Water and nitrate movements in an agricultural field with different soil frost depths: Field experiments and numerical simulation

Yukiyoshi Iwata, Tomotsugu Yazaki, Shinji Suzuki, Tomoyoshi Hirota

研究成果: ジャーナルへの寄稿学術誌査読

9 被引用数 (Scopus)

抄録

To evaluate water and anion movement in an agricultural field in different frost conditions, a paired-plot field experiment was conducted at an agricultural site in northern Japan where a significant decrease in the frost depth has occurred during the past 20 years. Snow cover was removed to enhance soil freezing in one plot (treated plot), whereas natural conditions were maintained in a control plot. The maximum frost depth was 0.43m in the treated plot and 0.11m in the control plot, which induced substantial differences in water movement throughout the winter. A substantial amount of water moved upward before the onset of snowmelt. However, nitrate did not move markedly before the snowmelt period in either plot. The amount of snowmelt infiltration in the control plot was larger than in the treated plot. Correspondingly, the peak of nitrate content in the control plot was deeper than that in the treated plot after the snowmelt period. Soil freezing, snow accumulation and snowmelt processes were simulated reasonably well using a one-dimensional numerical model: Simultaneous Heat and Water (SHAW). Nevertheless, the model performed poorly for simulating soil thawing and soil water movement, suggesting a need for improvement.

本文言語英語
ページ(範囲)157-165
ページ数9
ジャーナルAnnals of Glaciology
54
62
DOI
出版ステータス出版済み - 7月 2013
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 地表過程

フィンガープリント

「Water and nitrate movements in an agricultural field with different soil frost depths: Field experiments and numerical simulation」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル