Hazard Mapping for Storm Surge and Factorial Analysis of Environmental Variables over Ariake and Yatsusiro -Sea

有明海和八代海风暴潮灾害测绘和环境变量因子分析

• 批准号: 13358005
• 负责人: TAKIKAWA Kiyoshi
• 金额: $ 25.38万
• 依托单位: KUMAMOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13358005/
• 关键词: Environment of Ariake and Yatsushiro Sea; Environment of Estuary; Richness index of Tidal Flat; Effect of Bioturbation on Denitrification rate; Denitrification of Tidal Flat; Environmental Changesi of the Ariake Sea; Environmental Use Value of Ariak

(1)Numerical methods for analyzing the form of tidelands and their gullies were developed. Hazard Mapping for Storm Surge based on Interaction between Storm Surges, High Waves and Tide, and Their Maximum Occurrence Prediction were developed. Quasi-three dimensional ocean circulation model POM (Princeton Ocean Model) was applied to the simulation of current and material transport in the bay, which has complex bottom topography. Numerical scheme for advection computation in POM was changed from the central difference to TVD scheme to improve its transportability. Test simulation made clear the effectiveness of the modified scheme m advection term. Considering the Maximum Occurrence Prediction of Storm Surge, the Countermeasure for decrease the disaster of Storm Surge were performed.(2)Toward the drawing of storm serge hazard map along the Ariake-Shiranui coast, sea surface wind was computed using a meso-scale eteorological model (PSU/NCAR MM5). The simulation was conducted over one year, … More 1999, and the computed wind are compared with observation. The simulation successfully reproduced the near surface wind affected by the surrounding complex topography. It is expected that the accurate storm serge prediction is possible by the use of model simulated wind field. A mathematical model of whitecaps dissipation stress was proposed as an energy transfer interface between atmosphere and coastal ocean. Using tins interface model, numerical Wind-Wave-Current System (WWC System) was established, in which the relation between wind stresses (wind field), whitecap breaker stresses (wave field) and bottom stresses (current field) were integrated. Enhancing effects of whitecap dissipation stress due to wave shoaling was also taken into consideration in the system.(3)In order to clarify the relationship between the morphological changes and the seasonal mean sea level changes, the present study obvious the results of field survey and numerical analysis about bottom profile changes of the intertidal flats. In the field survey, it is found that the average tide level rose about 40 cm from June to October. Also, in order to evaluate the dominating causes of morphological response on the tidal flats, quadratic polynomial approach has been proposed for approximation of cross-shore profiles. A relationship between three parameters of the polynomial and external forces has been examined. Consequently, tidal motions are dominant for tidal flats, which have convex-upwards profiles. A domination of wind waves and river discharges can become important at a time scale that is shorter than the present observation intervals. Tins warrants future observations at before and after both storm and typhoon conditions.(4)The water quality data and the information on microorganisms in Ariake Sea were accumulated, in order to evaluate the eutrophication in Ariake Sea. The chlorophyll-a (Chl-a) concentration in surface seawater at the estuary of Midori River was higher than it offshore. The bacterial number in surface water was higher in summer than in the other season. Additionally, the granular variation of suspended solids in seawater was analyzed, and two dominant peaks were shown in most of samples ; one is at the range of 0.4 to 0.5 μm and the other is around 10μm. The relationship between the Chl-a concentration and the granular variation pattern was not observed, but those between Chl-a concentration and the others were observed in various. Less

