Development of Ecosystem Model for Optimum Design of Artificial Lagoon

人工泻湖优化设计生态系统模型的开发

• 批准号: 12555282
• 负责人: OTSUKA Koji
• 金额: $ 4.93万
• 依托单位: Osaka Prefecture University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555282/
• 关键词: Enclosed coastal seas; Environmental restoration technologies; Ecosystem model; Carbon fixation effect; Nutrient fixation effect; 人工環礁; 海藻; 炭素固定; 栄養塩固定; 大型海藻; 底質改善; バイオマニピュレーション

The aim of this research is to develop an ecosystem model for optimum design of an artificial lagoon, one of the eco-technologies, which is applicable to environmental restoration of enclosed coastal seas. The research approach consists of field surveys at Inner Sea of Rinku Park in southern part of Osaka Bay, on-site experiments for getting biological process parameters, and ecosystem modeling based on the results of the field surveys and on-site experiments. The results of field surveys showed that seaweeds have large carbon and nutrient fixation functions and oxygen supply functions, but the withering seaweeds become origins of sedimentary organic matter. The results of on-site experiments demonstrated that oxygen consumption rate at sediment mainly depends on the water temperature, and sea cucumbers feed seaweeds by choice. The results of numerical experiments using the developed ecosystem model suggested that the carbon and nutrient fixation effects of the artificial lagoon decreases year by year because of the accumulation of the sedimentary organic matter, and the fixation efficiency increases with decreasing the water depth of the artificial lagoon since the reduction of the light intensity inhibits the growth of seaweeds.

本研究的目的是建立一个生态系统模型，用于优化设计人工泻湖，这是一种生态技术，适用于封闭近海的环境修复。研究方法包括在大坂湾南部的临古公园内海域的实地调查，现场实验，以获得生物过程参数，生态系统建模的基础上，实地调查和现场实验的结果。野外调查结果表明，海藻具有很强的固碳、固营养和供氧功能，但枯萎的海藻成为沉积有机质的来源。现场实验结果表明，底质耗氧速率主要取决于水温，海参对海藻有选择性摄食。利用所建立的生态系统模型进行的数值试验结果表明，由于沉积有机质的积累，人工泻湖的固碳和固氮效果逐年降低，而随着人工泻湖水深的减小，固碳和固氮效率逐渐提高，这是由于光照强度的降低抑制了海藻的生长。

项目成果

大塚耕司, 塩谷淳, 藤原峰生: "閉鎖性海域における底泥酸素消費の現地計測"日本沿岸域学会論文集. Vol.14. 137-144 (2002)

Koji Otsuka、Jun Shioya、Mineo Fujiwara：“封闭海域沉积物耗氧量的现场测量”，日本海岸带学会论文集，第 14 卷，137-144（2002 年）。

Otsuka, K. and Nakatani, N.: "Estimation of Carbon and Nutrient Fixation Effects of an Artificial Lagoon in Osaka Bay"Proc. of 20th Int. Conf. on Offshore Mechanics and Arctic Engineering. OMAE01-5036. 1-8 (2001)

Otsuka, K. 和 Nakatani, N.：“大阪湾人工泻湖的碳和养分固定效应估算”Proc。

K.Otsuka, N.Nakatani: "Estimation of Carbon and nutrient Fixation Effects of an Artificial Lagoon in Osaka Bay"Proc.of 20th Int.Conf.on Offshore Mechanics and Arctic Eng.. OMAE 01/OMS・5036. 1-8 (2001)

K.Otsuka、N.Nakatani：“大阪湾人工泻湖的碳和营养固定效应的估算”Proc.of 20th Int.Conf.on Offshore Mechanics and Arctic Eng.. OMAE 01/OMS・5036。 (2001)

Otsuka, K., Nakatani, N.: "Estimation of Carbon and Nutrient Fixation Effects of an Artificial Lagoon in Osaka Bay"Proc. of 20th Int. Conf. on Offshore Mechanics and Arctic Engineering. OMAE01-5036. 1-8 (2001)

Otsuka, K., Nakatani, N.：“大阪湾人工泻湖的碳和养分固定效应估算”Proc。

Otsuka, K.: "States and Subjects of Environmental Restoration Technologies - Examples and Its Assessments -"Proc. of 3rd Symposium of the Japan Society on Water Environment. 139-140 (2000)

Otsuka, K.：“环境恢复技术的现状和主题 - 示例及其评估 -”Proc。