Tokyo Waterworks Fundamental Facilities Renewal Project · Tokyo Waterworks Fundamental Facilities Renewal Project” summarizing a direction, eﬀects and speciﬁc measures for

（Outline）

March, 2016

Tokyo Waterworks

Fundamental Facilities

Renewal Project

-To Support Citizens’ Lives and Urban Activities in the Capital City, Tokyo into the Future-

Revised edition

Bureau of Waterworks, Tokyo Metropolitan Government

2nd Asaka water take tunnel (tentative)2nd Misono conveyance pipes (tentative)

Conveyance pipes related to Joryubu WPP (tentative)

Misato WPPJoryubu WPP (tentative)

Kanamachi WPPOzaku WPP

Transmission pipes related to Ariake water supply station2nd Asaka-Kamiigusa line (tentative)

Transmission pipes related to Joryubu WPP (tentative)

Tama hokubu water supply station (tentative)

Oji water supply station (tentative)

Kamikitazawa water supply station (tentative)Yoyogi water supply station (tentative)

Komazawa water supply stationWater supply stations, etc. in Tama Area


Water conveyance facility Water purification plant

Transmission pipes Water supply station

･･･Water purification plant which is closed

･･･Area which could suffer from water failure/muddy water

【Legend】

･･･Water purification plant･･･Water supply station･･･Pipeline which is closed･･･Area which could suffer from water failure/muddy water

【Legend】

･･･Water purification plant with a failed water distributing function

･･･Water supply station which is closed･･･Areas which could suffer from water failure/muddy water

【Legend】

○Water purification plants in a very advanced stage of decrepitude(Higashimurayama WPP and Kanamachi WPP)

○Pipelines which cannot be closed (Pipelines which are difficult to be backed up), (Asaka Higashimurayama Line and Asaka Kamiigusa Line)

○Water supply stations, etc. which supply water to extensive water distributing areas (Okura Water Supply Stations, Wadabori Water Supply station, and Kanamachi WPP)

※The population impacted with water supply is calculated based on the population served by Tokyo Waterworks (as of October, 2014), and the facility capacity in the purification plants and the planned water delivery from water supply stations.

Water supply is an indispensable and important lifeline to support citizens’ lives and urban activities in the capital city, Tokyo, and the stable water supply is sustained by innumerable water supply facilities (water

supply system). In particular, water conveyance facilities which convey raw water from rivers, etc., to water purification plants(WPPs), WPPs which produce tap water, transmission pipes which pump water from

WPPs, and water supply stations which capture tap water temporarily and distribute tap water steadily are the fundamental facilities forming the framework of the water supply system.

Among the fundamental facilities, some are aging decrepit, some are supplying tap water to quite extensive areas on their own, and some cannot be closed down since backup functions are not secured. Amidst the

possible various risks of a disaster including an earthquake, etc., and the occurrence of an accident, if the function of the fundamental facilities is stopped, the resulthing water failure could have far-reachimg bad

Tokyo Waterworks Fundamental Facilities Renewal Project” summarizing a direction, effects and specific measures for the construction of the fundamental

facilities to be conducted intensively over the next decade, under which we are steadily proceeding with the construction. Since what is required now is to strengthen risk management to respond to a volcanic

eruption, terrorism and other crises, we have decided to enhance our approaches to WPPs and water supply st tions.

o f a f u n c t i o n f a i l u r e i n t h e f u n d a m e n t a l f a c i l i t i e s (Image)

Higashimurayama WPP Closed

Asaka Higashimurayama Line Closed Asaka Kamiigusa Line Closed

Kanamachi WPP Closed

Kanamachi Water Purification Plant: water ddistributing function failed

Okura /Wadabori Water Supply Stations 　 Closed

To Support Citizens’ Lives and Urban Activities in the Capital City of Tokyo into the Future

The population affected with water supplyAbout 2.4 million people








The population affected with water supplyAbout 1 million people

The population affected with water supplyAbout 1 million people



　Water supply is an indispensable and important lifeline to support citizens’ lives and urban activities in the apital city, Tokyo, and the stable water supply is sustained by innumerable water supply facilities (water

supply system). In particular, water conveyance facilities which convey raw water from rivers, etc., to water purification plants(WPPs), WPPs which produce tap water, transmission pipes which pump water from

WPPs, and water supply stations which capture tap water temporarily and distribute tap water steadily are the fundamental facilities forming the framework of the water supply system.

