The Role of Consulting Engineers for the Integrated Basin Management Yumio Ishii Chairman, CTI Engineering Past President, Japan Civil Engineering Consultants Association 1
Public Part 1. The Role of Consulting Engineers in Public Water Infrastructure Projects Needs Consultant Advisory Services for Procurement Contractor Project Formulation Feasibility Study Design Construction Advisory Services Construction Management Decommission/ Renewal Operation Maintenance Government 2
CTI s Construction Management Project ISAWA Dam Isawa Dam is a multi-purpose dam for flood control, irrigation, water supply, hydro-power generation and environmental flow, and will become one of the largest rock-fill dams in Japan when completed in 2013 3
Private Finance Initiatives (PFI) Consulting engineers are involved in planning and design as part of the private sector consortium, or act as an advisor to the government or local authority Government/ Local Authority Consulting Contract Planning & Design Special Purpose Company (SPC) Financing Construction Contract Ownership O&M Contract Contractor Facility Construction Operation & Management Advisor Financial Market Management Company 4
Part 2. Integrated Basin Management Integrated Basin Management is the process of coordinating flood control, water use, and environmental protection in an integrated manner across the entire river basin, while ensuring coordination among stakeholders 5
History of Integrated Basin Management Flood Defense and Water Use at Specific Location or Point Ring Enclosure Levees (waju) to protect communities Continuous High Levee from 19 th century to 1970s Multi-purpose Dams in 1960s Comprehensive Flood Control Scheme in1974 Extending Flood Control from Channel to Basin from Line to Plane Integrated Basin Management in 1997 Flood Control, Water Use, Environment Stakeholder Participation Planning against Floods and Droughts exceeding Design Level 6
Comprehensive Flood Control Development Restriction Land Use Guidance Flood Resistant Housing Hazard Maps Drainage Pump Area Prone to Inland Flooding Levee Flood Warning, Evacuation Area Prone to Inland Flooding Inundation Permissible Zone Regulation of Drainage Pump Dam Site Detention Permeable Pavement Detention in Private Gardens Detention Pond Flood Detention Reservoir used as recreational facility (parks, stadium) High Standard Levee (super levee) Sea 7
Tsurumi River Multipurpose Retarding Basin Tsurumi River Multipurpose Retarding Basin serves as a flood control facility as well as a sports venue (International Stadium Yokohama), a recreational area, and a lush natural park. International Stadium Yokohama Courtesy: Keihin Office of River, Kanto Regional Development Bureau, MLIT 8
Comprehensive Sediment Control Forest Conservation Sediment deposition facilities and bypass tunnel Coastal restoration Development of sabo works and permit an appropriate amount of sediment flow Measures against lowering of riverbed Restore natural sediment flow Sediment Control Issues Sediment outflow Sabo works, forest conservation Sediment deposition in dams Lowering of Riverbed Coastal erosion Comprehensive Sediment Control Monitoring of sediment amount and quality Restoring natural sediment flow Coastal (beach) restoration 9
Water Use Multi-purpose Dams Irrigation, domestic & industrial water use, flood control, environmental flow Hydro-power generation (9% of 974 billion kwh of total power generated in Japan) Coal & Oil:34%, Gas: 26%, Nuclear: 31% Water Transfer between Basins Coordination among Water Users during Drought Coordinated Operation of Multiple Dams Utilizing existing infrastructure and maximizing benefit Groundwater Use & Regulation Desalination Issue of concentrated seawater Water Recycling and Rainwater Utilization 10
Rainwater and Recycled Water Utilization CTI s Fukuoka office building utilizes rainwater and recycled water supply bought from Fukuoka City, and conserves about 80% (2,240m 3 ) of all miscellaneous water uses in the building. 11
Environmental Protection Pollution Control and Water Quality Improvement Sewerage system (covers 71% of all population in Japan, 98% coverage in cities with population > one million) Sumida River (Tokyo) : BOD 40mg/L in 1961 3.9mg/L in 2002 Combined Sewer Improvement Enforcement of discharge regulations and water pricing Nature-Oriented River Works Preservation or creation of the natural environment and scenery that are in harmony with culture and history of the community Fundamental to all river works in Japan Environmental Flow Discharge from Dams Guideline for environmental flow for power generation facilities 12
Waterfront Improvement Scenery Improvement Water amenity space (Furukawa River) Vitalization of Commercial Districts River side promenade (Dotonbori River) Nihombashi Restoration 13
Furukawa River Restoration Project Furukawa River Furukawa River was restored into a water amenity space in the urban city of Tokyo in 1974, where CTI provided the concept for water amenity creation. Furukawa River in the 60 s Present Furukawa Water Amenity Park 14
Dotonbori River Waterfront Development Dotonbori River Dotonbori River flows through the busiest commercial district of Osaka. Tonbori River Walk, attractive river side promenades, were developed along the river, revitalizing the commercial businesses in the district. Source: Osaka City Homepage Source: Osaka City Homepage 15
Nihombashi Restoration Project Nihombashi is a historic bridge located in the heart of Tokyo. It s a symbolic landmark but is covered by an expressway built for the 1964 Tokyo Olympics. The project aims to relocate the viaduct and restore the Nihombashi waterfront. Courtesy: Utsukushii Keikannwo Tsukuru Kai Courtesy: Tokaido Hiroshige Museum Proposal by Nihombashi Renaissance Committee 16
Coping with Climate Change Improvement of prediction accuracy Changes in safety levels against floods and droughts (shorter return period) Intensification of climatic phenomena Increase in regional and seasonal variation Mitigation in water sector Reducing GHG emissions related to water projects and activities Adaptation Full utilization of existing structures and construction of new ones Modification to land use and way of living 17
Conclusion Integrated Basin Management is a must for adequately adopting to the future climate change risks Coordinated management in flood control, water use, and environmental protection across the entire river basin Participation of and coordination among stakeholders 18
Thank you for your attention! URL: http://www.ctie.co.jp Email: ctie_hq@ctie.co.jp 19