2011/6/3

Murasaki River / Kitakyushu city
Masafumi ITOJapan River Restoration Network
Panel on Urban Water/River Front Redevelopment
World Bank Tokyo Office –May 30th, 2011

Location
Region been thesubject of development
projects

Murasaki River
MurasakiRiverRi

River name:Murasaki River
Specified division of river: Class B river
River authority: Kitakyushu city (in down stream)
Fukuoka Pref. (in upper stream)1

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Background
1. Flooding• The width of Murasaki river had been narrowed
in its river mouth, was the situation in floodprone lower reaches.
• The great deal of harm was caused in the floodthat had occurred in 1953.

1953, Muromachi

1953, Daimon

Background
2. Water quality･ Till around in 1970’s, the river was advanced bypollution occurred from industrial drain and thehousehold effluent, etc. and the stink was tossed.
industrial drain

3. Land use･ Till around in 1970’s the river was advanced by pollution
occurred from industrial drain and the household effluent,etc. and the stink was tossed.

Previous color of Dokai Bay22011/6/3

Background
3. Land use• Illegally constructed residences stood close together inthe banks of a river.
• As for these illegal buildings had been one of the factor
to contribute for water pollution and security
deterioration, as well as breaking urban view.

Illegally constructed buildings (around in 1970 -1980)

The Murasaki River Restoration Activities
1. Flooding
1953; The great deal of harm was caused in the flood that hadoccurred.
1969; River improvement works (such as riverbed excavation)
had started.
started1987; The Ministry of Land, Infrastructure, Transport and Tourism
founds “My town, my river development project".

The colored part of theprovince where the river isnarrow river before renovation:After improvement:River Channel planning:Present river32011/6/3

The Murasaki River Restoration Activities
2. Water quality
1963; River cleaning action had started by the citizen volunteer.
1967; Drainage maintenance was begun, and the spread of sewage
became 99.8% by 2005.

The Murasaki River Restoration Activities
3. Land use
Before; Illegally constructed residences stood close together in the banks of a river,and the cause of the obstruction of the spectacle and the deterioration of thewater quality before.
1966 ~ 1980;; The an unlawful houses was executed. An illegal
g resident had
migrated to the municipal dwelling house.
1988; "Kitakyushu Renaissance plan (KR plan)" was settled on, andenhancement and strengthening the urban function of the Kokura district,including Bashaku Area, were promoted.

Illegally constructed buildings(around in 1970 -1980)

After development(around in 1970 -1980)

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2 major River and city Improvement Projects settled"My Town, My River Development
Project“ is …
The project which aims not only to improve
flood control and river improvement but also
to form an attractive urban space by linking
the river development with redevelopment
and road construction that were plannedaround the city.
“The Master Plan to Develop Attractive
Waterfront Development” was formulated by
Kitakyushu city government in 1994.
My Town, My RiverDevelopment ProjectRiver district
improvement by
Kitakyushu city
government"Kitakyushu Renaissance plan “ is …
Urban redevelopment plan to renewal
Kitakyushu city central waterfront in the themeof "International technology city“.
Aｔ the time plan has settled, the heavy industry,th major
thej industry
i d t off Kitakyushu
Kit kh city,it showedhd
the tendency to stagnate by converting energy
from coal to oil.

Kitakyushu Renaissance plan

Urban area
development by
Kitakyushu city
government

Outline of Project
Under the operation of Kitakyushu City, projects which aimed not only for flood
control but also to maintain the park improvement and the road in the waterfront
additionally.

River district improvement
In conjunction with urban area development,
succeeded in creating an open space
through the integration of water and river
private land.

Urban area development
Determined position of buildings along theriver matching with the project consistent
with river improvement, succeeded in thecreation of a waterfront terrace whichacross private land and river bed.
This waterfront terrace is also used as apassage for river management.

waterfront open space and terrace

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Traverse planning of the Channel
Implementation of the Basic Plan of Murasaki River features are as follows.
• To ensure the flood channel wide as possible for the use of the river bank as apark.
• To increase hydrophilicity, the high-water revetment has to have gradient atleast 20 percentpercent.
• Low-ater embankments, taking into account the preservation of natural
ecosystems and hydrophilic, with a gradient of 30% at least, and devised
natural stone for habitat.
• Section that houses crowded along the river embankments and 5 percent forpriority flood control function.
Spread the river, explore the riverbed toensure higher safety from flood.

excavate

Former 59ｍ
After 89ｍ

Cross-sectional image of the river improvement

private land (3m),Development of integrated features Someto use as a passage for

Building

river management.River
management corridor on
private land as a partial

Murasaki River
Land acquisition

FormerRiverDistrictprivate land

AfterDevelopment

private land

Land Use inProjectSpace limitations allow construction

RiverDistrict

Landacquisition• Reasons on the landscape and land use, river area of 1m to 6m in thefirst floor of the building set back on private land and 3m, and 4m in total
to be used as a passage for river management.

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Effect of integrated development
Effect on river improvement• River site secured in a downtown redevelopment project, by using
some private land, succeeded in securing the necessary space for rivermanagement.

Effect on urban development• Development of urban area projects as well as river district, waterfront
space has been created in unified design with river views.

Benefits for private sector• As for projects management, including user fees in public facilities forriver
i
iimplovement,
lt iimproved
d ffee bbalancel
off urbanb redevelopment
dlt
projects.
• As a good image of waterfront been formed, an improved attraction of
hotel and restaurant.

Effect of integrated development
Current state with no illegalbuildings and ensured safety
from the flood

The bridge was built connecting
both banks of the river72011/6/3

Effect of integrated development
Current state with city's historic
castle and the urban area

Current state, children
playing in tidal sandbar.

Current situation
In presense various events are held in the maintenance interval of
Murasaki river, throughout the year, which formes the bustling waterfront.

Oyster pan houseboat cruise in February

Ukai viewing pleasure boat cruise in May

Junior expedition event in July

Regatta boat race in March

Ribaasuron in August

Goby fishing competition in November

Dragon boat competition in April

Summer Festival in August

Illumination in December

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Thank you for your kind attention.
http://www.a-rr.net/jp/en/
Japan River Restoration Networksecretariat

Foundation for Riverfront Improvement and Restoration (RFC)
7th Floor, 1-17-24 Shinkawa, Chuo-ku, Tokyo, JAPAN, 104-0033
TEL: +81-3-6228-3860 FAX: +81-3-3523-0640
E-mail: info@a-rr.net Website: http://www.a-rr.net/jp/
Japan River Restoration Network (JRRN) is operated by Foundation for Riverfront
Improvement and Restoration and CTI Engineering Co., Ltd. as joint study
on development of Asian River Restoration network.

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