Case Introduction of
Consistent Environmental
Consideration through
Planning and Designing Stages
in Okinawa Prefecture, JAPAN
NIPPON KOEI CO., LTD.
as Project Environmental Study Team
Ritsuko SATO
Yasusuke KUROSAKI
Masanao NISHIMURA
Cooperate with:
Okinawa Development and Promotion Bureau CABINET OFFICE
Hiroshi TOMITA
Okinawa Institute of Science and Technology Promotion Corporation
Shozo ENOKITA , Tmeichi NAGAHAMA
NIKKEN SEKKEI LTD , Kuniken LTD, Kornberg assoiate JV
Takeshi OKAMOTO
OHBA CO.,LTD.
Kazuhiro HAGINO
CONTENTS
• Condition of Japanese Environmental Impact
Assessment
• Summary of Project
• Work Flow and Environmental Approach
• Environmental Consideration on Land
Preparation Area
• Comparison of the Project Area and
Development Alternative
• Environmental Consideration on Detail Design
• Afterword
Condition of
Japanese Environmental Impact Assessment
• EIA was legalized for 10 years and generalized
in Japan
• Issues on EIA was clalified
– Needs on introduction of SEA
→
Case Introduction on Consistent Environmental
Consideration through Planning and Designing
Stages
> Intimate Cooperation with Design Team for
Environmental Consideration
Summary of Project
• Establishment of World Class Graduate University
• Social Needs:
– Contribution of Okinawa Pref. on science and technology
development
– Contribution on self- growth in economy and sustainable
development
• Planning Site:
Onna Village (middle of Okinawa island), Okinawa Pref.
• Planning Area:
222ha, included land preparation area of approximately 21ha.
Planning Site and Project Area
Jimun River
Okinawa
Island
Ohminato
River
Shirin
River
Maekawa
River
River
Planning
Site
Project Area
Natural Environment of Planning Site
• Rich of Natural Environmental Resources
Columba janthina
Scleria rugosa
Important
Animals
Approx. 130 species
Important
Plants
Approx. 90 species
Heterotropa sp.
Community of Aristida takeo
Tylototriton andersoni
Work Flow and Environmental Approach
【Work Flow】
【Environmental Approach】
Planning area was decided for Onna Village
Start of Environmental Survey
Jan 2004
Apr. 2003
Scoping Document
May 2005
Evaluation of possible land preparation area
on the planning site
Evaluation of the environmental
protection area
Preparation of 4 alternatives
Environmental comparison study for
4 alternatives
Selection of SOUTH part development
alternative and preparation of MP by
compromising 2 alternatives
Nov. 2005
Determination of Master Plan
Drafts EIS
Jan. 2006
Determination of Detail Design
Feb. 2006
Final EIS
Feb. 2007
Environmental Approach on Selection of Land
Preparation Area
• River conservation（plants,animals,red cray, erc）
• Evaluation of the Environmental protection area
[Examples of indexes]
• Scrub forest of Pinus
• Basin of intake
luchuensis
weir
• communities of Aristida takeoi • Area of elevation
over 100m
• Wetlands
etc.
• Heterotropa sp.
• Gastrodia sp.
• Tylototriton andersoni lalva
Prepareration of Altanative
Plan A
N
Plan B
Alt. Concentrate
North
Alt. Spread
South
Project Area
Future Expansion
Alternative
Indicators
Jimun river
SOUTH
Alt.
concentrate
SOUTH
Alt. spread
NORTH
Alt. A
NORTH
Alt. B
0.0%
0.0%
14.9%
14.4%
Basin
Ohminato river
modification
Shirin river
rates
1.1%
1.1%
9.3%
6.9%
44.1%
43.1%
0.0%
0.0%
Maekawa river
18.1%
20.1%
11.7%
11.3%
Change ratio of
Marine Terrace
16.0%
16.4%
11.9%
8.9%
8.4%
9.0%
11.4%
9.8%
approx. 240
approx. 240
approx. 260
approx. 310
approx. 180
approx. 160
approx. 200
approx. 200
geography
& geology
Environ
mental Plant
Impacts
Animal
Landscape
Change ratio of
natural plant
comunity with
7grade and over
Change number of
important plant’s
breeding point
Change number of
important animal’s
verified point
Landscape for major
spot
viewable from 6 points
among 7 points
Not exist
Outdoor recreations
Historical & Cultural Environment
viewable from all 7 points
No modification
Modify former charcoal
kiln site
Environmental Consideration on D/D
 Modification evasion of habitat of important land shelfish
Important
land shellfish
Avoidance
M/P
D/D
Fishway Design
A
Fishway
Natural
Stones
+52m
Path
A
’
Detailed Section
Drawing
+56.5
m
Design of Selected Plan
•
•
•
Not the plan to cut the ridge and
fill the river.
Allocate the buildings at narrow
ridge area.
The buildings was linked by
skywalk to conserve the various
environment of valley.
Conclusion
• Environmental consideration since initial
planning stage to decide land preparation area
inside the huge planning site.
• Consistent environmental consideration through
planning and designing stages by intimate
cooperation between environmental and design
teams.
Afterword
• At initial stage, comments to consider natural
environment was given by Academic Expert.
However, He evaluated us “this is the only plan
can be satisfied under harsh environmental
conditions” finally.
• Construction works was started on April 2007.
Environmental monitoring is on-going.