消失可能是由谏早湾的当地风引起的。所得结果如下： 1）谏早湾整个区域的盐度分层主要是由筑后川的泄水造成的。 2)北偏北风将近水面低密度水团从有明海输送至谏早湾。3)南偏西南风倾向于抑制有明海低密度水团流入谏早湾反过来又促进其从谏早湾流向有明海。

项目成果

諫早湾における大規模塩淡成層の消失プロセス

谏早湾大规模盐灰层结的消失过程

• 发表时间: 2013
• 作者: 李洪源; 李騫; 馬場歩; 松永信博; 千葉賢
• 通讯作者: 千葉賢

諫早湾内の塩淡成層構造に及ぼす南北排水門からの排水の影響評価

南北排水闸门排水对谏早湾盐鲜层状结构的影响评价

• 发表时间: 2012
• 作者: 李洪源;李騫;松永信博;千葉賢
• 通讯作者: 千葉賢

諫早湾における赤潮の経年変化

谏早湾赤潮的长期变化

• 发表时间: 2013
• 作者: 財前亜美

諫早湾における低酸素水塊の発達

谏早湾缺氧水团的发育

• 发表时间: 2012
• 作者: 宮原淳也(松永信博)

Characteristics of Hypoxic Water Mass in Isahaya Bay

谏早湾低氧水团特征

• 发表时间: 2014
• 作者: A. Zaizen; H. Li; Y. Sugihara;N. Matsunaga
• 通讯作者: N. Matsunaga