-. J. Hot Spring Sci. /2 ,0+ῌ,1, ,**3ῌ῍῍ῑ῏ῌ῎ΐῐῒ
/0123+ 4 5, 67 8,
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  ,*  +,3

Tales of the Past and Present of Hot Springs
in Ibaraki Prefecture
Yasuo KANROJI+, Tadashi TOBITA, and Yuu HORIKAWA,

Abstract
According to the statistics of the Ministry of the Environment in ,**1, there are +-2
mineral spring wells in Ibaraki Prefecture, +*, of which are used, and about ,1ῌ of thembelong to the type of spontaneously ﬂowing wells. Total discharge rate of thermal water
comes up to about ,*,*** l/min. and about /2ῌ of them are pumped up from underground. The majority of the wells are of lower temperature below ,/,.
In this paper, the following subjects related to the past and present tales of springs in
Ibaraki Prefecture are mainly mentioned.
(+) The distribution and chemical characteristics of spring wells (+220-,**2).
(,) Book review of Hana NAKAMURA’s Writing “Mineral Springs in Ibaraki Prefecture”, in which many spas people believed to have curative power from old times arecommented.
(-) The pipe line for supplying of thermal water to facilities in Daigo Spa situated innorthern district of the Prefecture.
(.) The changes of spring resources and utilization states (by the analyses ofstatistics of the Ministry of the Environment).
Deep drilling wells above +,*** m depth have rapidly increased in recent years. andsome of them in the northern district of the Prefecture are characterized by hightemperature above /*, (the maximum temperature is 10.2,). Some of the spring wells
are utilized in public baths for day trippers.
Key words : Hot Springs, Ibaraki Prefecture, Tales of the Past and Present+ +1+ῌ**--  -ῌ.,ῌ+*. + Hot Spring Research Center, Takada -ῌ.,ῌ+*, Toshima-ku, Tokyo +1+ῌ**--, Japan.
, !"#$ -++ῌ.+.- %&'()*+ +222. , Ibaraki Onsen Kaihatsu Co. Ltd.,
Otsuka-machi +222, Mito, Ibaraki -++ῌ.+.-, Japan.

261

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266

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by Hana NAKAMURA (Commune names are old ones) , 

 

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 >4" ?@5 <=  >  4  A67 A B C8 D  E F 9G C8 :  ;  H<I * J ?= 4 C8K L  M, M,
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 PR BA S  T
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YZy_zvil`u {ph|zil`i P} "{?ik[d`xeZnpS/! "#

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2-4.,
K mg/kg-4*m4 val῍*4/,
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Mg mg/kg,4/m4 val῍+4.+
Cl mg/kg+..4*m4 val῍,14-3
SO. mg/kg.224*
m4 val῍
024/,
HCO- mg/kg-14*
m4 val῍.4*3
H, SiO- mgῌkg+*4.
HBO, mgῌkg/*4/
Total mgῌkg
+5*.0
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Fig. . Pipe lines of Daigo hot spring in the present.
 .    + ῌῌ  , ῌ!" #$%&$'()*+,- / km ./0 ,*-* !"
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BGGc8@d 34efTg,9[hi!jBG]klmdO

269

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Summary of the annual changes in hot spring resources and utilization states in Ibaraki Prefecture . 
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