Groundwater nitrate contamination in small agriculture area: assessing the source and process using isotopes and ions

• WIJAYANTI Yureana

  Interdisciplinary Graduate School of Medicine and Engineering, Univ. of Yamanashi (4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan)

• NAKAMURA Takashi

  International Research Center for River Basin Environment (ICRE), Univ. of Yamanashi (4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan)

• NISHIDA Kei

  International Research Center for River Basin Environment (ICRE), Univ. of Yamanashi (4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan)

• HARAMOTO Eiji

  International Research Center for River Basin Environment (ICRE), Univ. of Yamanashi (4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan)

• SAKAMOTO Yasushi

  International Research Center for River Basin Environment (ICRE), Univ. of Yamanashi (4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan)

抄録

Source identification of nitrate contamination in groundwater is an important first step for groundwater management and quality prediction. Therefore, a small scale field research was conducted in an agriculture-dominated alluvial fan in Kofu, Japan, where nitrate contamination was found in the groundwater. Methods used in this study were combining isotopes, ions (biochemical process) and precipitation data (physical process) to understand the nitrate source and process leading to the groundwater nitrate contamination. Our investigations suggest that the nitrate from manure source gave significantly larger contribution than fertilizer. In winter period, there was no strong evidence that anthropogenic nitrate exist in the groundwater. It also found that denitrification process might occur during the recharge process, hence reducing the nitrate concentration. As a preliminary step to describe groundwater dynamics, isotopes and ions provide effective tools to trace sources of contamination and to study processes affecting nitrate.

収録刊行物

• 土木学会論文集Ｂ１（水工学）

  土木学会論文集Ｂ１（水工学） 69 (4), I_223-I_228, 2013

  公益社団法人 土木学会

キーワード

• nitrate contamination
• recharge
• nitrogen isotopes
• major ions
• groundwater and topsoil

詳細情報

• CRID: 1390282680328515456
• NII論文ID: 130004558256
• DOI: 10.2208/jscejhe.69.i_223
• ISSN: 2185467X
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可