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

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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
ThemeFIDIC PSM Code Sub-theme Core project indicator
Safety Mortality Contribution to protection of human loss due to floods
Relevance to project Contribution to protection of human loss due to natural disasters Contribution to protection of human loss due to natural disasters
Countermeasure Riverbed Dredging and levee reinforcement Riverbed Dredging and levee reinforcement
Project indicator Human loss due to floods after commencement of operations Human loss due to floods after commencement of operations
Project evaluation No human loss due to floods after commencement of operations. No human loss due to floods after commencement of operations.

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(2) Economic dimension Economic Loss
ThemeFIDIC PSM Code Sub-theme Core project indicator
Institutional capacity Disaster preparedness response Contribution to protection of economic loss due to floods
Relevance to project Contribution to protection of economic loss due to natural disasters Contribution to protection of economic loss due to natural disasters
Countermeasure Riverbed Dredging and levee reinforcement Riverbed Dredging and levee reinforcement
Project indicator Damaged households by floods after commencement of operations Damaged households by floods after commencement of operations
Project evaluation No damages to households due to floods after commencement of operations. No damages to households due to floods after commencement of operations.

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(2) Economic dimension Water Use
ThemeFIDIC PSM Code Sub-theme Core project indicator
Institutional capacity Water use Contribution to protection of economic loss due to droughts
Relevance to project Contribution to protection of economic loss due to droughts Contribution to protection of economic loss due to droughts
Countermeasure Water storage by construction of gates Water storage by construction of gates
Project indicator Water demand coverage during droughts after commencement of operations Water demand coverage during droughts after commencement of operations
Project evaluation 76 of water demand covered during droughts after commencement of operations. 76 of water demand covered during droughts after commencement of operations.

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(3) Environmental Dimension Algae Concentration
ThemeFIDIC PSM Code Sub-theme Core project indicator
Fresh water Public water body Measurements of changes in algae concentration
Relevance to project Effects of project on algae concentration in public water body Effects of project on algae concentration in public water body
Countermeasure Gate operations during high concentration periods Gate operations during high concentration periods
Project indicator Concentration of chlorophyll a in stored water Concentration of chlorophyll a in stored water
Project evaluation Almost no change. Almost no change.

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(3) Environmental Dimension BOD Concentration
ThemeFIDIC PSM Code Sub-theme Core project indicator
Fresh water EN-14 Water quality Measurements of BOD on water bodies affected by project
Relevance to project Effects of project on BOD in water bodies Effects of project on BOD in water bodies
Countermeasure Aeration by aerator-equipped boat Aeration by aerator-equipped boat
Project indicator Concentration of BOD on water bodies affected by project Concentration of BOD on water bodies affected by project
Project evaluation Almost no change. Almost no change.

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(3) Environmental Dimension DO Concentration
ThemeFIDIC PSM Code Sub-theme Core project indicator
Fresh water Water quality Measurements of DO (Dissolved Oxygen) on water bodies affected by project
Relevance to project Effects of project on DO in water bodies Effects of project on DO in water bodies
Countermeasure Aeration by aerator-equipped boat Aeration by aerator-equipped boat
Project indicator Concentration of DO on water bodies affected by project Concentration of DO on water bodies affected by project
Project evaluation Almost no change. Almost no change.

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(3) Environmental Dimension Fish Catch
ThemeFIDIC PSM Code Sub-theme Core project indicator
Fresh water Fisheries Monitoring of changes in annual catch of Satsukimasu (Red-spotted trout)
Relevance to project Effects of project on annual catch of Satsukimasu (Red-spotted trout) Effects of project on annual catch of Satsukimasu (Red-spotted trout)
Countermeasure Construction of three kinds of fishways Construction of three kinds of fishways
Project indicator Changes in annual average catch of Satsukimasu (Red-spotted trout) after commencement of operations Changes in annual average catch of Satsukimasu (Red-spotted trout) after commencement of operations
Project evaluation Slightly decreased, but not significant. Slightly decreased, but not significant.

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(3) Environmental Dimension Fish Preservation
ThemeFIDIC PSM Code Sub-theme Core project indicator
Biodiversity EN-17 Species Measurement of the affect of project on the abundance of key species - Ayu (Plecoglossus altivelis altivelis)
Relevance to project Effects of project on abundance of key species Effects of project on abundance of key species
Countermeasure Construction of three kinds of fishways Construction of three kinds of fishways
Project indicator Changes in upstream migration of Ayu Changes in upstream migration of Ayu
Project evaluation Slightly decreased, but not significant. Slightly decreased, but not significant.

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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