Tidal flat development trial utilizing dredged sludge and aquatic weeds in an eutrophic closed water system.

在富营养化封闭水系统中利用疏浚污泥和水草进行滩涂开发试验。

• 批准号: 16380161
• 负责人: OKI Yoko
• 金额: $ 10.22万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16380161/
• 关键词: Eutrophic lake; Artificial tidal flat development; Aquatic weed community; Water quality; Biotope; Polluted load; Planting technology; Environment conservation activities; 栄養体繁殖; 微地形変化; 水流解析

This study attempts creation of a biotope and reduction in water pollution by developing aquatic weed community in an artificial tidal flat using dredged sludge in Lake Kojima located in southern Okayama Prefecture, where nutrient enrichment has advanced. Changes in physical and chemical factors affecting the tidal flat are grasped to predict the material balance between living things in the tidal flat, water systems, and bottom sludge. We propose continued operation and maintenance of the biotope. Results obtained are described below.1. Basic study related to creation and development of ecosystem in tidal flat developed land : Results of surveys of community development of planting species in a natural state revealed that Zizania latifolia, Schoenoplectus validus, and Typha angustifolia developed the community and formed a vegetation revetment. Furthermore, the larger the plant community, the more shellfish reside there. Submerged plants were planted in porous ceramics to develop a pl … More anting method.2. Grasping of formation processes of physical and chemical factors of tidal flat developed land : Measurements of EC and pH of the soil at the fresh water side from the waterfront line were higher than those at the continental area, both at the surface layer and 5cm below ground. Although sediment and local scour are generated according to the presence or absence of typhoons, development of the underground parts of plant communities made a great contribution.3. Survey of the pollution load from farmland flowing into Lake Kojima : Although the farmland has nitrogen reduction action, loading of phosphorus to the outside tends to increase concomitantly with increased amounts of applied fertilizer and precipitation.4. Survey of distribution of aquatic weeds and water pollution in Lake Kojima : Although mass generation of Trapa japonica occurred annually, no indication of regrowth of submerged plants was recognized. Regarding water quality, no tendency of phosphorus reduction was noticed.5. Model analysis of tidal flat developed land by data processing : Flows generated around an artificial tidal flat in Lake Kojima were analyzed quantitatively.As described above, establishment of an ecosystem according to its food chain, accumulation of organic substances, and purification of water quality were confirmed by planting of large aquatic weeds in the artificial tidal flat. However, based on these results, proposal of a method of operation and maintenance of the biotope is premature. Less

这项研究尝试使用野生湖中的小岛湖中的杂草社区中的杂草污染减少，位于冈山县南部的小岛湖中，养分富集。在下面介绍了与污泥的污泥。并形成了植被的植被。贝类居住在多孔的陶瓷中，开发了PL……更多的肛门方法。2海滨比大陆区域的林，根据地面的表面层和5厘米，根据台风的存在或不存在，植物社区的地下部分的发展做出了巨大的贡献。小岛湖：尽管农田具有减少氮的作用，但向外部的磷加载倾向于与增加的肥料和降水量增加。4。 japonica每年发生，legrowmer的植物是曾经是Zed的。如上所述，定量是食物链，有机物质的积累以及水质的纯化是由大型水生杂草在人工潮汐中固定的。生物管还为时过早。

项目成果

Numerical study of currents generated in a lake, and verification by experiment

湖泊产生水流的数值研究及实验验证

• 发表时间: 2007
• 作者: Shinya Sumida;Ying Liu;Yu Li;Kazihiro Yamamoto;Majda Ceric;Masaji Watanabe
• 通讯作者: Masaji Watanabe

NUMERICAL AND EXPERIMENTAL STUDY OF EFFECTS DUE TO CURRENTS TO AN ARTIFICIAL FLAT IN A LAKE

水流对湖中人工公寓影响的数值和实验研究

• 发表时间: 2004
• 作者: Masaji Watanabe;Tadashi Adachi;Yoko Oki
• 通讯作者: Yoko Oki

Relationship between soil moisture and internal anatomy of runner and stem of Phragmites japonica

土壤水分与芦苇匍匐茎及茎内部解剖结构的关系

• 发表时间: 2006
• 作者: Jyunichi Nakamura;Y.Oki;T.Adachi
• 通讯作者: T.Adachi

Effect of planning method and microenvironment on the community development of Iris pseudacorus in artificial tidal flat

规划方法和微环境对人工滩涂黄菖蒲群落发展的影响

• 发表时间: 2005
• 作者: Yoshitaka Nakashima;Yoko Oki
• 通讯作者: Yoko Oki

COMPUTATIONAL ANALYSIS AND MEASUREMENT USING GLOBAL POSITIONING SYSTEM FOR FLOW GENERATED IN A LAKE

利用全球定位系统对湖泊流量进行计算分析和测量

• 发表时间: 2007
• 期刊: Proceedings of the 3rd IMT-GT Regional Conference on Mathematics, Statistics and Applications Universiti Sains Malaysia 8
• 作者: Masaji Watanabe;Tadashi Adachi;Yoko Oki
• 通讯作者: Yoko Oki