Among the fundamental facilities, some are aging decrepit, some are supplying tap water to quite extensive reas on their own, and some cannot be closed down since backup functions are not secured. Amidst the

possible various risks of a disaster including an earthquake, etc., and the occurrence of an accident, if the fu ction of the fundamental facilities is stopped, the resulthing water failure could have far-reaching bad

consequence. For this reason, we have formulated the “Tokyo Waterworks Fundamental Facilities Renewal Projec

facilities to be conducted intensively over the next decade, under which we are steadily proceeding with th construction. Since what is required now is to strengthen risk management to respond to a volcanic

eruption, terrorism and other crises, we have decided to enhance our approaches to WPPs and water supply stations.

Water conveyance facility

Water Purification plant

Fundamental facilities

Transmission pipe

Water supply station

Issues we face now

I s s u e s w e f a c e n o w a n d e x a m p l e s o f t h e i m p a c t o f a f u n c t i o n f a i l u r e i n t h e c o r e f a c i l i t i e s

To Support Citizens’ Lives and Urban Activities in the Capital City of Tokyo into the Future

Aging Extensive water distributing area(s) Facilities which cannot be closed

Disaster such as an Earthquake Accident(s)

a function failure

Occurrence of wide-range water failure/muddy waterSerious impact on citizens’ lives and urban activities

Situation of an emergency water supplyat an evacuation center

(Great Hanshin-Awaji Earthquake)

(Photos courtesy of the Ministry of Defense) Situation of a bathing service by the Self-Defense Forces

(Great East Japan Earthquake)

＜Development of water conveyance facilities( Image)＞

【Direction of the development】○Water conveyance facilities will be duplicated to ensure a backup

function not only in case of a disaster such as an earthquake or an

accident, but also during construction for renewal, etc.

○Along with the development of alternative water purification facilities and the renewal of water purification plants (WPPs), water conveyance

facilities will also duplicated.

【Direction of the development】○We will construct alternative water purification facilities at other WPP site,etc in

advance to supplement the declining capacity at the time of renewal and then

advance the renewal of WPP.

○ Along with the development of alternative water purification facilities and the

renewal of WPPs, basically, all ponded structures which will be developed will be

covered with building structure in preparation for a ash fall caused by a volcanic

eruption and terrorism, etc.

＜Development of water purification plants(Image)＞

【Measures over the next decade】【Development process】


※ The numbers in the figure show the population who can accept more stable water supply as a result of the development of facilities. ※ The schedule will be aligned with the development schedule for Joryubu WPP (tentative).

※ The numbers in the figure show the population who can accept more stable water supply as a result of the development of facilities.

※１ Covering construction will start in FY 2017.※２ Covering construction will start in FY 2019.※３ Site inspection and securement are included.

Investigation /design　 Construction

ConstructionInvestigation /design　

＜Effects of measures and development over the next decade(Image)＞


H27 H28 H29 H30 H31 H32 H33 H34 H35 H36 H37

　2nd Asaka Higashimurayama Line （tentative）《Bore：2,000mm　Pipe length : about16km》

　2nd Asaka water intake tunnel

　2nd Misono conveyance pipes

　Higashimurayama Sakai Line《Bore：2,600mm　Pipe length : about 11km》

　Conveyance pipes related to Joryubu WPP

6

4 5

32

1

5

4

3

2

1

2（Effect of ）

Akigase Intake Weir

Sakai

Arakawa River

Misono

Misato

Kanamachi

Murayama Yamaguchi Reservoir

Higashimurayama

Joryubu (tentative name)

Ogouchi Reservoir

Ozaku

Asaka

Hamura Intake Weir

Ozaku Intake Weir

･･･Water purification plant･･･Alternative water purification facility

･･･Water conveyance facility･･･Water conveyance facility for which backup functions should be secured

･･･Water conveyance facility which will be developed

･･･Area which can accept more stable water supply

【Legend】

･･･Water purification plant･･･water purification plant which

will be renewed

･･･Alternative purification facility･･･Area which can accept more stable water supply

