Mechanism of acid-neutralization in two Japanese watersheds

✍ Scribed by Hideshi Ikeda; Yoichi Miyanaga

• Book ID: 104782494
• Publisher: Springer Netherlands
• Year: 1995
• Tongue: English
• Weight: 401 KB
• Volume: 85
• Category: Article
• ISSN: 0049-6979
• DOI: 10.1007/bf00477252

✦ Synopsis

In Japan, acidification of terrestrial water has not yet been reported except lakes acidified by volcano or mine. However, acid dep~sition in Japan is as much as those in northern Europe and north-eastern U.S.A., and acidification of terrestrial water may occur in future. In order to predict long-term acidification, it is necessary to understand acid-neutralization mechanism in watershed. Therelk~re, two experimental watersheds study ligr geology, hydrology, and water chemistry were conducted. On the basis of these data, chemical change in percolation of precipitation through watersheds and acid-neutralization mechanism are analyzed. The principal results are : (1) Acid deposition is neutralized continuously in percolation of precipitation lu ground-surface to aquifer, (2) Chemical weathering of primary minerals plays an important role in the acidneutralization in the watersheds, and should be quantified mad taken into account in the long-term prediction of acidification.