Study on Response of Physical Phenomena to Wetland Ecosystem in Large River Mouth

大河口湿地生态系统物理现象响应研究

• 批准号: 10650509
• 负责人: NAKANO Susumu
• 金额: $ 2.37万
• 依托单位: The University of Tokushima
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650509/
• 关键词: wetland; river mouth; sand-bar; vegetation; genus Uca; river-bed variation; ecosystem; estuary; 河口域; シオマネキ; 河状履歴; スナガニ類; 数値解析; 現地調査; 主成分分析; 吉野川; 地形変動; 底生動物; 主成分解析; 数値計算; 植物群落; 潮汐

1) Field survey of the habitat distribution of Genus Uca that is classified "Near Threatened species" were carried out on river-mouth flats in seven prefectures. The relationship between bed material properties and inhabiting density was examined by using the neural network analysis.2) To accumulate the basic data for verifying the numerical simulation, water qualities and zooplankton were observed in the Yoshino river mouth. To investigate the response of physical phenomena to wetland ecosystems, at the same time, 2D river-bed variation program and quasi-3D flow simulation program were improved and examined their accuracy.3) A detailed meshed vegetation map is presented based on the results of a full vegetation survey. Two methods to predict plant community distribution were proposed. One is a method using the preference curve developed the concept of PHABSIM (Physical Habitat Simulation System) and the other is the neural network analysis.4) Field observations were carried out in five wetlands in the Yoshino river estuary during 1999 and 2000. The distribution of Ocypodidae was investigated and a distribution pattern prediction model was developed. The assimilation function of organic matter by a common Ocypodidae Macrophthalmus japonicus was examined quantitatively to evaluate one of the wetland ecosystems worth.5) New practical methods to utilize the eigen functions obtained by Principal Component Analysis (PCA) were proposed. They can be succeeded to extract the temporal periodicity and the spatial path of sand movement, which are important for understanding the topography change.

1）对被归类为“受威胁物种”的栖息地分布的现场调查是在七个县的河道公寓上进行的。通过使用神经网络分析检查了床材料特性与居住密度之间的关系。2）为了积累基本数据以验证数值模拟，在吉诺河口中观察到了数值模拟，水品质和浮游动物。为了研究物理现象对湿地生态系统的响应，同时，根据完整的植被调查的结果，提出了详细的网状植被图。提出了两种预测植物社区分布的方法。一种是使用偏好曲线开发的方法（物理栖息地模拟系统）的概念，另一种是神经网络分析。4）在1999年和2000年期间Yoshino River河口的五个湿地进行了现场观测。对Ocypodidae的分布进行了研究，并开发了分布模型预测模型。定量检查了常见的ocypodidae巨毛巨毛巨毛的同化功能，以评估湿地生态系统的价值之一。5）提出了使用原理成分分析（PCA）获得的新实用方法，以利用新的实用方法。它们可以成功提取时间周期性和沙子运动的空间路径，这对于理解地形变化很重要。

项目成果

宇野宏司: "四国地方における稀少種「シオマネキ」の生息環境特性"地球環境シンポジウム講演論文集. 8. 99-104 (2000)

Hiroshi Uno：“四国地区稀有招潮蟹的栖息地特征”全球环境研讨会论文集。8. 99-104（2000）。

北野利一、中野晋、岡彰紀、間瀬肇: "主成分解析による新たな地形変動分析法に関する理論的検討"海岸工学論文集. 46巻. 626-630 (1999)

Toshikazu Kitano、Susumu Nakano、Akinori Oka、Hajime Mase：“使用主成分分析的新地形变化分析方法的理论研究”海岸工程杂志第 46 卷。626-630 (1999)。

北野利一: "主成分分析による新たな地形変動分析法に関する理論的検討"海岸工学論文集. 46. 626-630 (1999)

Toshikazu Kitano：“使用主成分分析的新地形变化分析方法的理论研究”海岸工程杂志 46. 626-630 (1999)。

S.Nakano, T.Kitano and M.Fujikawa: "Topography Change in the Lower Reaches of the Yoshino River and Numerical Simulation on Deformation Process of River-mouth Bar due to Large Flood"Proceedings of Coastal Engineering, JSCE. Vol.46. 641-645 (1999)

S.Nakano、T.Kitano和M.Fujikawa：“吉野川下游地形变化及大洪水引起的河口坝变形过程的数值模拟”日本海岸工程学会论文集。

北野利一: "複素主成分解析の変動データへの応用"京都大学防災研究所年報. 42. 369-379 (1999)

Toshikazu Kitano：“复杂主成分分析在波动数据中的应用”京都大学防灾研究所年度报告 42. 369-379 (1999)。