Development of nutrient circulation model for ecological system control in estuary

河口生态系统控制养分循环模型的建立

• 批准号: 14205069
• 负责人: SAWAMOTO Masaki
• 金额: $ 17.72万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14205069/
• 关键词: Rivermouth; Ecology; Substance transport; Nutrient salt; Circulation model; Tideland; 河口域; 生態系; フミン物質; SS; 蒸発散; ベントス; 河口生態系; 干潟栄養塩; 非点源流出; 淡塩水; 閉鎖性内湾

Title Development of nutrient circulation model for ecological system control in estuaryIn order to develop nutrient circulation model in estuary, the behavior of nutrient is investigated in river basin, river beds, rivermouth and estuary. The main results are as follows1.The mechanism of nutrient origin in river basin was surveied and a numerical model was developed in the Natori River basin, The difference between ordinal flow condition and floods was clearly observed. The nutrient load was evaluated in various mode of transport.2.The feature of nutrient transport in river was measured and modeled. Nutrient exchange between flow and river bed was anlysed and inportance of river bed was confirmed in circulation process.3.Behavior of saline wedge was observed at the Abukuma rivermouth. The mixing processes of water and nutrient were analyzed. The spread of nutrient in the sea was also studied.4.The equilibrium model for humic-iron complex in estuarine condition was developed on the basis of Dubye-Huckel theory taking account of the electrostatic interaction between iron and humic substance. The dissociation of humic-iron complex with increasing tonic strengh in estuaries was well explained by the developed model.5.Behavior of ecosystem at the river mouth was estimated by the tidal flat model. It was found that microalgae on sediment decrease the accumulation of organic matters in the model. Furthermore, the model showed flow of organic matter in bivalve-dominant system become more active than that in control system. Therefore, bivalves might be useful to inhibit the accumulation of organic matters.6.A physical model of staratification and mixing in closed bay was developed. The heat balance and water exchange at bay mouth were taken in consideration. The results show good agreement with observation.

为了建立河口生态系统控制的养分循环模型，对流域、河床、河口和河口的养分行为进行了研究。主要结果如下1。通过对名取河流域养分来源机理的研究，建立了流域养分来源的数值模型，明确了正常水流与洪水的差异。对不同运输方式下的养分负荷进行了评价。对河流中养分运移特征进行了测量和模拟。分析了水流与河床之间的养分交换，确认了河床在循环过程中的重要性。在Abukuma河口观察了盐楔的行为。分析了水与营养物的混合过程。并对营养物在海洋中的扩散进行了研究。在Dubye-Huckel理论的基础上，考虑铁与腐殖质之间的静电相互作用，建立了河口条件下腐殖质-铁络合物的平衡模型。建立的模型很好地解释了腐殖质-铁络合物在河口随着强直强度的增加而解离的过程。利用潮滩模型对河口生态系统行为进行了估算。研究发现，微藻对沉积物的影响减少了模型中有机质的积累。此外，模型还显示，双壳类优势系统的有机质流动比控制系统更为活跃。因此，双壳类可能有助于抑制有机质的积累。建立了封闭湾内星化混合的物理模型。考虑了海湾口的热平衡和水交换。计算结果与观测结果吻合较好。

项目成果

DISTRIBUTION CHARACTERINTICS OF SUSPENDED IN SALT MIXING LAYER OF RIVER MOUTH

河口盐混合层悬浮物的分布特征

• 发表时间: 2005
• 期刊: Annual Journal of Hydraulic Engineering, JSCE Vol.49
• 作者: 熊谷 一清;熊谷 一清;吉野 博;常名 美貴;野口 美由貴;吉野 博;三原 邦彰;三原 邦彰;泉 典洋;Totoku Suprijo;三田村 輝章;Shingo SAKAI
• 通讯作者: Shingo SAKAI

藤井 学: "河川水中における粒状態有機物から生成される溶存態有機物の特性"環境工学研究論文集. 40. 139-149 (2003)

藤井学：“河水中颗粒有机物生成的溶解有机物的特征”环境工程研究杂志40。139-149（2003）。

Sitang PILAILAR: "THE CHARACTERISTIC CHANGE OF FINE PARTICULATE ORGANIC MATTER DUE TO A FLOOD IN THE NANAKITA RIVER"水工学論文集. 47(印刷中). (2003)

Sitang PILAILAR：“纳纳基塔河洪水造成的细颗粒有机物的特征变化”水利工程论文 47（出版中）。

Verification of a NDVI-evapotransipiration model using a single laver model

使用单个紫菜模型验证 NDVI 蒸发模型

• 发表时间: 2004
• 期刊: GIS and RS in hydrology, water resources and environment, IAHS publication No.289
• 作者: 熊谷 一清;熊谷 一清;吉野 博;常名 美貴;野口 美由貴;吉野 博;三原 邦彰;三原 邦彰;泉 典洋;Totoku Suprijo;三田村 輝章;Shingo SAKAI;Norihiro IZUMI;三原 邦彰;Totoku Suprijo;Hiroshi Yoshino et al.;Hiroshi Yoshino et al.;酒井 新吾;Kazukiyo KUMAGAI et al.;泉 典洋;Kazukiyo Kumagai et al.;Watanabe Hiroaki
• 通讯作者: Watanabe Hiroaki

佐野 雄一: "干潟土壊硬さ指標とした底生動物生息環境の評価"第37回日本水環境学会年回講演集. 138 (2003)

佐野佑一：《利用潮滩土壤破坏硬度指数评价底栖栖息地环境》第37届日本水环境学会年会论文集138（2003）。