docSession FT5.22: Integrated Risk Management in
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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 Changing in the land structure because of enlargement of the settlement Climate change effects on hydrological regimes Engineering structures in the channel Fast urbanization which results in higher runoff coefficient Unsuitable agricultural activities 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…
