Ecosystem-based
disaster risk reduction (Eco-DRR):
traditional knowledge, land use,
and transdisciplinary approach

Takehito Yoshida and collaborators
Research Institute for Humanity and Nature &University of Tokyo1

Mikatagoko Lakes, Fukui Pref.

Ecosystem-based DRR
Disaster Risk
Reduction+Ecosystemconservation &management

Natural hazard
Life & property

Avoiding exposure

Natural hazard
Life & property

Reducing vulnerability
MOE（2016）

2

Synergies among ecosystem services
DisasterDiverserisk
× ecosystem
reductionservices
Natural parks
Eco-tourism

Child care

写真）上越タウンジャーナル

AgricultureFisheries

Tourism resources

Traditional craftEcosystem
restoration

3

Floods due to heavy rainfall
Local newspaper reporting therecord-breaking rainfall anddamages in 2013, including theflood of Lake Mikata, Fukui

Fukui Shinbun (2013)4

Local history of floods
Historical records of natural disasters showing thefrequent occurrence of floods in this area
In recent years, floods occurred every ≈five years

Wakasa Mikata Jomon Museum (2014)5

Traditional land use
Houses are traditionally located at slightly elevatedareas to avoid flood damages
Village

Village

Paddy fields

Fukui Shinbun (2013)

shelakluasU

neil
or e

6

Conserving biodiversity...
Inundated areas are traditionally used as paddy fields
that provide habitats for fish and other organisms

7

...and ecosystem services
Fish of the lake supplies various ecosystem services,
including local food culture8Revealing multi-functionality of land use
Flood-prone area
historically used as paddy(floodplain & hinterland)w
floofteawr

www.pref.shiga.lg.jp/h/ryuiki/

Flood-resistant area
historically used asresidence(natural levee)

Risk of flood
Provisioning service (rice,etc.)
Regulating services(reducing the risk of thedownstream, groundwater
recharge, etc.)
Cultural services(esthetics, recreations,education, etc.)
9Revealing multi-functionality of land use
Mapping disaster risks and ecosystem services tovisualize the multi-functionality (ongoing)

Risk of flood

Carbon sequestration

10

Conventional flood control
Natural/semi-naturalConcrete embankment- Higher flood risk
- Higher biodiversity andproductivity- Lower flood risk
- Lower biodiversity andproductivity〜1980ʼs

Materials provided by Dr. Yasushi Miyamoto

11Transdisciplinary platformMikatagoko Nature
Restoration Committee
Lakeshore Restoration WG
Vision: Restoring rich natural shorelinesthat nurture biodiversity while
maintaining flood control functions
Mission: participatory surveys,
developing guidelines, & harmonizing
flood control and nature restoration

residents
farmers

fishermen

othersschools

Place of mutual
understanding, discussion,consensus building
secretariat

researchers

tourism

government

NGOs

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Flood risk reduction &biodiversity conservation
Repeated dialogues to examine what the lakeshore
ought to be for risk reduction and biodiversity

13Creating a guideline
Guideline for lakeshore restoration- Based on traditional ecological knowledge- Cooperation among civil engineering, fisheries, andnatural environment sections of the local government- Explicit statement in the guideline allowing simplified
procedures for implementation
Consensus building
among fishermen, local
NGOs, government
officials, researchers, etc.

14

'Practice of shoreline restoration
Wisdom of traditional usage of floods- Development of new paddy fields by using the power offloods to move sediment (since the Edo period)- Promote sediment accumulation by the same way for
⼀般的な覆砂法による再⽣漁場よりも
restoring coastal sandy habitats
ベントス（シジミを含む）密度が⾼い

Guidingdike

Density of benthos（m-2）

Restoredsandyhabitats!"#$%&Materials provided by Dr. Yasushi Miyamoto

Includingshijimi clam((fisheries species)

commonly commonly-used way -used way①②

TEK-based15
way16