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Acid Mine Drainage Sources and Impact on Groundwater at the Osarizawa Mine, Japan

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Title: Acid Mine Drainage Sources and Impact on Groundwater at the Osarizawa Mine, Japan
Authors: Nishimoto, Naoto Browse this author
Yamamoto, Yosuke Browse this author
Yamagata, Saburo Browse this author
Igarashi, Toshifumi Browse this author →KAKEN DB
Tomiyama, Shingo Browse this author
Keywords: abandoned and closed mine
acid mine drainage (AMD)
water quality
stable isotope ratio
Issue Date: Sep-2021
Publisher: MDPI
Journal Title: Minerals
Volume: 11
Issue: 9
Start Page: 998
Publisher DOI: 10.3390/min11090998
Abstract: Understanding the origin of acid mine drainage (AMD) in a closed mine and groundwater flow system around the mine aids in developing strategies for environmental protection and management. AMD has been continuously collected and neutralized at Osarizawa Mine, Akita Prefecture, Japan, since the mine was closed in the 1970s, to protect surrounding river water and groundwater quality. Thus, water samples were taken at the mine and surrounding groundwaters and rivers to characterize the chemical properties and environmental isotopes (delta H-2 and delta O-18). The results showed that the quality and stable isotope ratios of AMD differed from those of groundwater/river water, indicating that the recharge areas of AMD. The recharge area of AMD was evaluated as the mountain slope at an elevation of 400-500 m while that of the surrounding groundwater was evaluated at an elevation of 350-450 m, by considering the stable isotopes ratios. This indicates that the groundwater affected by AMD is limited to the vicinity of the mine and distributed around nearby rivers.
Rights: © 2021 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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