Characteristics of Nitrogen Outflow from Mountain Area in the Northwest of KantoPlain

关东平原西北部山区氮流出特征

• 批准号: 15560439
• 负责人: KOBATAKE Shigeki
• 金额: $ 2.43万
• 依托单位: Gunma University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560439/
• 关键词: Water quality of mountain stream; Nitrogen deposition; Nitrogen saturation; Transport of air pollutants; 環境汚染

The runoff characteristics of NO_3-N in forested mountain areas located in the northwest of Kanto Plain is investigated by field observation from 2001. The observation consists of two components, one is NO_3-N concentration in mountain stream water and the other is vertical profile of NO_3-N concentration in soil water. It is clarified that the large difference of NO_3-N concentration in mountain stream water exists between the west side and the east side of Tone River. Though NO_3-N concentration in soil water shows the almost similar tendency, vertical profile shows three types that do not exactly correspond to the areal distribution of concentration. By the correlation analysis, there is positive correlation between rainfall events and increase of NO_3-N concentration in mountain stream water in the east side of Tone River, where the concentration is low. On the contrary, no correlation is found out in the west side of Tone River, where the concentration is high. These phenomena correspond to the nitrogen saturation

从2001年开始，通过野外观测，对关东平原西北部森林山区NO_3-N径流特征进行了调查。观测结果由两个部分组成，一是山间溪流水中NO_3-N浓度，二是土壤水中NO_3-N浓度垂直剖面。明确了利根川西侧和东侧山溪水中NO_3-N浓度存在较大差异。虽然土壤水中NO_3-N浓度表现出几乎相似的趋势，但垂直剖面显示出与浓度区域分布不完全对应的三种类型。相关分析表明，在浓度较低的利根川东侧，降雨事件与山溪水中NO_3-N浓度升高呈正相关。相反，在浓度较高的利根川西侧则没有发现相关性。这些现象对应于氮饱和度

项目成果

群馬県における渓流水の窒素濃度分析とその考察

群马县山溪水氮浓度分析及探讨

• 发表时间: 2004
• 期刊: 土木学会年次学術講演会講演概要集 第59-II
• 作者: 小葉竹重機;長谷川香織 他2名
• 通讯作者: 長谷川香織 他2名

On the Nitrogen Concentration of the Mountain Stream in the Gunma Prefectrue

群马县溪流氮浓度研究

• 发表时间: 2004
• 期刊: Proceedings of the 59^<th> Annual Conference of the Japan Society of Civil Engineering 2
• 作者: Kobatake Shigeki;Hasegawa Kaori;Asakura Yusuke;Matsumoto Kensaku
• 通讯作者: Matsumoto Kensaku

関東平野北西縁部における窒素流出特性

关东平原西北缘氮径流特征

• 发表时间: 2005
• 期刊: 土木学会水工学論文集 第49巻(2)
• 作者: 長谷川香織;小葉竹重機
• 通讯作者: 小葉竹重機

Characteristics of Nitrogen Outflow from Mountain Area in the Northwest of KantoPlain

关东平原西北部山区氮流出特征

• 发表时间: 2005
• 期刊: Annual Journal of Hydraulic Engineering, JSCE Vol.46
• 作者: Hasegawa Kaori;Koabatake Shigeki
• 通讯作者: Koabatake Shigeki