2009 Fiscal Year Final Research Report

Development of the estimation method for evapotranspiration combined with soil water content in an apple orchard

Research Project

Project/Area Number	19580291
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Agricultural environmental engineering
Research Institution	Hirosaki University
Principal Investigator	ITO Daiyu Hirosaki University, 農学生命科学部, 准教授 (00333716)
Co-Investigator(Renkei-kenkyūsha)	ISHIDA Sachinobu 弘前大学, 大学院・理工学研究科, 助教 (60292140) MATSUSHIMA Dai 千葉工業大学, 工学部, 准教授 (50250668)
Project Period (FY)	2007 – 2009
Keywords	農業生産環境 / 蒸発散 / 土壌水分 / 微気象観測 / 水蒸気フラックス / 渦相関法
Research Abstract	Long-term micrometeorological and turbulent flux observations were made in an apple orchard, and daily evapotranspiration was determined using three different methods. The estimation methods for canopy heat storage and snowmelt latent heat were also proposed and introduced in the calculation process of the evapotranspiration. As a result, precise estimation of evapotranspiration based on the monthly crop coefficient has become possible, although the estimation of soil water content remained unsolved. Furthermore, estimation methods for solar radiation and evapotranspiration using satellite data were proposed, which will lead to the wide area estimation of evapotranspiration rate.