Session FT5.22: Integrated Risk Management in

Yorumlar

Transkript

Session FT5.22: Integrated Risk Management in
Session FT5.22:
Integrated Risk Management
in Mediterranean Towns:
Experience Sharing
Expert Panel
Prof. Dr. Veysel EROGLU
Director General of State Hydraulic Works
Flood is a natural event.
However, human interference converts it to a disaster!
Main causes of flood disasters
ƒ Changing in the land structure because of enlargement of the
settlement
ƒ Climate change effects on hydrological regimes
ƒ Engineering structures in the channel
ƒ Fast urbanization which results in higher runoff coefficient
ƒ Unsuitable agricultural activities
ƒ Deforestation
Effect of urbanization on flood runoff is important !
After
Before
Before
After
(figures are from the presentation of Akira Terakawa, ICHARM)
Lessons gained from the local
actions presented in the session
• Local action: “Early warning systems for
stormwater in cities of south of France”
• Physical protection is necessary but limited
• To manage floods, local authorities need to be
able to base their flood policy on prevention,
warnings, post-crisis analysis and feedback from
former experience
• Integrated solutions for flood management have
to be developed with involvement of local
authorities and sensibilization of the public
• Local action: “INUNDA - Minimization of flood
impacts in urban areas”
• This local action is a support to the
implementation of integrated flood risk
management
• This local action can be reproduced by defining
an integrated flood risk management plan at the
scale of the catchment basin
• Local action: “Risk management of urban rain
events in a coastal city: the case of Marseilles”
• The experience of the city of Marseilles in
managing rainfall risks is transposable to other
cities
• The decision-making model and the city
organisation for the municipal emergency action
plan can be reproduced in other cities
• Local Action: “Protection against flooding
in Great Tunis”
• A close cooperation between the different
stakeholders is needed
• The method presented could be generalized
among other flood threatened places in the
Mediterranean Region
Flood is very common hydrological disaster in Turkey
EDİRNE
BARTIN
KIRKLAR
ELİ
Lülebu
rgaz
İSTANBUL
KASATAMONU
Osmancık
Dodurga
En
ez
BURSA
SAKAR
DÜZCE
YA
BİLECİ
ESKİŞEHİR
K
KÜTA
HYA
K
ul
a
İZMİR
AYDIN
Söke
Bodrum
MUĞLA
Marmaris
Ardeşen
Çayeli
RİZE
ZONGULDAK
ÇORUM
Sungurlu
KIRIKKA
LE
AMASY
A
Turha
l
Pazar
YOZGAT
GİRES
UN
TOK
AT
Yağlıde
Dereli re
BAYBU
RT
ERZUR
UM
AĞ
RI
MUŞ
KAYSERİ
Cihanbeyli
Adilcev
az
BİTLİS
Bor
NİĞDE
Yüksek
ova
HAKK
ARİ
Harun
iye
OSMANİYE
FLOODED AREA IN 2004
FLOODED AREA IN 2003
Seyhan
Silifke
İÇEL
HATAY
Çaldıra
n
Hizan
KONYA
Derebucak Beyşehir
Bozkır
Aksu
Korkuteli
Serik
Manavgat
Kemer ANTALYA
Gazipaşa
Erciş
VAN
ELAZI
Ğ
AKSARAY
ARDAH
AN
O
f
ERZİNC
AN
Şefaatli
Al
pu
Güneysu
FLOODED AREA IN 2002
FLOODED AREA IN 2001
FLOOD EVENTS OF 2005 IN TURKEY
(FROM THE FLOOD INVENTORY MAP)
TURKEY
Mediterranean Sea
DISCHARGE ( m³/s)
BERDAN DAM (07-12.12.2001 )
HEIGHT ( m )
80.00
1200
Max Operation Height : 67.41
1000
70.00
60.00
800
Min Operation Height : 44.00
50.00
40.00
600
30.00
400
20.00
200
10.00
0.00
0
11.00 18.00 01.00 08.00 15.00 08.12. 05.00 12.00 19.00 02.00 09.00 16.00 23.00 06.00 13.00 20.00 03.00 10.00
08.12.200
09.12.2001
10.12.2001
11.12.2001
07.12.2001
12.12.2001
1
Inlet
Outlet
Height
Min Op.Height
Max Op.Height
• Nearly 1000 m3/s of discharge during the flood period flood has been prevented
without any harm, with the help of the Berdan Dam’s active volume.
• By this sample case, it is clearly seen that the systems with storage facilities
have positive effects on flood.
Recent decades flooding events with their costly
results have brought Turkey to
Hazard mitigation approach
The Flood Forecasting Center in DSI
New initiatives in flood forecasting
Mediterranean Sea
In summary
•
With respect to the risk management, preventive measures should be taken in:
• Retention areas
– Maintenance of controlled urbanization districts
– Conservation of nature
– Construction of reservoirs and regulating basins
• Detention areas
– Preservation of urbanization control zones
– Promotion of conditions favorable to agricultural activities
• Low-lying areas
– Development of drainage facilities
– Construction of storage facilities
– Encouragement of use of flood-proof building
Concluding remarks
•
•
•
•
•
Floods should be held in an integrated approach namely Integrated Flood
Management which should be a part of the Integrated Water Resources
Management
In Mediterranean region, the rain characteristics are similar
Involvement of various stakeholders in the planning process is a necessity
Hydrological impact assessment due to basin development should be
assessed and appropriate measures be taken for preventing or mitigating
the negative impacts
Floods should be considered before in the risk management:
• Risk mapping
• Public awareness and preparedness
• River improvement
• Preservation and restoration of river environment and
• Improvemment of education for citizens for historical, cultural and
ecological
value of the river
• Promotion of the natural and cultural heritage of the basin is
needed
Thank you…