Open Days Brussels Workshops October 2008 Workshop 1: Will Our Generation be forgiven? Local Solutions to Global Problems – 7 October 2008 Flood Risk Management.

Open Days Brussels Workshops October 2008

Workshop 1: Will Our Generation be forgiven? Local Solutions to Global Problems

– 7 October 2008

Flood Risk Management – First Results for the

Saxon Part of the Elbe River Basin Prof. Dr. Martin Socher Section Head Surface Water and Flood Protection

Saxon State Ministry for Environment and Agriculture, Dresden, Germany

Referat:

Oberflächengewässer / Hochwasserschutz

2008/10/07

Sächsisches Staatsministerium für Umwelt und Landwirtschaft

Autor:

Prof. Dr. Martin Socher/Elfie Defèr

Folie 2

August 2002: Elbe and Eastern Ore Mountain Floods

Referat:


2008/10/07


Autor:


Folie 3

August 2002: torrential rains in Bohemia/Ore Mountains of up to 340 mm per day (highest ever recorded values in daily precipitation for Germany) caused floods in the Elbe river and its tributaries unprecedented in written history in Saxony

Losses and damages:

• 21 fatalities • 25 000 houses, hospitals, kindergardens damaged (400 destroyed);• 12 000 immediately affected enterprises;• 740 km destroyed or heavily damaged roads;• 20% destroyed or heavily damaged railway network;• 466 destroyed or heavily damaged bridges;• 280 damaged social facilities;• 11% of all schools and 233 sports clubs damaged;• 10% of all hospitals evacuated; • Heavy damage affecting cultural facilities and monuments

Overall damages: 6.2 billion Euro

Referat:


2008/10/07


Autor:


Folie 4

Spring 2006 – Elbe Flood - Gohlis

Referat:


2008/10/07


Autor:


Folie 5

Forward-looking flood protection –Flood protection strategy of the Free State of Saxony

Prepare real-time flood-fighting by

Avoiddamage-proneobjects by

Raise floodprotection levelby

Reduce floodwater amount by

Raiseawareness

Warn and combat

Retain and combat by constructionfacilities – reservoirs, retention basins, dykes,

polders, river bed reconstruction

runoff reduction and retention on the surface –in the forest, on the field, on public and private areas;

legal assignment of flood formation areas

legal assignment of flood plains, no new construction areas in flood plains,

individual buildings in flood plains in case of no significant effect only, flood protection concepts,

flood protection action plan, assignment of proirity areas in regional development plans for legally assigned

flood plains and areas in danger of flooding

develop awarenessAdapt construction to floods

,

Public responsibility

State/ municipality

Individualrespon-sibility(citizen)

Further-reachingprevention/protection

Technicalprotection

Preventiveland use

Precautionaryplanning

Individualpreventive

action

There is no absolute protection!

Referat:


2008/10/07


Autor:


Folie 6

The implementation of this strategy is based on following pillars:

1. Sustainable reconstruction after the 2002 flood disaster by taking into account future flood protection requirements at this stage already.

2. Development and implementation of 1600 flood protection measures (FPM) and 547 hazard maps based Flood Protection Concepts (FPC) had to be elaborated (47 concepts in total including the Saxon part of the Elbe).

Object category Reference value (recurrence interval in years)

Closed settlements 100

Single buildings, not permanently

inhabited settlements 25

Industry plants 100

Supraregional infrastructure 100

Regional infrastructure 25

Agricultural land 5

Special objects Case-by-case determination

Natural landscapes -

Referat:


2008/10/07


Autor:


Folie 7

3. Second Law Amending the Saxon Water Law of 09/08/2004

Main Content: (1) flood prevention and protection planning/river basin-

based FPC, (2) special permitting conditions for construction measures in

flood formation areas, (3) improved maintenance of dykes and reservoirs

(4) Enhancement of public information on flood-prone areas, legal

obligation to register such areas in the land register (5) hazard maps.

4. Saxon flood alert system

- concentration of flood forecasting and flood alert messages at a single Landeshochwasserzentrum (State Flood Centre)

- reorganisation of data and messages dissemination system

- urging and assisting municipalities in establishing flood defence

brigades.

Referat:


2008/10/07


Autor:


Folie 8

Results of State-wide Prioritisation of Flood Protection Measures

Category of Prioritisation Costs [ T€ ]

High 1.181.982

Medium 583.971

Low 181.936

Total 1.947.889

Category of Prioritisation

Number of Measures

High 268

Medium 780

Low 548

Without Category 7

Total 1.603

Distribution of number of measures

17%

49%

34%

high medium low

Distribution of investment demand

61%

30%

9%

high medium low

Referat:


2008/10/07


Autor:


Folie 9

Integrated Water Reservoir Management

● Flexibility between functions● Seasonal flexibility● Reaction on threats such as flood and drought● Integration into larger schemes such as cascades, river basin management● Integration of up-stream and down-stream interests● Differentiation between strategic and operational time scale

Multifunctional dams/reservoirs with adaptive management

Functions: Hydropower, flood protection, fishery, water supply,tourism, navigation, ecology

Adaptive Management:

Referat:


2008/10/07


Autor:


Folie 10

New Flood Protection Measures … Flood Control Reservoir Lauenstein/Müglitz

Referat:


2008/10/07


Autor:


Folie 11

Herzlichen Dank für Ihre Aufmerksamkeit!Thank you for your attention.

Open Days Brussels Workshops October 2008 Workshop 1: Will Our Generation be forgiven? Local Solutions to Global Problems – 7 October 2008 Flood Risk Management.

Documents

martin socherelfie defr

elbe flood gohlis folie

germany folie

flood prevention

flood forecasting

flood disaster

euro folie

flood protection measures