bureau of waterworks tokyo metropolitan government … of water leakage prevention in tokyo leakage...
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Bureau of Waterworks Tokyo Metropolitan Government
2009
1Tokyo Metropolitan Waterworks Bureau
Copyright 2009 Bureau of Waterworks,Tokyo Metropolitan Government.
All Rights Reserved.
1. Overview of water services in Tokyo 2. Efficient usage of water by leakage
prevention3. Achievement of the C40 Tokyo
Conference on Climate Changes - Current efforts on the joint actions -
2Tokyo Metropolitan Waterworks Bureau
Tokyo Metropolitan Waterworks Bureau
Population served (in thousands ) 12,494
Total length of water main and distribution pipes (km) 25,652
Ave. distribution amount per day (in thousands ㎥) 4,390
(Actual in 2007)
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TokyoJAPAN
Tokyo
4Tokyo Metropolitan Waterworks Bureau
Water resources
Water leakage preventionWater leakage prevention
Measures to climate changesMeasures to climate changes
Energy CO2Finance
Tokyo Metropolitan Waterworks Bureau 5
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(%)
Leakage rate (%)• Effective use of water, approx. 340 mil.
m3/year (equivalent to the amount of water distributed to a city of 2.5 mil. People)
• Energy saving, approx. 170 thousand kW hour/ year (equivalent to energy used by approx. 50,000 households)
• Reduction of CO2 emissions, approx. 68,000 ton/year
• Effective use of water, approx. 340 mil. m3/year (equivalent to the amount of water distributed to a city of 2.5 mil. People)
• Energy saving, approx. 170 thousand kW hour/ year (equivalent to energy used by approx. 50,000 households)
• Reduction of CO2 emissions, approx. 68,000 ton/year
Effects of leakage preventionEffects of leakage prevention
In 1955Leakage rate
20%In 2007
Leakage rate 3.3%
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Ensuring high level technologies
Leakage detection technology / repairs of leakage in early
stages
Replacing water pipes /
improving pipe materials
Measures of water leakage prevention in TokyoMeasures of water leakage prevention in Tokyo
Leakage rate3.3%(2007)
Improvement of water pipe materials (implementation of ductile cast-iron pipes)
Midnight leakage detection Training of plumbing
technology
Tokyo Metropolitan Waterworks Bureau 7
Planned replacement of water pipesPlanned replacement of water pipes(replacement of aging distribution pipes with ductile cast(replacement of aging distribution pipes with ductile cast--iron iron pipes)pipes)Aging distribution pipes Ductile cast-iron pipes
Replacement Approx. 180
km/year
Transition of the ratio of ductile cast-iron pipes and leakages(distribution pipes)
0
100
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400
500
600
700
800
900
1000
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Ratio of ductile cast-iron pipes
Rat
io o
f ductile
cas
t-iron p
ipes
(%) Number of
leakages in the distribution pipes
Num
ber o
f leakage
s in
the d
istributio
n p
ipes
Tokyo Metropolitan Waterworks Bureau 8
Lead service pipes
Improvement of pipe materialsImprovement of pipe materials(replacement of service pipes to stainless steel pipes(replacement of service pipes to stainless steel pipes))
Stainless steel pipes
公 道 部 私 有 地Public roadPublic road Private propertyPrivate property
Service pipesDistribution pipes
Water meter
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Research, identify, and repair subsurface leakage
Subsurface leakage prevention
Prompt repairs of leakageoperates 24 hours
Leakage prevention on the ground
Aging pipes φ500mm
Water leakage detection technique and prompt repairs of Water leakage detection technique and prompt repairs of leakageleakage
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correlative leak detector
Helium gas leak detectorPipe inspect robot
Ensuring a high standard of technologyEnsuring a high standard of technology
Leakage detection technologyLeakage detection technologyDevelopment of correlative leak detector and helium gas leak detector etc.
Leakage prevention technologyLeakage prevention technologyDevelopment of a robot to inspect the pipes
Tokyo Metropolitan Waterworks Bureau 11
““Promotion of water leakage prevention and Promotion of water leakage prevention and provision of technical informationprovision of technical information””
Joint ActionsJoint ActionsJoint Actions
1 education of water leakage reduction1 education of water leakage reduction2 sharing of leakage prevention technology2 sharing of leakage prevention technology
Save the water , Save the earthSave the water , Save the earth
Achievement of C40 Tokyo Conference on Climate ChangeAchievement of C40 Tokyo Conference on Climate Change
Participating CitiesParticipating Cities・・Addis AbabaAddis Ababa・・ChicagoChicago・・Hong KongHong Kong・・JohannesburgJohannesburg・・Los AngelesLos Angeles・・Mexico CityMexico City・・New YorkNew York・・Sao PauloSao Paulo・・SeoulSeoul・・TokyoTokyo・・TorontoToronto・・WarsawWarsaw
Tokyo Metropolitan Waterworks Bureau 12
Joint action posterJoint action poster
World Water Forum, Tokyo boothWorld Water Forum, Tokyo booth
Current efforts of the joint actionsCurrent efforts of the joint actions
created and distributed posters created and distributed posters to the participating citiesto the participating cities
Participated in the 5th World Water Forum
(Istanbul, Turkey, March 16-22, 2009)
13Tokyo Metropolitan Waterworks Bureau
Let’s join us!
Thank you for your attention.Thank you for your attention.
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