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Dr. Yoshihiko Yamashita (CTI Engineering) Koichiro Haru (Nihon Suido Consultants)

FIDIC 2005 Beijing WS-6 September 6, 2005 . Sustainability on the Construction Project of Nagara River Estuary Barrage and Application of PSM Indicators. Dr. Yoshihiko Yamashita (CTI Engineering) Koichiro Haru (Nihon Suido Consultants)

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Dr. Yoshihiko Yamashita (CTI Engineering) Koichiro Haru (Nihon Suido Consultants)

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  1. FIDIC 2005 Beijing WS-6 September 6, 2005 Sustainability on the Construction Project of Nagara River Estuary Barrage and Application of PSM Indicators Dr. Yoshihiko Yamashita (CTI Engineering) Koichiro Haru (Nihon Suido Consultants) (On behalf of the Association of Japanese Consulting Engineers) Most data and pictures by courtesy of Chubu Regional Development Bureau, Ministry of Land, Infrastructure and Transport, and Chubu Regional Bureau, Japan Water Agency

  2. Agenda • Outline of Nagara River Improvement Project • Introduction of Japan’s major flood protection project • Case Study on Application of PSM Indicators to Nagara Project • Case study to identify the issues when applying FIDIC’S PSM indicators to disaster protection projects

  3. Why Nagara River Project? • Big national project • Long term • Public involvement • Accountability • Environmental considerations • Already in operation • Monitored after construction (data availability)

  4. Project Site River Basin Kiso River Nagara River Ibi River Japan Sea Tokyo Nagoya City Pacific Ocean Nagara Estuary Barrage (Located 5.4 km from the river mouth) Ise Bay

  5. Background – Flood protection • River improvement started in early 1600’s • Technology transfer from Dutch engineers in Early 1900’s River Improvement Plan in Early 1900’s

  6. Background– Flood protection Recent Disasters • Serious flood damage due to strong typhoons during 1959-1961 – Hundreds were died or went missing The Serious flood due to Ise Typhoon in 1959 The flood in 1976

  7. Background– Water use • Significant ground subsidence due to groundwater intake • Saltwater infiltration to groundwater • Water demand increase

  8. Main Concerns & Countermeasures Flood Control Water Use Flood Saltwater Infiltration Ground Subsidence Riverbed Dredging Surface Water Use Droughts, Demand Increase Salt Water Inflow Estuary Barrage Fresh Water Shortage Environmental Considerations Water Pollution, Eutrophication Obstruction to Fish migration LEGEND Aeration By Equipped Boat Fishways, Gate Operations Monitoring Concerns Counter-measures

  9. Flood Control Alternatives to improve flow capacity • River improvement Selected Design Flow Capacity (Historical Maximum Flow) 7,500 m3/s Flow Capacity Before Dredging 4,450 m3/s

  10. Overflow operation Underflow operation Upstream Upstream Downstream Downstream Water Use • Estuary Barrage Gates Maximum Available Flow 22.5 m3/s

  11. Environmental consideration • Fishways Attracting-flow type Natural-shaped type Lock type Overflow Operation Underflow Operation

  12. Application of PSM Indicators to Infrastructure Construction • PSM Indicators for Nagara River Estuary Barrage (case study) • Purpose • To clarify the applicability of FIDIC’S PSM indicators to disaster protection projects • Method • According to FIDIC’s PSM Guideline • Based on actual monitoring data available

  13. (1) Social Dimension – Human Loss

  14. (2)　Economic dimension– Economic Loss

  15. (2)　Economic dimension– Water Use

  16. (3) Environmental Dimension – Algae Concentration

  17. (3) Environmental Dimension – BOD Concentration

  18. (3) Environmental Dimension – DO Concentration

  19. (3) Environmental Dimension – Fish Catch

  20. (3) Environmental Dimension – Fish Preservation

  21. (4)　Comprehensive Evaluation Social Dimension Human loss due to floods after commencement of operations Water demand coverage during droughts after commencement of operations Concentration of chlorophyll a in stored water Economic Dimension Changes in annual average catch of red-spotted trout after commencement of operations Damaged households by floods after commencement of operations Environmental Dimension Changes in upstream migration of Ayu Concentration of BOD in water bodies affected by project Concentration of DO in water bodies affected by project

  22. Proposal on PSM Indicators for Infrastructure Projects • Indicators for projects in developed countries • Indicators on external communication with stakeholders • PSM for operation phase • Indicator weights

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