Development of the system of desalinization and protection of salt accumulation for sustainable utilization of farm lands in arid/semi-arid regions

• Project/Area Number: 25450359
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Rural environmental engineering/Planning
• Research Institution: Tottori University
• Principal Investigator: INOSAKO KOJI 鳥取大学, 農学部, 教授 (60243383)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: リーチング / 塩類集積 / キャピラリーバリア / 溶質移動 / 毛管上昇 / 浸潤

Outline of Final Research Achievements

A farm land management method was developed to remove excess salts from a surface soil layer and protect salt accumulation in a root zone. In this method, a high permeable material zone or layer are placed in soil. The zone is called a drainage tunnel (DT) and the layer is called a capillary barrier (CB). They are used as single agent or in combination for the condition of soil permeability. The performances for desalinization and protection of salt accumulation were assessed by model and numerical experiments.
The results were summarized as follows: 1) CB used in high permeable soil did not inhibit leaching of salts. Moreover it enforced water retention ability of surface layers and intercepted capillary rise from lower layers. 2) The combination use of CB and DT rapidly drained leaching water from surface layers to lower layers in low permeable soil. 3) The combination use enabled to perfectly intercept capillary rise from shallow underground water and protect salt accumulation.

Research Products

• [Journal Article] 高塩分濃度の砂に対するWETマルチセンサーの測定精度の評価 (2016)
  • Author(s): 井上光弘・齊藤忠臣・猪迫耕二・藤巻晴行
  • Journal Title: 日本砂丘学会誌 Volume: 63 Pages: 1-10
  • NAID: 40020933028
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 粗粒層の毛管障壁機能が作土層の水分と塩分の移動に与える影響 (2015)
  • Author(s): 猪迫耕二，齊藤忠臣，西中菫，藤巻晴行
  • Journal Title: 応用水文 Volume: 27 Pages: 1-7
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 低透水性土壌におけるリーチング水の浸透促進法の開発 (2015)
  • Author(s): 猪迫耕二・阿部晴奈・齊藤忠臣
  • Organizer: 第61回日本砂丘学会全国大会
  • Place of Presentation: 弘前大学（青森県弘前市）
  • Year and Date: 2015-08-20
• [Presentation] 低透水性土壌に適したリーチング方法の開発 (2014)
  • Author(s): 猪迫耕二，齊藤忠臣，藤巻晴行
  • Organizer: 鳥取大学乾燥地研究センター共同研究発表会
  • Place of Presentation: 鳥取大学乾燥地研究センター
  • Year and Date: 2014-12-06 – 2014-12-07
• [Presentation] 粗粒層の毛管障壁機能が作土層の水分と塩分の移動に与える影響 (2014)
  • Author(s): 猪迫耕二，齊藤忠臣，西中菫，藤巻晴行
  • Organizer: 農業農村工学会水文・水環境研究部会シンポジウム
  • Place of Presentation: 東京農工大学
  • Year and Date: 2014-11-18 – 2014-11-19
• [Presentation] 粗粒層を有する塩析出土壌におけるリーチング前後の水分・塩分移動 (2013)
  • Author(s): 猪迫耕二，西中菫，齊藤忠臣，井上光弘，藤巻晴行
  • Organizer: 日本砂丘学会
  • Place of Presentation: 東京工業大学キャンパスイノベーションセンター（東京都世田谷区）
• [Presentation] Salt and water movement after leaching in salt-accumulated soil under the condition of existence of a coarse textured layer (2013)
  • Author(s): Koji Inosako, Tadaomi Saito
  • Organizer: nternational Conference of Desert Technology 11
  • Place of Presentation: Hilton hotel (San Antonio, Texas, USA)