LONG-TERM SIMULATION OF AMBIENT GROUNDWATER CHEMISTRY AT HORONOBE UNDERGROUND RESEARCH LABORATORY, JAPAN —APPLICATION OF COUPLED HYDRO-GEOCHEMICAL MODEL

摘要：

A coupled hydrogeochemical simulation was performed to evaluate ambient chemical conditions around the Horonobe URL site. Hydrogeochemical investigations in 8 deep boreholes have suggested that groundwater chemistry around the URL has been formed through the mixing of shallow fresh water and deep saline water. The simulation of groundwater chemistry during the intrusion of fresh water from land surface into deep saline water in the past 500 ka was performed. The results suggest that: 1) the spatial patterns of salinity and major constituents observed around the URL are generally consistent with a scenario of the intrusion of surface fresh water into deep saline water; 2) freshening of deep saline water increases pH by cation exchange; 3) redox front migrates as oxidized water infiltrates from the surface but is strongly buffered by reducing minerals such as pyrite.

作者: Hajime Yamamoto Takanori Kunimaru Hiroshi Kurikami Michito Shimo Tianfu Xu

作者单位: Taisei Corporation, Technology Center Japan Atomic Energy Agency Lawrence Berkeley National Laboratory

会议类型: 国际会议

会议名称: 第二届国际应力-水流-热-化学耦合学术大会(2nd International Conference on Coupled Thermo-Hydro-Mechanical Processes in Geosystems and Engineering：Geoproc2006)

会议地点: 南京

会议语种:英文

页码: 343-348

在线出版日期: 2006-05-22（万方平台首次上网日期，不代表论文的发表时间）