Study On Ecology And Water Quality In Lake Koyama

小山湖生态与水质研究

• 批准号: 09460110
• 负责人: YOSHIDA Isao
• 金额: $ 4.29万
• 依托单位: TOTTORI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09460110/
• 关键词: Water purification; Green Algae; Releasing fish; pH; Salt content; Dissolved Oxygen; Activation; Volatile Organic Compound; 放魚; 養魚; 浚渫; 湖山池; 塩分濃度; 養魚池; 降水量; 画像解析; 高温好気法; アオコ水; 利水

Although this was last year of this research project, new study was also tried continuing the last two years study.Yoshida and his co-researchers constructed the observation bridge near the deepest place in Lake Koyama, and recorded the changes of dissolved oxygen, electric conductivity, and pH at the 5.5m deep under water surface at two hour intervals. As the results, the formation of oxygen-deficient water was found at 4.5m deeper even in Autumn and Winter. It is natural that this phenomena will occur in Spring and summer as the water temperature is getting warmer. Volatile organic compounds in the river Nagara, which flows into Lake Koyama and in the river Koyama flowing out of Lake Koyama, were analyzed. It derived from this analysis that VOC in the river Nagara and Lake Koyama was found less than that in the river Koyama which flows through the Koyama village.Dr.Sitizyou crossed crucian carp, hatched eggs, raised fries in three fish breeding ponds. Primary school students attached to Tottori University helped us by releasing young fishes like last year.Mr.Hasegawa continued recording the changes of chlorine ion in the lake. The results gained during last three years were written into two papers and made presentation at the International Conference held in Bangkok, 1999.

虽然这是这个研究项目的最后一年，但新的研究也在尝试延续过去两年的研究。吉田和他的同事们在小山湖最深的地方附近建造了观测桥，每隔两小时记录一次5.5米深水下的溶解氧、电导率和pH值的变化。其结果是，即使在秋冬季，也可以在4.5米深的地方发现缺氧水的形成。随着水温变暖，春夏两季自然会出现这种现象。对流入小山湖的长加拉河和流出小山湖的小山河中的挥发性有机化合物进行了分析。根据这一分析得出，长加拉河和小山湖的VOC含量低于流经小山村的小山河的VOC。司提有博士在三个养鱼池里杂交鲫鱼、孵化卵、养殖鱼苗。鸟取大学附属小学的学生帮助我们像去年一样放生了幼鱼。长谷川先生继续记录湖中氯离子的变化。在过去三年中取得的成果被写入两篇论文，并在1999年在曼谷举行的国际会议上作了介绍。

项目成果

Sitizyou,Yoshida and Inosako: "Relationship Between Raising of Fish and Water Quality"Civil and Environmental Engineering Conference Bangkok. PART I. 87-92 (1999)

Sitizyou、Yoshida 和 Inosako：“养鱼与水质的关系”曼谷土木与环境工程会议。

猪迫耕二. 吉田勲: "浮上分離法による藻類を中心とした浮上物質の湖水からの除去" 鳥大農研報. 59. 1-5 (1997)

Koji Inosako. Isao Yoshida：“通过浮选分离法去除湖水中的漂浮物质，主要是藻类”，伯德大学农业研究报告 59. 1-5 (1997)。

福井真一、吉田勲: "土地改良区における現状と課題-中山間地の小規模土地改良区の例-"農村計画学会誌. 18巻別冊. 157-162 (1999)

Shinichi Fukui，Isao Yoshida：“土地改良区的现状和问题 - 丘陵和山区小规模土地改良区的例子”乡村规划学会杂志第 18 卷，单独发行（1999 年）。

猪迫耕二 他3名: "ラインソース灌漑のための畑地潅漑スケジューリング" 農業土木学会論文集. 198. 77-85 (1998)

Koji Inosako 等 3 人：“线源灌溉的田间灌溉调度”日本农业土木工程师学会汇刊 198. 77-85 (1998)。

S.FUKUI, I.YOSHIDA: "PRESENT STATE AND PROBLEM OF LAND IMPROVEMENT DISTRICT"TRANSACTIONS OF JAPANESE SOCIETY AND RURAL PLANNING. VOL.18. 157-162 (1999)

S.Fukui、I.YOSHIDA：日本社会与农村规划协会《土地改良区的现状和问题》交易。