(1)建立了分析滩涂及其沟壑形态的数值方法。开发了基于风暴潮、巨浪和潮汐之间相互作用的风暴潮灾害图及其最大发生预测。采用准三维海洋环流模型POM（Princeton Ocean Model）对海湾底部地形复杂的海流和物质输运进行模拟。 POM中平流计算的数值格式由中心差分格式改为TVD格式，以提高其可移植性。试验模拟表明了改进方案在平流项下的有效性。 (2)针对有明不知火海岸风暴潮灾害图的绘制,采用中尺度气象模型(PSU/NCAR MM5)进行海面风计算。模拟进行了一年多，即 1999 年，并将计算出的风与观测结果进行了比较。模拟成功地再现了受周围复杂地形影响的近地表风。预计通过模型模拟风场可以实现准确的风暴潮汐预报。提出了白浪耗散应力的数学模型作为大气与沿海海洋之间的能量传递界面。利用tins界面模型，建立了数值风-波-流系统（WWC系统），其中集成了风应力（风场）、白浪断路器应力（波浪场）和底部应力（流场）之间的关系。系统中还考虑了波浪浅滩对白浪消散应力的增强作用。(3)为了明确潮间带形态变化与季节平均海平面变化之间的关系,本研究采用了潮间带底部剖面变化的现场调查和数值分析结果。现场调查发现，6月至10月平均潮位上涨约40厘米。此外，为了评估滩涂形态响应的主要原因，提出了二次多项式方法来近似跨岸剖面。研究了多项式的三个参数与外力之间的关系。因此，潮汐运动对于具有向上凸轮廓的潮滩来说是主要的。在比目前观测间隔更短的时间尺度上，风浪和河流流量的主导地位可能变得很重要。值得未来在风暴和台风前后的观测。(4)积累有明海的水质数据和微生物信息，以评估有明海的富营养化状况。绿河口表层海水中叶绿素a（Chl-a）浓度高于近海。夏季地表水中细菌数量高于其他季节。另外，对海水中悬浮物的颗粒变化进行了分析，大部分样品都呈现出两个主峰；一种在0.4至0.5μm范围内，另一种在10μm左右。没有观察到叶绿素a浓度与颗粒变化模式之间的关系，但观察到叶绿素a浓度与其他浓度之间的关系。较少的

项目成果

滝川 清, 田淵幹修, 田中健路: "有明海の潮流と物質輸送特性について"海と空. 第78巻2号. 29-32 (2002)

Kiyoshi Takikawa、Mikiobu Tabuchi、Kenji Tanaka：“论有明海的潮汐流和质量输送特征”，《Sea and Sky》第 78 卷，第 2. 29-32 期（2002 年）。

西岡律恵, 滝川 清, 田中健路: "有明海の海域環境変動特性に関する研究"平成14年度土木学会西部支部研究発表会講演概要集 第III部門. III-60 (2003)

西冈立江、泷川清、田中健二：“有明海海洋环境变化特征研究”2002年日本土木工程学会西部分会研究报告摘要，第III-60节（2003年）。

渡辺枢, 滝川清, 青山千春, 田中健路: "σ座標系3次元流動モデルの有明海への適用に関する研究"平成14年度土木学会西部支部研究発表会講演概要集第II部門. II-2 (2003)

Tsutomu Watanabe、Kiyoshi Takikawa、Chiharu Aoyama、Kenji Tanaka：《σ坐标系三维水流模型在有明海的应用研究》2002年日本土木工程学会西部分会研究报告摘要集，第二部分-。 2 (2003)

HARADA hiroyuki (熊本大学), SHIOMICHI Toru (EXCO): "Nitrogen Removal from Effluent of Pig breeding Drainage Treatment Facilities"Proceedings of Strong N and agro 2003. 677-681 (2003)

HARADA hiroyuki（熊本大学）、SHIOMICHI Toru（EXCO）：“养猪排水处理设施废水中的氮去除”Strong N and agro 论文集 2003. 677-681 (2003)

松尾貴史, 滝川 清: "有明海域における2次元及び3次元流動場特性に関する研究"平成13年度土木学会西部支部研究発表会講演概要集 第II部門. II-45 (2002)

Takashi Matsuo，Kiyoshi Takikawa：“有明海域的二维和三维流场特征研究”2001年日本土木工程师学会西部分会研究报告摘要集，第二部分II-45（2002）。