NDLI: Comparison of Acid Neutralization by Chemical Weathering Between Acidified and Non-Acidified Watersheds

Content Provider	Springer Nature Link
Author	Ikeda, Hideshi Miyanaga, Yoichi
Copyright Year	2001
Abstract	In eastern Asia, emission of acid materials and acid depositionwill increase with industrialization in future, and freshwatersin Japan are likely to become acidified. In this article, anevaluation method for acid-neutralization by chemical weatheringwas applied to one acidified watershed in U.S.A. and three non-acidified watersheds in Japan, and effect of hydrogeochemicalproperties on chemical weathering and stream water chemistry wasdiscussed. In three non-acidified watersheds in Japan, arealchemical weathering rates of primary minerals are much largerthan those observed in U.S.A. Watersheds in both countries showno difference in mineralogy, while the soil thickness (weatheredprofile) in watersheds is contrastive between acidified and non-acidified watersheds. Therefore, it is concluded that acidity is neutralized by chemical weathering of primary minerals in thick weathered profiles in Japanese watershed. In non-acidified Japanese watersheds which has the smallest acid-neutralization capacity in three observed watersheds, stream water will not acidify even if the acid deposition increases asmuch as two or three times the observed level. From the viewpoint of Japan's nationwide streamwater chemistry, more than 90% of the watersheds have far greater acid-neutralization capacities than this watershed, and will not be acidified even in cases where the acid deposition increase as much as two or three fold.
Starting Page	407
Ending Page	436
Page Count	30
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	131
Issue Number	1-4
e-ISSN	15732932
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2001-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrogeology Atmospheric Protection/Air Quality Control/Air Pollution
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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