Environmental Impact due to the Effects of River Inflow Load in the Estuaries of Ariake Sea

有明海河口入水负荷影响的环境影响

• 批准号: 08458164
• 负责人: TAKIKAWA Kiyoshi
• 金额: $ 4.61万
• 依托单位: KUMAMOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 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-08458164/
• 关键词: Environment of Ariake Sea; Environment of Estuary; Effects of River Inflow-Load; Tidal Flat; Denitrification of Tidal Flat; Tidal Current; Air-Born Sea-Salt; Suspended Sediment; 有明海環境; 干潟の浄化; 物質の拡散; 潮流; 千潟環境; 環境評価; 水質浄化能力; 河口域の流況; 低沼の巻き上げ沈

(1)Numerical analysis of tidal flows and ocean waves were performed for all of Ariake-sea and the both estuary of Sirakawa and Midorikawa rivers. Velocity field characteristics and concentration distributions of suspended solids in those areas were evaluated as a function of tidal levels and river inflow rates. Also, numerical methods for analyzing the form of tidelands and their gullies were developed.(2)Long term (1924-1990) variation of the tidal flat topography measured by Kumamoto prefecture was considered. In addition, tidal flow and concentration of suspended solids were measured over the tidal flat, which vertical characteristics were discussed.(3)The Pollutant levels of sediments in the estuaries of Shirakawa and Midorikawa rivers were discussed through the ecological survey results of benthos.(4)The current study presents the results of chemical analyzes of the potential denitrification and nitrification rates, COD,H_2S in samples collect from 30 study plots located in a grid … More (200m*200m) in Ariake-sea. Four sampling points located at different distance and Different depth, near estuary-far estuary, from Midorikawa river, were selected in order to investigation the water quality in Ariake coastal.(5)The in-vitro effect of Nereis Divesicolor has studied in PVC tubes filled with a coastal marine sediment defaunated by sieving. The aim of this experiment was to determine the effect of sediment defaunation of denitrification.(6)Field measurements of the space distribution of air-born sea-salt were carried out at the Yokosima reclamation by the drainage field in Tamana county. Numerical models that take into account fall velocities of sea-salt particles and sea-salt concentration diffusion due to rainfall effects were developed. Distribution characteristics of the air-born sea-salt as effected by meteorological conditions were also investigated. Furthermore, the investigation of the perceptions and awareness about environmental factors to inhabitants living in coastal area were performed by using a questionnaire survey. Less

（1）对整个有明海和白川、绿川两个河口进行了潮流和海浪的数值分析。研究了这些区域悬浮物的流速场特征和浓度分布随潮汐水位和河流入流率的变化。此外，数值方法分析潮滩和冲沟的形式。（2）考虑了熊本县实测潮滩地形的长期（1924-1990）变化。此外，还对潮滩的潮流和悬浮物浓度进行了观测，并对其垂向特征进行了讨论。（3）结合底栖生物生态调查结果，探讨了白川、绿川河口沉积物的污染水平。（4）对30个试验小区的潜在反硝化速率、硝化速率、COD、H_2S进行了化学分析 ...更多信息 (200m* 200米）在有明海。从绿川沿岸选择了近河口-远河口不同距离、不同深度的4个采样点，对有明沿岸的水质进行了调查。（5）在PVC管中，用筛分法去除海洋沉积物，研究了九色沙蚕的离体效应。本试验的目的是确定反硝化作用对底泥生物的影响。（6）通过多名县排水场对横须贺填海区的气载海盐的空间分布进行了实地测量。数值模型，考虑到下降速度的海盐颗粒和海盐浓度扩散，由于降雨的影响。研究了气象条件对气载海盐分布的影响。此外，通过问卷调查的方式，对沿海地区居民对环境因素的感知和认识进行了调查。少

项目成果

大本 照憲: "緑川河口域における流水と干潟の相互作用について" 平成9年度土木学会西部支部研究発表会講演概要集. 81-82 (1998)

Terunori Omoto：“论 Midori 河口流水与潮滩之间的相互作用”日本土木工程师学会 1997 年西部分会研究报告演讲摘要 81-82 (1998)。

大本 照憲: "緑川河口域における流れと干潟の相互作用について" 平成9度土木学会西部支部研究発表会概要集 第II部門. 248-249 (1998)

Terunori Omoto：“论绿川河口水流与潮滩的相互作用”第 9 届日本土木工程师学会西部分会研究报告摘要，第 II 部 248-249（1998 年）。

原田 浩幸: "干潟底泥の脱窒機能評価に関する基礎的実験" 熊本大学バイオサイエンスシンポジウム. 21 (1998)

原田博之：“潮汐平底泥反硝化功能评价的基础实验”，熊本大学生物科学研讨会21（1998）。

K.Takikawa: "Characteristics of Air-Born Sea-Salt in Inland Coastal Area" Proc.of Coastal Engineering, JSCE. Vol.43(2). 1176-1180 (1996)

K.Takikawa：“内陆沿海地区气生海盐的特征”Proc.of Coastal Engineering，JSCE。

滝川 清: "熊本県沿岸域における飛塩量特性" 平成8度土木学会西部支部研究発表会概要集 第II部門. 280-281 (1997)

泷川清：《熊本县沿海地区飞盐量特征》1996年日本土木工程学会西部分会研究报告摘要集第二部280-281（1997）