Development of a saltwater management system to simultaneously prevent or mitigate tsunami damage and rehabilitate farmland
| Project/Area Number |
25871100
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Rural environmental engineering/Planning
Natural disaster / Disaster prevention science
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| Research Institution | National Agriculture and Food Research Organization |
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Principal Investigator |
Nakaya Tetsuo 国立研究開発法人農業・食品産業技術総合研究機構, その他部局等, 研究員 (60414447)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 塩害 / 農地復旧 / SCADA / 東日本大震災 / 津波 / 地下水 / 淡塩境界 / 海水侵入 |
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| Outline of Final Research Achievements |
We have proposed a method to limit saltwater intrusion from the ocean by supplying fresh water below the ground surface through irrigation in areas that were greatly deal damaged by the 2011 Tohoku Pacific Ocean Tsunami. In these areas, farmland continues to sustain damage from salt water infiltration as a result of subsidence of the land. Our numerical analysis revealed that it's possible to drain a field without letting the saltwater-freshwater interface rise.
To accomplish our goals, we developed a SCADA to implement our method at the site. This system is based on an algorithm for controlling groundwater levels by irrigation, thereby automatically increasing the depth to the saltwater-freshwater interface, by controlling a pump based on monitoring of EC. Our method should be an effective way to reduce saltwater damage in many of the farmland areas affected by the tsunami, particularly if it is complemented by measures to reduce or prevent saltwater intrusion and promote drainage.
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Report
(4 results)
Research Products
(12 results)