【Legend】

5

4

3

2

1

※３

H27 H28 H29 H30 H31 H32 H33 H34 H35 H36 H37

　Renewal of Sakai WPP ※１

　（Alternative plant for Higashimurayama WPP renewal）《Facility capacity of 700 thousand m3 per day 》

　Buildup of Misato WPP ※２

　（Alternative plant for Kanamachi WPP Renewal）《Facility capacity of 1.6 million m3 per day 》

　Development of Joryubu WPP (tentative)

　(Alternative plant for Ozaku WPP renewal)

　Renewal of Higashimurayama WPP

　Renewal of Ozaku WPP

　Renewal of Kanamachi WPP

6

4

5

3

2

1

※

An alternative water purification facility is under development　


Water conveyance facility Water Purification plant Transmission pipe

Renewal underway　


Water conveyance facility Water purification plant Transmission pipe

Covering

Water conveyance facility Water purification plant Transmission pipe Water supply station

Duplexing of water conveyance facilities

※ The population who will accept water more stable water supply is calculated based on the population served by the Tokyo Waterworks (as of October, 2014), and the facility capacity of WPPs and the planned water distibution amount.

About 0.5 million peopleAbout 0.5 million peopleAbout 1.7 million peopleAbout 1.7 million people

About 1.4 million peopleAbout 1.4 million people



①　Preparation for the renewal (preparing for the renewal, an alternative water purification facility will be constructed)

②　Start the renewal (renewal will take place after the alternative water purification facility is completed.)

Ogouchi Reservoir


Ozaku

Asaka

Akigase Intake Weir

Arakawa River

Misato

Misono Kanamachi

Sakai

Higashimurayama

Ozaku Intake Weir

Hamura Intake Weir


About 3million peopleAbout 3million people


Measures over the next decade

D e v e l o p m e n t o f w a t e r c o n v e y a n c e f a c i l i t i e s

（tentative）

（tentative）

（tentative）

（tentative）

D e v e l o p m e n t o f w a t e r p u r i fi c a t i o n p l a n t s

【Direction of the development】

○We will seek to establish a wide-range transmission pipe network and divide the

water transmission to a water supply station into two lines as well as to

adequately secure backup functions not only at the time of a disaster such as an

earthquake and an accident but also during construction works for renewal, etc.

○We will advance the development of transmission pipes from an alternative

water purification facility in preparation for a renewal of a WPP.

【Direction of the development]】○In order to quickly improve the stability of water supply, we will restructure the

water distributing area to an appropriate size through improvement of new

water supply station and expansion by renewing decrepit facilities.

○The reservoir capacity in water supply stations will be improved to aim to

supply water for 12 hours of the planned maximum water distribution amount

per day to respond to hourly variation in water usage and in case of

emergency such as an accident.

D e v e l o p m e n t o f t r a n s m i s s i o n p i p e s

D e v e l o p m e n t o f w a t e r s u p p l y s t a t i o n s



※The numbers in the figure show the population who can accept more stable water supply as a result of the development of facilities. ※The schedule will be aligned with the development schedule for Joryubu WPP (tentative).

※ The numbers in the figure show the population who can accept more stable water supply as a result of the development of facilities.



※

4

5

3

2

1

Ogouchi Reservoir

･･･Water purification plant

･･･Water supply station, etc.･･･Transmission pipes･･･Water supply station etc. which will be developed


【Legend】

4

5

3 6

1

8

7

H27 H28 H29 H30 H31 H32 H33 H34 H35 H36 H37

　Tama Nanboku main (tentative)

《Bore：2,000mm　Pipe length: about 16km》

　Transmission pipes related to Ariake Water Supply Station《Bore：1,200mm　Pipe length: about ２km》

　2nd Asaka-Kamiigusa main (tentative)《Bore：2,600mm　Pipe length: about13km》

　Transmission pipes related to Sakai WPP《Bore：2,000mm　Pipe length: about９km》

　Transmission pipes related to Purification Joryubu WPP(tentative)

H27 H28 H29 H30 H31 H32 H33 H34 H35 H36 H37

　Kohoku water supply station (tentative)

《Reservoir capacity　about 50 thousand m3 》

　Oji water supply station (tentative)

《 Reservoir capacity about 50 thousand m3 》

　Kamikitazawa water supply station (tentative)

《Reservoir capacity about 40 thousand m3 》

Yoyogi water supply station (tentative)《Reservoir capacity about 40 thousand m3》

　Tamahokubu water supply station (tentative)

《Reservoir capacity about 30thousand m3 》

　Wadabori water supply station 《Reservoir capacity about 110 thousand m3》

　Komazawa water supply station《Reservoir capacity about 20 thousand m3》

　Water supply stations, etc. in Tama Area

4

5

3

6

2

1

8

7

4

5

3

2

1

･･･Water purification plant

･･･Alternative water purification facility

･･･Water supply station, etc.

