Effects of entrapped air on mass transport through surface critical zone under humid climate

2014 Fiscal Year Final Research Report

• Project/Area Number: 24380130
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Irrigation, drainage and rural engineering/Rural planning
• Research Institution: The University of Tokyo
• Principal Investigator: NISHIMURA Taku 東京大学, 農学生命科学研究科, 教授 (40237730)
• Co-Investigator(Kenkyū-buntansha): IMOTO Hiromi 東京大学, 大学院農学生命科学研究科, 技術職員 (40419255)
• Co-Investigator(Renkei-kenkyūsha): KATO Chihiro 弘前大学, 農学生命科学部, 助教 (60728616)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 封入空気 / 溶質移動 / イオン交換 / 吸着等温線 / 透水係数

Outline of Final Research Achievements

Mass and energy transport through soils is strongly affected degree of water saturation. Entrapped air in the soil may affect mass and energy transport even though the soil still seems to be water saturation. Decrease in water saturation for a few percentiles due to entrapped air bubbles may affect water flow through the soil. Considering these points of view we conducted following items, such as, to evaluate effect of entrapped air on hydraulic conductivity of quasi-saturated soils, to construct a monitoring system to grasp conditions of air phase in a partially saturated soil, to discuss reactive transport of ions and colloids through the soil and design and construct an experimental tool based on the concept of tension disk infiltrometer to study saturated and unsaturated water and solute transport in situ.

Free Research Field

環境地水学