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Impact analysis of the decline of agricultural land-use on flood risk and material flux in hilly and mountainous watersheds

机译：丘陵和山地流域洪水风险与物质通量下降的影响分析

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Agricultural land-use has been reduced by mainly urbanization and devastation in Japan. The objective of this study is to evaluate the impact of the decline of agricultural land-use on flood risk and material flux in hilly and mountainous watersheds using Soil Water Assessment Tool. The results indicated that increase of flood risk due to abandonment of agricultural land-use. Furthermore, the abandonment of rice paddy field on steep slope areas may have larger impacts on sediment discharges than cultivated field. Therefore, it is suggested that prevention of expansion of abandonment of rice paddy field is an important factor in the decrease of yields of sediment and nutrients.

机译：农业用途通过日本的城市化和破坏，已经减少了。本研究的目的是评估使用土壤水分评估工具的丘陵和山地流域洪水风险和物质通量下降的影响。结果表明，由于放弃农业用途而增加了洪水风险。此外，放弃陡坡区域上的稻田对沉积物排放的影响比栽培的田地更大。因此，建议防止遗弃稻田的扩大是沉积物和营养产量降低的重要因素。

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《IUGG General Assembly》|2015年||共6页
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Y. Shimizu; S. Onodera; H. Takahashi; K. Matsumori;
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中图分类海洋学;
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Impact analysis of the decline of agricultural land-use on flood risk and material flux in hilly and mountainous watersheds

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