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ῒ ῎ ῐ ῏ ῌ ῍ ῑ   Hot Springs in Wakayama Prefecture, JapanMasatsugu NAKAMURAWakayama Prefectural Research Center of Environment and Public Health

Abstract
Using -/3 analytical results of hot spring waters of Wakayama Prefecture whichwere analyzed from January +301 to May ,**+ at the Wakayama Prefectural ResearchCenter of Environment and Pulblic Health, the author and co-workers studied regional
di#erences in characteristics of hot springs in Wakayama Prefecture. The authors
divided geographically and geologically the Wakayama Prefecture which is located in
the western part of the Kii Peninsula into three major areas ; northern (Kihoku), central(Kichuu), and southern area (Kinan). Kinan was further subdivided into two parts, thatis, western (Kinan-nishi) and eastern parts (Kinan-higashi). Most of the hot springs ofthe Na-Cl category were found in Kihoku, while Kichuu had many cold springs. AndNa-HCO- springs were located in Kinan-nishi. Simple-Iron-Sulfate springs were limited
to Kinan-higashi and comprised --ῌ of its hot springs. In addition, simple hot springs
were most densely distributed in this Kinan-higashi area.
Key words : Hot spring, Wakayama, Kii Peninsula, Sodium, Chloride, Bicarbonate,
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Table + Five Towns abundant inHot Spring Wells, Wakayama
Prefecture.
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Fig. -Classiﬁcation of Hot Springs according to Constituents and Their Distribution in Each Area.
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Relationship between Evaporation Residues and Bicarbonate Ions in Each Area.
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Fig. 1

Relationship between Evaporation Residues and Sodium Ions in Each Area.
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Relationship between Evaporation Residues and Chlorine Ions in Each Area.
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Relationship between Chlorine Ions and Sodium Ions in Each Area.
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