Evaluation of drainage improvement and land reclamation projects from the perspective of mitigation of global warming

2012 Fiscal Year Final Research Report

• Project/Area Number: 23658190
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Irrigation, drainage and rural engineering/Rural planning
• Research Institution: The University of Tokyo
• Principal Investigator: IIDA Toshiaki 東京大学, 大学院・農学生命科学研究科, 准教授 (30193139)
• Co-Investigator(Kenkyū-buntansha): OSAWA Kazutoshi 宇都宮大学, 農学部, 准教授 (30376941) ; ISHIDA Tomoyasu 宇都宮大学, 理事 (00159740)
• Project Period (FY): 2011 – 2012
• Keywords: 地球温暖化ガス排出削減 / 環境調和型農林水産 / 土壌圏現象 / 農業土木 / 排水改良 / 土地改良事業 / メタン / 温室効果ガス

Research Abstract

From the perspective of mitigation of global warming, the quantitative evaluation of the effect of a drainage improvement project on reduction of the methane emission was attempted, taking an example at a region in the command area of Imbanuma land improvement district in Chiba prefecture. The CO2 emission by completion of the drainage improvement project was estimated to be 0.518 t-CO2/(ha・y). The planed maximum water requirement rate was 2 mm/d greater after the project than that before the project. Taking the obtained results by column experiments into account, it was estimated that the 2 mm/d increase in the water requirement rate brought about the methane emission reduction of -0.270～11.9 t-CO2/(ha・y). The results of field experiments suggested that the drainage improvement project leads to methane emission reduction of 4.5 ～ 8.3 t-CO2/(ha・y), which corresponded to the estimation based on the column experiments.

Research Products

• [Journal Article] 冬季の沖縄県北部亜熱帯広葉樹林地域におけるCO2フラックスの地点および観測日による変動実態 (2012)
  • Author(s): 酒井一人,仲村渠将,吉永安俊,長野敏英,大澤和敏,石田朋靖
  • Journal Title: 土壌の物理性 Volume: 122 Pages: 23-31
  • Peer Reviewed
• [Presentation] 水田における冬期湛水と有機資材投入が温室効果ガス放出へ与える影響 (2012)
  • Author(s): 大澤和敏,福富真奈美,池田廉,平井英明
  • Organizer: 平成24年度農業農村工学会大会講演会
  • Place of Presentation: 北海道大学高等教育推進機構
  • Year and Date: 2012-09-19
• [Presentation] 熱帯泥炭地の再湛水に伴うCH4及びCO2放出速度の測定 (2012)
  • Author(s): 鈴木優輔,大澤和敏,長野敏英,石田朋靖
  • Organizer: 平成24年度農業農村工学会大会講演会
  • Place of Presentation: 北海道大学高等教育推進機構
  • Year and Date: 2012-09-19
• [Presentation] Effect of percolation rate on methane emission from paddy soil columns (2011)
  • Author(s): Dei, H., Iida, T., Okajima, K., Noda, K., Kimura, M.
  • Organizer: PAWEES 2011 International Conference
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 2011-10-27
• [Presentation] 水田土壌での浸透速度の違いがメタン放出に及ぼす影響 (2011)
  • Author(s): 出井宏樹,飯田俊彰,木村匡臣,岡島賢治
  • Organizer: 平成23年度農業農村工学会大会講演会
  • Place of Presentation: 九州大学箱崎キャンパス
  • Year and Date: 2011-09-07
• [Presentation] 農地における有機資材投入に伴う土壌有機炭素貯留 (2011)
  • Author(s): 池田廉,大澤和敏,中井香緒里,平井英明
  • Organizer: 平成23年度農業農村工学会大会講演会
  • Place of Presentation: 九州大学箱崎キャンパス
  • Year and Date: 2011-09-07
• [Presentation] 閉鎖型汎用化水田構造を有した転換畑地における温室効果ガスの削減効果 (2011)
  • Author(s): 長谷川晃彦,石川雅也,梶原晶彦,飯田俊彰
  • Organizer: 平成23年度農業農村工学会大会講演会
  • Place of Presentation: 九州大学箱崎キャンパス
  • Year and Date: 2011-09-07