Changes of water quality under an agricultural water use restructuring project and possibility of introduction of an environmental water

农业用水改造项目下的水质变化及引入环境水的可能性

• 批准号: 23580324
• 负责人: YAMAMOTO Tadao
• 金额: $ 3.33万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23580324/
• 关键词: 窒素; 水質; 河跡湖; 農業水利; 基盤整備; 負荷; 水質環境; 農業水利再編; 水文; 環境用水

The objective of this study is to evaluate the impacts of the agricultural water use restructuring project on the physical and chemical water properties of the oxbow lake in Hokkaido, Japan. We predicted that decreased water removal after the pumping station was abolished would increase TN concentrations in the lake water. Though removal of water by pumping tends to take pollution from the lake, TN concentrations fell after pumping station was abolished. The cause of decreased TN concentration was mainly decreased organic nitrogen concentration. Moreover, the TN load balance changed from an outflow type to a storage type in 2011 and 2013 despite decreased input load into the lake.We suggest that this reduction in TN concentration after 2011 reflects the decreased organic nitrogen concentration due to biological purification effects. This is because increasing retention time caused load removal from the lake, and the water retention time also increased significantly in this lake.

本研究的目的是评估农业用水重组项目对日本北海道牛轭湖物理和化学水性质的影响。我们预测，取消泵站后去除水量的减少将增加湖水中的总氮浓度。虽然抽水往往会带走湖泊中的污染，但废除抽水站后总氮浓度有所下降。 TN浓度下降的原因主要是有机氮浓度下降。此外，尽管入湖负荷减少，但2011年和2013年TN负荷平衡从流出型转变为储存型。我们认为2011年后TN浓度的下降反映了生物净化效应导致有机氮浓度下降。这是因为滞留时间的增加导致了湖泊负荷的减少，并且该湖中水的滞留时间也显着增加。

项目成果

Factors affecting paddy landscape from the perspective of landscape structure

景观结构视角下稻田景观影响因素

• 发表时间: 2014
• 作者: Yamamoto Tadao;Nomoto Ken
• 通讯作者: Nomoto Ken

Effect of water purification at artificial agricultural drainage in dairy farming watershed

奶牛养殖流域人工农业排水水质净化效果

• 发表时间: 2012
• 作者: Yamamoto Tadao;Inoue Takashi;Nagasawa Tetuaki
• 通讯作者: Nagasawa Tetuaki

Change of Oxbow Lake Water Quality Under the Agricultural Water Use Restructuring Project

农业用水改造工程下牛轭湖水质变化

• 发表时间: 2013
• 作者: Yamamoto Tadao;Okazaki Hiroki
• 通讯作者: Okazaki Hiroki

農業水利再編にともなう河跡湖の水質変化

农业水资源重组导致河湖水质变化

• 发表时间: 2012
• 作者: Yamamoto Tadao;Okazaki Hiroki;笹原和哉;岡崎宏軌,山本忠男,野本健,高木優次
• 通讯作者: 岡崎宏軌,山本忠男,野本健,高木優次

水田地区における水管理が排水水質に及ぼす影響

稻田水管理对废水水质的影响

• 发表时间: 2011
• 期刊: 農業農村工学会北海道支部研究発表会講演集
• 作者: MOHAMMED KAMRUL HASAN;YAMAMOTO TADAO and NAGASAWA TETUAKI;岡崎宏軌，山本忠男，野本健，高木優次
• 通讯作者: 岡崎宏軌，山本忠男，野本健，高木優次