Feasible proposition of a shallow land waste repository constructed by using a capillary barrier of soil to isolate a hazardous waste material or a very low level radioactive waste.

2015 Fiscal Year Final Research Report

• Project/Area Number: 25252043
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Rural environmental engineering/Planning
• Research Institution: Niigata University
• Principal Investigator: Morii Toshihiro 新潟大学, 自然科学系, 教授 (30231640)
• Co-Investigator(Kenkyū-buntansha): KOBAYASHI Kaoru 茨城大学, 工学部, 教授 (80443638) ; TAKESHITA Yuji 岡山大学, 環境生命科学研究科, 教授 (90188178) ; KATO Shoji 神戸大学, 工学部, 准教授 (10204471) ; FUJIMAKI Haruyuki 鳥取大学, 乾燥地研究センター, 教授 (90323253) ; KAWAI Takayuki 新潟大学, 災害・復興科学研究所, 特任助教 (20437536)
• Research Collaborator: INOUE Mitsuhiro 鳥取大学, 名誉教授
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 土のキャピラリーバリア / 廃棄物貯蔵・保管工法 / 試験盛土 / 限界長 / 遮水・排水機能 / 土の不飽和水分特性

Outline of Final Research Achievements

Capillary barrier (CB) is a sloping soil layer system which is composed of sand layer underlain by gravel layer, and can divert water infiltrating from the soil surface. A shallow land waste repository, in which upper CB and bottom CB were placed to divert infiltration due to rainfall and to drain water percolating through the protected waste material respectively, is proposed to isolate a hazardous waste material or a very low level radioactive waste. In the study a test shallow land waste repository was constructed to investigate the CB’s performance in the field. Diversion length of the CB was determined based on the laboratory soil box test to determine the structural dimensions of the shallow land. Then soil moisture contents within the shallow land were measured. They showed an excellent and stable water diversion of the CB in the field.

Free Research Field

農業工学，地盤工学