| Project/Area Number |
15K14819
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Rural environmental engineering/Planning
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| Research Institution | Niigata University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
藤巻 晴行 鳥取大学, 乾燥地研究センター, 教授 (90323253)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 土のキャピラリーバリア / 節水かんがい / 砂礫土 / 土中水分計測 / 土の不飽和水分特性 / 塩分集積 / 雨水ハーベスティング / 乾燥・半乾燥地 / 砂礫材料 / パレスチナ国ヨルダン川西岸地区 / 土の毛管障壁機能 / 塩分集積制御 / 土中水分測定 / 土の電気伝導度測定 / パレスチナ西岸地区 |
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| Outline of Final Research Achievements |
A simple soil layer system which is composed of a finer soil layer underlain by a coarser soil one shows a characteristic property of capillary barrier (CB). Gravel as the coarser soil being embedded in a layer at some shallow depth in a farmland, infiltration water from the soil surface is retained just above an interface between the soil layers due to a physical difference in hydraulic properties of the soils. Vegetables will uptake this soil water sufficiently for their growth even under a scarcity of irrigation water. As the gravel layer cuts upward movement of water from a groundwater, it is expected that the CB soil system will also bring an effective prevention of salinization caused by the salt groundwater. In the study, a practical aoolicability of water-saving irrigation and soil salinization prevention provided by the CB soil system was investigated based on field planting experiment. A feasibility study of the CB system was also conducted in the semi-arid area of Palestine.
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