･･･Transmission pipes

･･･Transmission pipes for which backup　　 functions should be secured.

･･･Transmission pipes which will be developed


【Legend】

Water purification plant Transmission pipe Water supply station

Duplexing of transmission pipes

Networking of transmission pipes


Water purification plant Transmission pipes


New construction/expansion of water supply stations


Restructure the water distributing area to an appropriate size

＜Development of transmission pipes(Image)＞

＜Development of water supply stations (Image)＞

Measures over the next decade [FY 2016 to FY 2025]


Ozaku

Ozaku Intake WeirHamura Intake Weir

AsakaMisato

Kanamachi

Akigase Intake Weir

Arakawa River

Sakai

Higashimurayama

About 0.25million peopleAbout 0.25million people

About 0.0３million peopleAbout 0.0３million people

About ２．２million peopleAbout ２．２million people

About０．８million peopleAbout０．８million peopleAbout １．７million peopleAbout １．７million people

Investigation /design　　　 Construction

Investigation /design　　　　Construction

Ogouchi Reservoir

Ozaku


Akigase Intake Weir

Asaka

Misato

Arakawa River

Kanamachi

Sakai

Higashimurayama About １million peopleAbout １million people

About １．４million peopleAbout １．４million people

About 0.15million peopleAbout 0.15million peopleMisono

Misono

In sequenceIn sequence

For more information please visit our website. http://www.waterworks.metro.tokyo.jp/

O v e r v i e w o f t h e F u n d a m e n t a l F a c i l i t i e s R e n e w a l P r o j e c t o v e r t h e n e x t d e c a d e

Water conveyance facility Transmission pipes

5

4

32

1

4

5

3

2

1

6 4 5

3

2

4

5

3 6

21

8

7

Akigase Intake Weir

Tone Large WeirTonegawa River

Arakawa River

Murayama ・Yamaguchi Reservoir


Higashimurayama

Sakai

Joryubu (tentative name)Ogouchi Reservoir

Ozaku

Asaka Misono

Misato

Kanamachi

1

Water purification plant Water supply station

Water purification pkant which will be renewed

Alternative water purification facility

Water conveyance facility and transmission pipe which will be developed

Water supply station etc. which will be developed

Duplication

2

3

1 2nd Asaka-Higashimurayama line (tentative)

Development of alternative water purification facilities and covering

2

3

1 Sakai WPP

Duplication/network establishment

2

3

1 Tama Nanboku main (tentative)

New construction

2

3

4

5

1 Kohoku water supply station (tentative)

Development related to alternative purification facilities

4

5

Higashimurayam Sakai line (tentative)

Renewal and covering ofwater purification facilities

4

5

6

Higashimurayama WPP

Development related to alternative water purification facilities development

4

5

Transmission pipes related to Sakai WPP

Expansion

7

8

6 Wadabori water supply station

2nd Asaka water take tunnel (tentative)2nd Misono conveyance pipes (tentative)

Conveyance pipes related to Joryubu WPP (tentative)

Misato WPPJoryubu WPP (tentative)

Kanamachi WPPOzaku WPP

Transmission pipes related to Ariake water supply station2nd Asaka-Kamiigusa line (tentative)

Transmission pipes related to Joryubu WPP (tentative)

Tama hokubu water supply station (tentative)

Oji water supply station (tentative)

Kamikitazawa water supply station (tentative)Yoyogi water supply station (tentative)

Komazawa water supply stationWater supply stations, etc. in Tama Area


Water conveyance facility Water purification plant

Transmission pipes Water supply station

Documents

Tokyo Waterworks Fundamental Facilities Renewal Project · Tokyo Waterworks Fundamental Facilities Renewal Project” summarizing a direction, eﬀects and speciﬁc measures for