Regional Management of Climate Impact Research

Transcription

1 Regional Management of Climate Impact Research Hans-Jochen Hinz Director 8 November 2011, Brussels

2 Agenda The agency of roads, bridges and waters (LSBG) Facts about Hamburg Protection against storm surges Protection against precipitation water Questions to science and policy

3 FOTO: FOTOLIA Landesbetrieb Straßen, Brücken und Gewässer - LSBG (Agency of roads, bridges and waters) GF Director Mr. Hinz A Division administration S Division roads K Division of bridges and engieering G Divison of waters and flood protection B Divison of operation and maintenance Mr. Heel Mr. Gerloff Mr. Krüger Dr. Müller Mr. Heimböckel Inside the public administration of Hamburg, the Agency of roads, bridges and waters (LSBG) is a service provider for the implementation and maintenance of technical infrastructure. The LSBG has 548 employees ( ). The LSBG develops a business plan due to 26 LHO and has an own work council. In 2010 the LSBG had a business volume of about 56 Mio. of charge and payment and 44 Mio. of operational resources. LSBG administrates about 185 Mio. construction and operational resources in trust.

4 GWh / a Substantial savings for public street lighting in Hamburg : starting value 61,96 GWh [100%] : reduction to 48,99 GWh [ - 21 %] 2020: target value 37 GWh [ - 40 %] "Ist-Verbrauch" energy consumption bis up to "Soll-Verbrauch" future energy consumption bis

5 Agenda The agency of roads, bridges and waters (LSBG) Facts about Hamburg Protection against storm surges Protection against precipitation water Questions to science and policy

6 Living with water in Hamburg

7 Hamburg: Regional Facts A city and a region 1.75 Mio. inhabitants (metropolitan region 4.2 Mio) Size: 755 square kilometres 17% Parks, recreation areas and Forest 8 % Waterbody

8 Natural hazards in Hamburg 2 flood related problems: storm surges & heavy rains

9 Agenda The agency of roads, bridges and waters (LSBG) Facts about Hamburg Protection against storm surges Protection against precipitation water Questions to science and policy

10 Hamburg at the Elbe River Storm surge on km 1095

11 Flooding risk areas local conditions 270 km 2 = 36 % of the city area 110 km North Sea Floods 15/16 th February1962 waterlevel NN + 5,70 m 61 cravasses 30 % of the city area flooded 320 death in Hamburg 3th January 1976 waterlevel NN + 6,45 m habor area was flooded inhabitants workplaces 10 Billion EUR worth of goods Characteristic forecast of the storm tide 8 bis 12 h in advance rising 5 m with 1,5 m/h THW TLW = 10 m

12 Strategy living with water Olivers schöne Folie rein Storm surge in the afternoon in the morning

13 cm PN (NN - 5 m) Climate Change: Increasing Sea Level Rise? MThw Cuxhaven In future? Up to now 25 cm/100 year (155 years) Gewässerkundliches Jahr

14 Adaptation of the main public flood protection : NN + 9,0 m?? About 500 Mio. for 100 km of dykes and sea-walls

15 Strategies against flooding by storm surges

16 Standards for Metropoletan Areas ~ 1 : : Similarities and differences in European coast protection Similarities : Strategies Differences: Standards and Calculation Methods

17 Standards for Metropoletan Areas ~ 1 : : Until 2050: Implementation of national coast protection Similarities and differences measures? in European coast protection Similarities : Strategies After 2050: Differences: Standards and Calculation Methods Implementation for a European coast protection strategy?

18 Agenda The agency of roads, bridges and waters (LSBG) Facts about Hamburg Protection against storm surges Protection against precipitation water Questions to science and policy

19 Challenges to inland flood protection Precipitation increases climate change is expected to amplify this trend Sealing of areas increases The growing city of Hamburg generates a need in residential and industrial. It is aimed to build 6000 new accommodations every year Densely populated areas like Hamburg provide specific characteristics of water management: high density of water ways small waters with small catchment areas

20 Urban growths between1935 and 2001

21 Wasserstand [mnn] Flash flood

22 Narrowed retention areas

23 Areas of potential significant flood risk in Hamburg

24 Flooded areas with HQ 200

25 Measures to reduce damages by precipitation flooding provisions for floodplain development restrictions for the designation of new settlement areas natural retention areas reduction of sealed surfaces increase of precipitation water storage capacities reactivation of former retention areas technical flood protection measures improvement of drainage infrastructure maintenance of waters removal of bottlenecks object protection

26 Retention basins in urban areas

27 Inland water drainage infrastrcture Wilhelmsburg

28 Extreme rain fall e.g. 80 mm in 24 h 1976 Water level 1976 Water level 1976 Height of buildings (dwelling mount) Pumping station Retention area Drainage Evacuation paths + dike heightening!

29 Agenda The agency of roads, bridges and waters (LSBG) Facts about Hamburg Protection against storm surges Protection against precipitation water Questions to science and policy

30 Measures against flooding by precipitation pro-active flood protection Adapted land use -... in the area -... in the river -... in the flood plain Technical concepts - dykes - flood protection walls - dwelling mounts - polders - storage reservoirs Flood risk management - comprehensive planning - resilient buildings - public risk awareness - risk assessment public precaution and self-responsibility Reduction of flood damage

31 Questions to science How will the Sea level behave in future? Will the precipitation increase in future? Will the probability of the occurrence of high river run-off and storm surges at the same time rise in future? Will the inland water storage capacity for three tides be sufficient in future?

32 Questions to policy Which strategies for coastal flood protection will be needed in future? Development of coordinated methods for consistent risk assessment and protection strategies on a European scale Transnational coastal defense strategies and concepts Financing for and effort-sharing in coastal protection