1. Strategy for Waterworks Facilities Development in Tama Area
Water Management Training Program 2016
SHRDC, Korea
Strategy for Waterworks Facilities Development in Tama Area
YUKI HONDA
Bureau of Waterworks, Tokyo Metropolitan Government, JAPAN

2. Contents １ Overview of Tama Waterworks
　２　Tama Waterworks Reformation Strategy
- Development of Water Transmission Network
- Rezoning of Water Distribution Areas
- Improvement of Disaster Preparedness Plan
３　Summary

3. Overview of Tama Waterworks
TAMA area
As of Mar. 2016
Central Tokyo
Item
TOKYO
TAMA
Central
Customers （1,000 people）
13,173
3,900
9,273
Supply area (km2)
1,239
612
627
Total length of distribution pipes (km)
26,915
10,369
16,546
Average amount of water supply（1,000m3/day）
4,181
1,142
3,039　
Purification plants 81 70 11
PP’s Capacity（1,000m3/day)
---
0.04 – 32
15 –
1,700
Tokyo

4. Tama Waterworks Reformation Strategy
Formulated in 2013
Background
１．Pipeline network was developed insufficiently.
　２．Aging facilities. Constructed in the 1950s and 60s.
　３．Water supply easily cuts off when disasters strike.
Steps
Developing water transmission network
Rezoning water distribution areas
Improving disaster preparedness plan

5. Development of Water Transmission Network
Hijirigaoka SS
Higashimurayama PP
Ozaku PP
Haijima SS
Narahara SS
Yarimizuoyama SS
Higashiyamato SS
Tama north-south transmission main
Diameter　2000mm
Length 　16km
now under construction
Tama hills transmission main
Diameter　1500mm
Length 　32km
Finished in 2015
： Purification Plant
： Water Supply Station
： Pumping Station
： Transmission Pipe
　（existing)
Goal
Improve reliability of water supply even in emergencies
Replace aging pipes without disruption of water supply

6. Utilization of gravity flow
Rezoning of Water Distribution Areas P
A city
B city
D city
C town
Each city supplied water in its district only.
Rezoning makes water supply more efficient. Ｐ
C town
A city
B city
D city P
Utilization of gravity flow P
Water Supply Station
Distribution Pump
Gravity Flow
Pressured flow
Integration of facilities
Interchange of water supply
Goal
Provide tap water anytime by interchange of water supply
Improve facility management by integration of facilities
Save energy by taking advantage of gravity flow

7. Telemeter for water quality
Improvement of Disaster Preparedness Plan
Planned disruption of power supply in 2011 made it difficult/impossible to
- Provide tap water by distribution pumps
- Collect data for water supply from telemeters
Water stoppage
more than
260,000 households
Batteries
Telemeter for water quality
Goal
Emergency generators are being installed at the facilities.
Storage batteries are being mounted on the telemeters.
Facilities are being renovated to make them earthquake resistant.

8. Summary To overcome unique challenges in Tama
Developing water transmission network
Rezoning water distribution areas
Improving disaster preparedness plan
We will supply tap water in a stable and sustainable manner with the advantage of
regional waterworks along with a disaster management plan now and in the future!!

9. Thank you for your attention
Mizutama-chan
(Polkadot)
Suiteki-kun
(Drop)