Experience and Strategy of the City of Yokohama Capabilities & Achievements of Yokohama Waterworks Bureau CHIAKI SUZUKI JICA Expert Project for Improving the Capacity of WASAs in Punjab Province 1
Overview of Yokohama 2
Outline of Yokohama City Lahore Yokohama Lahore Yokohama Population 3.72 million Household 1.65 million Area 435 Km2 Precipitation 1,688 mm Budget 2.6 trillion PKR No. of City Officials 25,765 (March 2015) 3
Outline of water facilities in Yokohama Lahore Yokohama Lahore Yokohama Population served 3.72 million Service rate 100.00% Average daily water supply 252MGD Total length of distribution pipeline 9,331 km Leakage ratio 5 % Average supply person per day 52.3 G (March 2015) 4
The water cycle in Yokohama 5 Water Resources 3 Water Purification Plants, 2 Industrial Water Treatment Plants 23 Water Distribution Reservoirs 3.7 million citizens and economic activity of the City 11 Wastewater Treatment Plants 2 Sludge Treatment Plants 5
6 From water resources to purification plants Yamanashi Pref. Shizuoka Pref. Doshi River Numamoto In. Sakawa River Abiko In. Doshi River Line (gravity flow) Sagami River Banyu River Sagami Reservoir Line (gravity flow) Kawai P.P. Nishiya P.P Kosuzume P.P Samukawa In. Banyu River Line (pump-boosting) Tokyo Yokohama
Kawai Membrane Water Purification Plant Kawai Purification Plant Named CERAROCCA - The largest membrane filtration facilities in Japan - Ceramic membrane filtration system 7
8 Waste Water Treatment Plant Hokubu Sewerage Center -Smart use of reclaimed water, sludge and energy- Hokubu center recycle the sludge after reduce the sludge weight about 1/400 and remove the odors. Digester gas is using as gas electric power generation.
9 Countermeasure of NRW in Yokohama
Comparison of Leakage Ratio Source : "based on the water security study group final report (2008.7) etc." 10
Leakage Rate (%) Leakage Leakage rate history of Yokohama 70 60 50 40 30 20 10 70-80? Acoustic Rod (1948) Leakage Detector (1959) Prevention Section 25.8 Correlative Leak Detector 0 1945 50 55 60 65 70 75 80 85 90 95 00 05 10 48 Year Presumption Measured (1985) Minimum Night Flow Measure (1984) Leak Noise Collection (2000) 5.0 15 11
Leakage Rate (%) Aged Pipe Replacement (km) Pipe replacement & Leakage rate 12 25 20 Length of aged pipe replacement around 100km/year 4,210 5,000 4,000 15 10 Leakage Rate 3,000 2,000 5 5.0 1,000 0 1969 75 80 85 90 95 2000 05 10 15 Year 0 12
Approach of Prevention Work in Yokohama Water Meter Accuracy Direction of Meter Reader Education to the Customer Pipeline Replacement Construction Division (4 offices) Water Supply Maintenance Division (8 offices) NRW Reduction Water Leakage Management Section Repair works (Surface Leak) Programed Works (Underground Leak) 13
International cooperation 14
Dispatch of experts (1973-2014) 289 experts to 31 countries Region Countries Experts Asia 14 229 Oceania 3 1 Africa 10 46 Middle East 4 13 Total 31 289 * * Some of the staff were dispatched multi country. Experts were dispatched for Non-Revenue Water reduction Water quality improvement - O&M / Management of facilities Leak detection in Hanoi, Vietnam 15
16 Acceptance of trainees (1987-2014) 2,947 trainees from 129 countries
17 Training in Yokohama (Draft) 1st Year Management 10 15 Trainees 2nd year Engineer and Faculty 10-15 Trainees 3rd year Engineer and Faculty 10-15 Trainees Improving the Capacity of WASAs in Punjab Province
Cooperation Skills of YWWB Technical Assistance Act Plan Acceptance of Trainees International Cooperation Action Dispatch of Experts Check Do Supporting/ Consulting private Companies 18
Technical assistance to Vietnam China Lao Thailand Hanoi Vietnam Hue JICA Grassroots Technical Cooperation Project (2003-2005) JICA Project on Human Resources Development for Water Sector in the Middle Region of Vietnam (2007-2009) Cambodia Ho Chi Minh JICA Project on Capacity Development for Urban Water Supply Utilities in the Central Region (2010-2013) JICA Grassroots Technical Cooperation Project (2013-2016) Leak detection in Hue 19
Outcome of Project in Vietnam Leakage Detection Water Distribution Network Human Resource Development Water Quality Management Customer Services In August 2009, drinking water directly from the tap came true in Hue, by knowhow and skill of Yokohama! 20
21 Supporting private companies Public-Private Alliance Offering Solutions to Water-related Issues JICA, Ministries Supporting Water businesses overseas 160 Private Companies Cutting-edge technology Yokohama Water Business Association City of Yokohama Know-how of planning, construction, O&M
Business matching Surveys and technical demonstrations in Vietnam Sampling of sand filter media Operating sewerage treatment plant Presentation and meeting Executive Forum in Yokohama Training session 22
Businesses along with Yokohama Water Co. Yokohama Water Co., Ltd is a subsidiary company of YWWB Yokohama Water Co., Ltd. offers the experience for 128 years Nihon Genryo Co., Ltd. & YWC Mobile sand filtration equipment Rapid sand filter maintenance work, Cebu, Philippines GOODMAN INC. & YWC Yachiyo Engineering Co., Ltd. & YWC Reduction of Non- Revenue Water, Nigeria Reduction of Non- Revenue Water utilizing leak detector, Medan, Indonesia 23
24 First Step for Improvement of Leakage Prevention
Present Situation of Waterworks 1. Total distributed volume 2. Water billed volume (Revenue) 3. WASA's used volume 4. Uncollectable bill volume 5. Water meter error volume 6. Illegal connection volume 7. Leakage volume (Non-Revenue) 8. Other volume 25
Distributed Water Volume Analysis of YWWB Data: Yokohama Waterworks Bureau (March 2014) 26 Revenue Water [92.0%] Water Charge Other Income 92.0% Distributed Water Volume [100%] Non-Revenue Water [8.0%] Leakage 5.0% Illegal Connection 0.0% Water Meter Error 1.7% Uncollectable Account 0.0% Used by YWWB 1.0% Other (Mediated) 0.3%
General idea of the first Step for Leakage Prevention Items Leak Survey Leakage Repair Minimum Night Flow Measurement If not, prepare below. Establish survey team / Prepare suitable leak detecting equipment / Design a leak survey plan / Make pipeline map book and coloring in the mesh / Review and evaluate current plan Establish repair team / Build quick contact and repair system after finding the leakage Create DMAs and install water meter and mother meters / If cannot install mother meter, use ultrasonic flowmeter 27
Specific plan for Leakage Prevention Install the Water Meter - Surface leak is in need of repairing immediately - Move to flat rate to metering Rate 24 Hours Water Supply - Develop new resource, DMA, etc. Distribution Water Analysis - Establish the prevention Plan - Decide the target value and target year NRW Reduction Action - Leakage detection, Replacement, Repairing and etc. Improvement of Customer Satisfaction - Return to NRW reduction if not satisfied 28
April - Beautiful Season in Japan Mild Climate Monthly average temperature 14.2 o C / 57.5 o F City is dyed pink Japanese Spring Food Cherry Blossom 29
30 Thank you for your attention. See you soon in Yokohama!