Development to reduction of heat island phenomenon by measuring real large tree transpiration rate by lysimeter method

2014 Fiscal Year Final Research Report

• Project/Area Number: 24580062
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Horticulture/Landscape architecture
• Research Institution: Organization for Landscape and Urban Green Infrastructure
• Principal Investigator: TESHIROGI JUN 公益財団法人都市緑化機構, 都市緑化技術研究所, 主任研究員 (70537026)
• Co-Investigator(Renkei-kenkyūsha): KOSHIMIZU Hajime 明治大学, 農学部, 教授 (60012019)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ヒートアイランド対策 / 蒸発散量 / 蒸散量 / 都市緑化樹木 / 実測 / ライシメーター法 / ポロメーター / ケヤキ

Outline of Final Research Achievements

Urban forestry plays a major role in the mitigation of hot urban environments. This research has developed a new type of weight scale able to measure the amount of evapotranspiration from a large, full-sized tree (maximum weighing capacity 3t, measurement precision 100g), and is using the large-sized scale to carry out long-term measurements comparing the evapotranspiration of individual trees and those located in forests.
Measurements of the individual Zelkova serrata tree specimen in a temperate region of Japan during the summer season showed a maximum evapotranspiration of 44.6kg within a 12-hour daytime period. The trend of transpiration rate through the year has been shown ,and the study compares the data with the previous data were further considered for the cause of the low value. Furthermore, we measured transpiration by Lysimeter (L) and Porometer (P) in 12 hours of daytime in mid-summer.

Free Research Field

環境農学（含ランドスケープ科学） ，都市緑化樹木，緑地評価