Dynamic analysis of the evaporation from forest floor taking consideration in the canopy structure

• Project/Area Number: 18580143
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: 林学・森林工学
• Research Institution: Nagoya University
• Principal Investigator: HATTORI Shigeaki Nagoya University, Graduate School of BioagriculturalSaences, Professor (30273212)
• Project Period (FY): 2006 – 2007
• Project Status: Completed (Fiscal Year 2007)
• Budget Amount: ¥3,730,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥330,000); Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2006: ¥2,300,000 (Direct Cost: ¥2,300,000)
• Keywords: evaporation from forest floor / canopy structure / micrometeorological factor / water balances / heat balance / litter layer / deciduous broad-leaved forest / 自動開閉式チャンバー

Research Abstract

The evaporation from forest floor has been observed for two years in a deciduous broad-leaved forest in Seto city, taking the thickness, of litter layer into consideration. The characteristics of the daily and seasonal changes of the evaporation from forest floor was analyzed considering the influences of micrometeorological factors, soil moisture of litter layer and canopy structure. As the results, the following findings were obtained.
1.The characteristics of daily and seasonal changes of evaporation from forest floor The daily evaporation was 0.42 mm in foliated season (May-October) and 0.29 mm in defoliated season (November-April) . These data were almost the same range of evaporation reported so far in various forests. The ratio of evaporation from forest floor in forest evapotranspiration from dry canopy was about 14% in foliated season and about 29% in defoliated season.
2.The response of evaporation from forest floor to micrometeorological condition The regression analysis was carried out to make clear the influence of micrometeorological factors on the evaporation from forest floor. We confirmed that the saturation vapor deficit correlated closer with the evaporation from forest floor than the other factors.
3.The influences of the litter layer on the evaporation from forest floor
The evaporation from forest floor with litter layer decreased comparing with the evaporation from bare soil surface ; litter layers with 1.5 cm thickness and 4 cm thickness decreased by about 5 % and by about 19% respectively. The limitation of evaporation from forest floor might be larger according to the thickness of litter layer.

Research Products

• [Journal Article] リター層水分が林床面蒸発量に及ぼす影響の熱収支的考察 (2007)
  • Author(s): 出口愛子・服部重昭・宮下茉莉・青木悠・大黒健一
  • Journal Title: 中部森林研究 54 Pages: 149-150
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Impact of wind direction on diurnal and seasonal changes in wind profiles. (2007)
  • Author(s): K., Daikoku, S., Hattori, A., Deguchi, Y., Fujita, H., Park, and K. Matsumoto
  • Journal Title: Journal of Forest Research 12 Pages: 452-466
  • NAID: 10027224896
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Study of heat balance for the influence of water content in litter layer on the evaporation from forest floor (2007)
  • Author(s): Aiko, Deguchi, Shigeaki, Hattori, Mari, Miyashita, Yu, Aoki, Kenichi, Daikoku
  • Journal Title: Chubu Forestry Research 55 Pages: 149-150
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Impact of wind direction on diurnal and seasonal changes in wind profiles. (2007)
  • Author(s): Kenichi, Daikoku, Shigeaki, Hattori, Aiko, Deguchi, Yuji, Fujita, Hotaek, Park, Kazuho, Matsumoto
  • Journal Title: Journal of Forest Research 12 Pages: 452-466
  • NAID: 10027224896
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 落葉広葉樹二次林における林床面蒸発の季節変化ならびに落葉層が及ぼす影響 (2007)
  • Author(s): 青木悠・服部重昭・出口愛子・大黒健一・宮下茉莉・松本一穂
  • Organizer: 第56回日本森林学会中部支部大会
  • Place of Presentation: 長野県
  • Year and Date: 2007-10-13
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Seasonal change of evapora-tion from forest floor and the effects on litter layer on evaporation in a deciduous broad-leaved secondary forest (2007)
  • Author(s): Yu, Aoki, Shigeaki, Hattori, Aiko, Deguchi, Kenichi, Daikoku, Mari, Miyashita, Kazuho, Matsumoto
  • Organizer: The 56th assembly of Chubu branch in the Japanese Forest Society
  • Place of Presentation: CNagano Prefrecture
  • Year and Date: 2007-10-13
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 落葉広葉樹二次林における林床面蒸発の季節変化 (2007)
  • Author(s): 青木悠・服部重昭・出口愛子・大黒健一・宮下茉莉・松本一穂
  • Organizer: 第118回日本森林学会大会
  • Place of Presentation: 福岡市
  • Year and Date: 2007-04-03
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Seasonal change of evapora-tion from forest floor in a deciduous broad-leaved secondary forest (2007)
  • Author(s): Yu, Aoki, Shigeaki, Hattori, Aiko, Deguchi, Kenichi, Daikoku, Mari, Miyashita, Kazuho, Matsumoto
  • Organizer: The 118th assembly of the Japanese Forest Society
  • Place of Presentation: Fukuoka City
  • Year and Date: 2007-04-03
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] 落葉広葉樹二次林における林床面蒸発の季節変化 (2006)
  • Author(s): 青木悠・服部重昭・出口愛子・大黒健一・宮下茉莉・松本一穂
  • Organizer: 第55回日本森林学会中部支部大会
  • Place of Presentation: 富山市
  • Year and Date: 2006-10-14
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] Seasonal change of evapora-tion from forest floor in a deciduous broad-leaved secondary forest (2006)
  • Author(s): Yu, Aoki, Shigeaki, Hattori, Aiko, Deguchi, Kenichi, Daikoku, Mari, Miyashita, Kazuho, Matsumoto
  • Organizer: The 55th assembly of Chubu branch in the Japanese Forest Society
  • Place of Presentation: Toyama City
  • Year and Date: 2006-10-14
  • Description: 「研究成果報告書概要(欧文)」より