Sustainability on the Construction Project of Nagara River Estuary Barrage and Application of PSM In

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Sustainability on the Construction Project of
Nagara River Estuary Barrage and Application of
PSM Indicators
FIDIC 2005 Beijing WS-6 September 6, 2005

• 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
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Agenda

• Outline of Nagara River Improvement Project
• Introduction of Japans major flood protection
  project
• Case Study on Application of PSM Indicators to
  Nagara Project
• Case study to identify the issues when applying
  FIDICS PSM indicators to disaster protection
  projects

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Why Nagara River Project?

• Big national project
• Long term
• Public involvement
• Accountability
• Environmental considerations
• Already in operation
• Monitored after construction (data availability)

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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
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Background Flood protection

• River improvement started in early 1600s
• Technology transfer from Dutch engineers in Early
  1900s

River Improvement Plan in Early 1900s
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Background Flood protection
Recent Disasters

• Serious flood damage due to strong typhoons
  during 1959-1961 Hundreds were died or went
  missing

The flood in 1976
The Serious flood due to Ise Typhoon in 1959
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Background Water use

• Significant ground subsidence due to groundwater
  intake
• Saltwater infiltration to groundwater
• Water demand increase

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

• River improvement

Alternatives to improve flow capacity
Selected
Design Flow Capacity (Historical Maximum Flow)
7,500 m3/s
Flow Capacity Before Dredging 4,450 m3/s
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Water Use

• Estuary Barrage

Gates
Maximum Available Flow 22.5 m3/s
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Environmental consideration

• Fishways

Attracting-flow type
Natural-shaped type
Lock type
Overflow Operation
Underflow Operation
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Application of PSM Indicators to Infrastructure
Construction

• PSM Indicators for Nagara River Estuary Barrage
  (case study)

• Purpose
• To clarify the applicability of FIDICS PSM
  indicators to disaster protection projects
• Method
• According to FIDICs PSM Guideline
• Based on actual monitoring data available

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(1) Social Dimension Human Loss
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(2) Economic dimension Economic Loss
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(2) Economic dimension Water Use
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(3) Environmental Dimension Algae Concentration
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(3) Environmental Dimension BOD Concentration
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(3) Environmental Dimension DO Concentration
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(3) Environmental Dimension Fish Catch
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(3) Environmental Dimension Fish Preservation
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(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
Concentration of BOD in water bodies affected by
project
Changes in upstream migration of Ayu
Concentration of DO in water bodies affected by
project
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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