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Learn about the Tama Waterworks Reformation Strategy in Tokyo, Japan. Explore the development of water transmission network, rezoning of water distribution areas, and improvement of disaster preparedness plan.
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Water Management Training Program 2016 SHRDC, Korea Strategy for Waterworks Facilities Development in Tama Area YUKI HONDA Bureau of Waterworks, Tokyo Metropolitan Government, JAPAN
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
Overview of Tama Waterworks TAMA area As of Mar. 2016 CentralTokyo Tokyo
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 offwhen disasters strike. Steps • Developing water transmission network • Rezoning water distribution areas • Improving disaster preparedness plan
Development of Water Transmission Network Tama north-south transmission main Diameter2000mm Length 16km now under construction Ozaku PP Higashimurayama PP Tama hills transmission main Diameter1500mm Length 32km Finished in 2015 : Purification Plant Higashiyamato SS : Water Supply Station : Pumping Station Haijima SS : Transmission Pipe (existing) Goal Narahara SS • Improve reliability of water supply even in emergencies • Replace aging pipes without disruption of water supply Hijirigaoka SS Yarimizuoyama SS
P P P P P Rezoning of Water Distribution Areas Each city supplied water in its district only. Water Supply Station Distribution Pump P Rezoning makes water supply more efficient. Gravity Flow Pressured flow C town D city Integration of facilities P P Interchange of water supply C town P Utilization of gravity flow D city Goal A city B city • Provide tap water anytime by interchange of water supply • Improve facility management by integration of facilities • Save energy by taking advantage of gravity flow A city B city
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.
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!!
Thank you for your attention Suiteki-kun (Drop) Mizutama-chan (Polkadot)