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4th International Symposium on Flood Defence Toronto, Ontario, Canada, May, 6-8, 2008 GREAT ODRA/ODER FLOOD IN 1997 – TEN YEARS AFTER Zbigniew W. Kundzewicz.

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Presentation on theme: "4th International Symposium on Flood Defence Toronto, Ontario, Canada, May, 6-8, 2008 GREAT ODRA/ODER FLOOD IN 1997 – TEN YEARS AFTER Zbigniew W. Kundzewicz."— Presentation transcript:

1 4th International Symposium on Flood Defence Toronto, Ontario, Canada, May, 6-8, 2008 GREAT ODRA/ODER FLOOD IN 1997 – TEN YEARS AFTER Zbigniew W. Kundzewicz Research Centre for Agricultural and Forest Environment, Polish Academy of Sciences, Poznań, Poland and Potsdam Institute for Climate Impact Research, Potsdam, Germany Piotr Kowalczak Institute of Meteorology and Water Management, Warsaw, Poland

2 Contents Introduction Odra/Oder flood of July 1997 in a nutshell Are we better prepared? Floods Directive Concluding remarks

3 Odra Oder The Odra: Length: 854 km ; Drainage basin: km 2. Therein: 742 km and km 2, respectively, are in Poland.

4 Data on 1997 floods in Poland (Odra and Vistula): 54 fatalities, 3205 B Euro damage (Munich Re), 2592 towns and villages flooded (therein 1362 – totally) houses and 725 bridges destroyed / damaged, ha flooded (therein ha farmland) people evacuated Action: firemen, soldiers, police, civilians and volunteers m 3 untreated sewage entered rivers per day

5 Contents Introduction Odra/Oder flood of July 1997 in a nutshell Are we better prepared? Floods Directive Concluding remarks

6 Summer 1997 precipitation in comparison to long-term average (Source: GPCC, GWS – Offenbach, Germany)

7 Communities inundated at the level above 30% Inundations between 5 and 30% Inundations below 5% Towns particularly affected by flooding Extent of 1997 floods in Poland

8 Propagation of flood wave in summer 1997 on the Odra Source: MKOOpZ (1999)

9 Comparison of stage levels [in cm] for several gauges on the Odra with the pre-1997 record and the alarm level (Source: MKOOpZ, 1999) Cross-section (1) Alarm level (2) Pre-1997 record level (3) Maximum level in 1997 (4) Maximum level in 1997 minus alarm level (4) - (2) Maximum level in 1997 minus pre record level (4) – (3) Odry Svinov Bohumin Chalupki Miedonia Krapkowice Opole Brzeg Most Brzeg Dolny Scinawa Cigacice Mietkow Slubice Frankfurt Widuchowa

10 Data: IMGW. Source: Kundzewicz, Szamałek & Kowalczak

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12 Flood and politics Mr Cimoszewicz (Prime Minister) stated publicly on 7 July that „those who had not been insured could not expect compensation for their losses“ Opposition: requested the Prime Minister to step down heavily criticized the performance of authorities demanded emergency status (delay parliamentary elections) Speculations: negative evaluation of authorities during the flood contributed to the result of parliamentary elections (and defeat of the ruling coalition)

13 Flooding in 1997 (Odra, Vistula), 2001 (Vistula), 2002 (Elbe) Similar atmospheric drivers: summer Vb events Flash floods in the mountains – huge water masses in large rivers, dike breaks, inundation of large areas = relief for downstream High return period upstream, decreasing downstream

14 Contents Introduction Odra/Oder flood of July 1997 in a nutshell Are we better prepared? Floods Directive Concluding remarks

15 The World Bank loan of US $200 M for repair of damages caused by the 1997 flood. Project components: - Rural and Municipal Infrastructure - Flood Management and Hazard Reduction - Project Administration and Technical Assistance

16 Ambitious plans of overhauling the flood preparedness system were made and partly implemented. Overhauling and upgrading of the technical infrastructure: - reconstruction and modernization of levees; - reconstruction, modernization, and building of new dams; - improving conveyance.

17 Total volume of dry flood protection storage in the drainage basin of the Odra: 28,55 mln m 3 Total volume of polders in the drainage basin of the Odra: 167,38 mln m 3 Pre-1997 situation

18 Construction of the polder Buków on the Odra (50,0 M m 3 ), two reservoirs on the Nysa Kłodzka (Topola and Kozielno, with capacities of 23,5 and 15 M m 3, respectively, and one reservoir on the Czerwonka stream (14 M m 3 ). On two existing reservoirs on the Nysa Kłodzka (Otmuchów and Nysa), the flood reserve has been increased by 70 M m 3.

19 “Create room for the river”: a village, Pilce, in the Kłodzko Valley was relocated, at the cost of appr. 3 million Euro, resulting in recovering of flood plain area of 400 ha. Broadening of river channel was implemented by shifting levees at kilometers on the Odra, between Domaszków and Tarchalice.

20 Modernization of the hydrometeorological service has been achieved, including organization, hardware (e.g. system of meteorological radars and supercomputer), and software. New system of warnings was set in place, and the forecast lead time grew from 6 to 48 and – in some towns downstreams – even to 72 hours. Awareness raising / capacity building

21 Considerable funds spent on preparatory works on two reservoirs: Racibórz on the Odra and Wielowieś Klasztorna on the Prosna. However, construction of these reservoirs has not started yet, due to inadequate funding.

22 Contents Introduction Odra/Oder flood of July 1997 in a nutshell Are we better prepared? Floods Directive Concluding remarks

23 European Union Floods Directive Preliminary flood risk assessment (including assessment of the projected impact of climate change trends; forecast of estimated consequences of future floods, …). Preparation of flood maps and indicative flood damage maps, covering the geographical areas which could be flooded with a high probability (return period of 10 years); with a medium probability (100 years), and with a low probability (extreme events). Preparation and implementation of flood risk management plans, aimed at achieving the required levels of protection.

24 Stavros Dimas, EU Commissioner for the Environment: The Floods Directive will help EU nations to: „improve flood protection over Europe” „chose the right tools with which to reduce the likelihood of floods and limit their impacts”

25 Timelines: Preliminary flood risk assessment should be completed at the latest three years after the date of entry into force of this Directive, reviewed (and if necessary updated) at the latest in 2018 and every six years thereafter. Flood risk maps completed by 22 Dec. 2013, reviewed (and if necessary updated) by 22 Dec and every six years thereafter. Flood risk management plans completed and published by 22 Dec. 2015, reviewed (and updated) by 22 Dec and every six years thereafter. [Co-ordination and synchronisation with WFD]

26 Contents Introduction Odra/Oder flood of July 1997 in a nutshell Are we better prepared? Floods Directive Concluding remarks

27 Major investments: The funding planned to be spent on improvement the flood preparedness system of the Odra basin in amounted to million Euro. The amount actually spent in was million Euro.

28 Poland joined the European Union as a full-fledge member on 1 May The EU Floods Directive is a binding document, that will undoubtedly help the nation in further improvements of flood protection and flood preparedness.


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