Intensive monitoring of liquid, vapor, heat, and solute transport in a soil under nonisothermal conditions

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K14820
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Rural environmental engineering/Planning
• Research Institution: Mie University
• Principal Investigator: Toride Nobuo 三重大学, 生物資源学研究科, 教授 (70212074)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 水ポテンシャル / 鏡面冷却式露天計 / 水分移動 / 溶質移動 / 熱移動 / 凍結融解 / モニタリング

Outline of Final Research Achievements

A micro-chilledmirror hygrometer, FINEDEW, was applied to monitor water potential in the dry range up to -300000 cm H20 in evaporating, freezing, and thawing soil columns. In the freezing and thawing processes, the observed potential reasonably agreed well with the calculated potential based on the Clausius-Clapeyron (CC) equation according to the measured temperature. The theoretical CC potential, however, had a tendency to underestimate the freezing observed potential when the freezing rate was relatively fast, indicating freezing had not yet reached the equilibrium state. We confirmed water potential monitoring using FINDEW is a promising technique to further investigate water flow with phase changes in a soil.

Free Research Field

土壌物理