6th International Forum on Waterfront and Watershed Restoration
29 September 2009 (Asian River Restoration Network)

2009. 9. 29
Korea Institute of Construction Technology

1ContentsⅠ Outline
Ⅰ.
O tli
Ⅱ P
Ⅱ.
Projectj t St
Strategyt
Ⅲ Core Projects
Ⅲ.
Ⅳ Expected Effects
Ⅳ.
2

3

Status of the River 文明発祥 水力社会
 治山治水 樂山樂水44

Background
Frequent Flood Damage Due to Climate Change¾

Annual Investment $ 0.8 bil., Damage $ 2.3 bil., Rehabilitation $ 3.5 bil.

8Am ountt (b illion USD)

7Dam ag e

M ean of '80~ '01

M ean of '02~ '066543215200
05

20000

Year

199
95

199
90

198
85

198
800

FrequentqDrought
g Damageg Due to Climate Changeg¾

Serious regional water shortage attendant upon periodic drought¾ Wateroff 1 billion
W t shortage
h t
billi m3 ini 2016

1995
62001

Region of Water Shortage (Restriction of Water Supply)

Water Pollution & Ruin of AquaticqHabitat¾ Imprudent farming inner river zone
¾ Aggravation
ggof water p
pollution due toinsufficient water in drought season

7

Inadequate use of riverine area
¾ Parking lot¾ Insufficient space for leisure and culture

Economic crisis

8¾

Increase of unemployment rate¾

Slowdown in economy of local region

Main Objects

910

1. Flood Control
Against 200-year return period (present: 100-year)
Lowering the design flood level (0(0.4~3.9m)
4~3 9m) by dredging (0(0.5757 bil m3)
Lowering
g flood level byy dredging
g g
100-yrFlood level

Dredging

Using a new-concept flood control measure instead ofembankment raising11Installing flood control reservoirs and retention ponds (0.05 bil m3)
channel+watershedspace for stream
ecology improvement inordinaryy time
Retention Ponds (4 sites)

FloodFldC
Controlt lReservoirs (2 sites)

12watershedReinforcement of deteriorated embankment &Expansion of drainage gates at estuary barrier
Reinforcement of deteriorated embankment (620km)

Quick flood drainage by expansion of drainage gates
Nakdong river : 475m → 760 m (expansion of 6 gates)
Yeongsan river : 240 m → 480 m (expansion of 8 gates)13

2. Abundant Water Resources
Provision against water scarcity (1(1.00 bil m3 in 2016) & drought
Securing water resources (1.3 bil m3)
Water resources of 0.8 bil m3 by dredging & installation of 16 weirs

River maintenance waterHan R.
GGeumR.
R

Installation of weirs as alandmark considering theNakdong R.

surroundings* Installation of fish way and wetland

14

Yeongsan R.

Benchmarking of foreign weirs
Hagestein Weir of Rhine River, The Netherlands

Watergate closed

15

Watergate opened

Conceptual design of weirs

16Construction of medium sized multi-purpose
dams ((0.25 bil m3)
p p

Yeongju dam & Bohyeon dam in Nakdong rive basin
Connection of existing Andong dam & Imha dam (1.8km)

Yeongju dam

Connection of existing dams

Andong Dam

17

Imha DamRaisinga s g ttheeeexistingst g ag
agriculturalcu tu a reservoirs
ese o s (0(0.255bbil m3)
Selection of 96 sites amongg about 17,600,sites
Intensive release of water in dry season

Raising method – type I
Increased HWL

Existing HWL

18

Raising method – type II

Increased HWL

Existing HWL

3. Water Quality Improvement & restoration of ecosystem
Water Quality Improvement
Expansion of sewage plants and high standardization¾ Installation of 750 sewage treatment plants until 2012
¾ Newly establishing the stream environmental standards

for COD and TP

19

Restoration of ecosystem
Clearing the farmland such as removing vinyl greenhouses

Restoring ecosystem such as creating ecological rivers andurban stream along 929 km of river zone
Creating 35 ecological wetlands along 43.5km area
Restoring abandoned streams (2 sites)204. Creation of complex space along rivers

Leisure Space
Installation of bike way along rivers (1,728km)

Building of network connecting National & Provincial roadsPromenade, link of inline skates, facilities for water sports

21

Waterfront (illustration)
Linkingg between rivers and urban areas
International Business Center & Commercial Center, etc.

Commercial Center

International Business Center22

5. Budget
Total budget : 18.5 billion USD
Main projects : 14.1 billion USD¾ Projects of main streams¾ River regulation, weirs, dams, retention ponds

Directly linked projects : 4.4 billion USD¾ Projects of tributaries¾ Regulation of river environment, water quality improvement

Linked projects¾ Annual accomplishment by other ministries

2324

Han River – Flood Control, Restoration of Ecosystem, Recreation Spaces

BeforeBeforeYeoju Retention Pond

25

Yeongweol Retention Pond

Nakdong River – Flood Control, Securing Water & Restoration of Ecosystem
Haman Weir (Eco-resort)

BeforeDrainage Gates at Estuary Barrier

26

Geum River – Regional development linked with Baegje Cultural Inheritance
Buyeo Weir

Before27

Geumnam Wier

BeforeYeongsan River – Flood Control & Water Quality Improvement
Seungchon Weir

Damyang
FloodControl Reservoir
Normal time

Flood time
Before28

29

Leap to “the Advanced Country in Water Management”

Economic effects
For 4 years,
Flood damage+Rehabilitation=19.2
19 2 bil USD

Total budget=18.5 bil USD※ Annual
ua flood
ood dadamageage ((2.33bbill)+Rehabilitation) e ab a o (3(3.55bbill)=4.8) 8bbill US
USD30

B
Basici solution
l ti tto flflood
dddamage & watert shortageh t
py from 100-year
yyImprovementof flood safety
to 200-year
return p
periodBeforeAfter31

Dealing with extreme drought by securing additional water
resources of 1.3 billion m3Sound ecosystem by water quality improvement &river restoration
Improvement to ‘Swimmable
Swimmable Water’
Water (better than water of gradegrade-2)2)− Water of Grade-2 : BOD below 3 mg/L

Restoration of ecosystem by creation of wetlands in floodplains (35sites, 44km)

32

Rise of the standard of living and level of leisure and culture
I
Increase
off watert surface
f: 0.80 8 billi
billion m2 (40%)
Increase of water surface width : additionally 50~180m
Provision of spaces for culture, leisure and sports

33

AActivationi i off llocall economy bby GGreen NNew DDeall projectj
Clean energy of 280,000 MWh/yr by small hydropower plants
installed at 16 weirs
New jobs for 340,000 persons

H dHydropowerplantl t

Spread of economic effects

NNewjjobsb34

Epoch making flood control measures
Epoch-making
Re-creation of national land
Preparedness for 21C Water Era (low carbon)
Provision of more spaces for recreationaccording to the increase of national income35

Korea Institute of Construction Technology3636