§1.1921 10 12 8 21

31 (M7.0)3

2 19231921

3

1921

* 113-0032 1-1-1: naka@eri.u-tokyo.ac.jp

§2.

40 km

(1653 )8

4km 1898 31

(1926) ” “” “ 1

1923 14 1937

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歴史地震 第33号(2018) 39-46頁 受付日 2017/12/04, 受理日　2018/03/13

[資料]1921 1923*

A Study on the water outage caused by the Tamagawa-Josui damages at the 1921 Ryugasaki earthquake and the 1923 Kanto earthquake and their restorations.

Ryoichi Nakamura

Earthquake Research Institute, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan

The Tamagawa-Josui had been the only waterway to supply clean water to Tokyo city for the Meiji and the Taisho era. A part of the Tamagawa-Josui was broken by the 1921 Ryugasaki earthquake that occurred in the southwest part of Ibaraki prefecture and caused water outage on Tokyo for three days. Two years later, this waterway suffered a stronger seismic motion and was further damaged by the 1923 Kanto earthquake, Three days later, the water supply began the road to recovery. Given the earthquake caused heavy damage, the time for recovery seems to be somewhat shorter than usual at that time. This is because a preliminary pump had been installed in response to the 1921 Ryugasaki earthquake and was used effectively for the 1923 Kanto earthquake. Keywords: Tamagawa-Josui, 1921 Ryugasaki Earthquake, 1923 Kanto Earthquake, Water supply.

4311965

§3.1921 1923

1921

19211881-1971

19232 1921

( 10 12 10 ) Fig. 2 The waterway damages of the new

channel by the 1921 Ryugasaki earthquake.

1Fig.1 Location of the old and new channels of the Tamagawa-Josui.

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3.1 1921(1966) 1921 12 8

57

245 2

(1921.12.10)

(1966)

○○

○

○ 33

4

Fig.4 The 1st tunnel under the new channel. 3

(192

6)

Fig.

3 Lo

catio

n of

dam

ages

on

the

new

chan

nel

by th

e 19

23 K

anto

ear

thqu

ake.

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3316

(1966)

11

15 4

3.21921

8

(1965)

1923

(1966)

(1923)

[ (2007)]

3.3 19231923

3 (1926)

4 3

( 4 )1921

1923

(1966)

9 139 3

9 1 3 (1953,1963

1

2

3

3 5

1 5 (1926)

-42-

§4.1921

1921 (2009)(1921)

(1922) (1922) (2003)

(1921)

(2007)0 1 2 3 4 5 6

19214

4(1922)

(1922)

9/19/39/49/49/6

9/6-9/99/139/1810/2

10/1010/1511/10

11926

Table 1 Electric transmission system and recovery date

51926

Fig.5 Transmission line and the Tabata substation.

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35.5

34 27 1/2

1/331 27

(2003)

2

45

1923

(2002) 19235

65

2 1921Table 2 Newspaper articles of the damage of the

Ryugasaki earthquake.

6 1923(2002)

Fig.6 Detailed seismic intensity distribution of the Kanto earthquake.

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6 5 6

19236 1921

51921 1923

119235 6 1921

4 5

§5. 1921

34 5

19211923

19211923

[ (1953)]

29

1921 1923

1921265 309-311.

1965 , 169 pp.2010

M 7-1921

,1922 1987-

84(2), 183-212.2007

　　て-震度データベースの遡及-，験震時報，70，29

-49．

2007 ,，12.1926

100 ( ) 215-233.1922

10 153-178. 1926

100 ( ) 251-287.1953 50

314 pp.

-45-

1963 :284 pp.2002 1923

2318 97-115.

1960114-122.

192312 5 288 pp.

1966324 pp.

2003416-2001 605 pp.

1922 12 841 4-13.

(1965)

2

　

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