A study on the mechanism of canopy interception using stable isotopes of water

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H04520
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Forest science
• Research Institution: Forest Research and Management Organization
• Principal Investigator: Murakami Shigeki 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 等 (80353879)
• Co-Investigator(Kenkyū-buntansha): 服部 祥平 東京工業大学, 物質理工学院, 助教 (70700152) ; 登尾 浩助 明治大学, 農学部, 専任教授 (60311544)
• Co-Investigator(Renkei-kenkyūsha): NANKO Kazuki 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 (40588951) ; ITOH Yuko 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 (60353588) ; NOBORIO Kosuke 明治大学, 農学部, 専任教授 (60311544)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 樹冠遮断 / 水安定同位体 / 飛沫蒸発

Outline of Final Research Achievements

Evaporation from forest canopy at the time of rainfall consists of surface evaporation and splash droplet evaporation. Generally, the ratio of stable isotope of water in net rainfall is larger than that in gross rainfall in a forest stand. The objective of this study is to clarify which evaporation is dominant using stable isotope of water.
The result obtained at a cedar stand showed that the ratio of stable isotope of water in gross rainfall is larger than that in net rainfall, and it meant the premise of this study is wrong. The same results were presented abroad; however, their understanding was not correct. We proved that the phenomenon can occur theoretically and succeeded to understand it. Though the initial objective was not achieved, the finding casts a new light on the subject: forest hydrology using stable isotope of water.

Free Research Field

森林水文学