Effects of a snow-compaction treatment on soil freezing, snowmelt runoff, and soil nitrate movement: A field-scale paired-plot experiment
| Autor: | Yosuke Yanai, Yukiyoshi Iwata, Tomotsugu Yazaki, Tomoyoshi Hirota |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Hydrology
010504 meteorology & atmospheric sciences 0208 environmental biotechnology 02 engineering and technology Snow 01 natural sciences 020801 environmental engineering Infiltration (hydrology) chemistry.chemical_compound Nutrient Nitrate chemistry Snowmelt Soil water Environmental science Soil horizon Surface runoff 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | SC30201905100011 NARO成果DBd C30201903190002_6501.pdf |
| ISSN: | 0022-1694 |
| DOI: | 10.1016/j.jhydrol.2018.10.016 |
| Popis: | A frozen soil layer may impede snowmelt infiltration, resulting in a large amount of runoff that influences the soil water balance and anion movement in the soil profile. To examine the relationships among soil frost depth, snowmelt runoff, and nitrate leaching in agricultural fields, we measured both the snowmelt runoff for three winters and other environmental factors including the soil frost depth and nitrate content in a ∼10,000 m2 field. We divided the field into two subplots: one was maintained in a natural snow cover condition (the control plot), and the snow cover was compacted on the other plot (the treated plot) to enhance the development of the soil frost depth. In all three winters, soil frost depths in the control plot were 0.4 m and a large amount of snowmelt runoff was observed in the treated plot. The depth of the peak nitrate concentration after the snowmelt period was shallower in the treated plot compared to the control plot. Moreover, a significant linear relationship was observed between (1) the amount of nitrate in the 0–0.3 m depth after the snowmelt period and (2) the total amount of snowmelt infiltration calculated by subtracting the amount of snowmelt runoff from the amount of snowmelt water. These results suggest that snow compaction can be a promising technique to develop a uniform soil frost depth in large-scale fields, which consequently controls the soil water and nutrient movement in the soil layer. |
| Databáze: | OpenAIRE |
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