Recommendations on Preventive Measures in Spatial Planning for Natural Hasards in Salzburg

Transkript

1 Recommendations on Preventive Measures in Spatial Planning for Natural Hasards in Salzburg Friedrich Mair Departement for Spatial Planning of Salzburg Land (Regional Authority) Austrian Spatial Planning Conference ÖROK Connection of the Austrian Länder

2 ESPON Briefing 2

3 Natural hazards in Salzburg (only 22% of the area for settlement) 2 Floods 2002 and 2005 Mudslides and floods from torrents every year Avalanches in the mountainous areas Rock falls

4 The 100year flood on August 12th 2002 in Salzburg WasserZukunft Salzburg - 2. Oktober 2003

5 100year flood in Mittersill 2005 Quelle:

6 Why where so many buildings flooded in 2002 and 2005? Foto: LGK-Salzburg WasserZukunft Salzburg - 2. Oktober 2003

7 Many houses built in HQ 100 areas in Golling between WasserZukunft Salzburg - 2. Oktober 2003

8 What was wrong? We had old regulations In some areas no water marks The law was based on a 30year floods and not on 100year floods Like the level for the ground floor To many old buildings in areas which are significant for the outflow or retention of floodwater

9 Schärding high water marks more floods the last thirty years climate change Foto: Ref.: 7/2, Überörtliche Raumplanung

10 Flood plans of our torrents for the whole country WLV Sektion Salzburg, Stand WasserZukunft Salzburg - 2. Oktober 2003

11 Incomplete high water marks for the rivers (green) FA 6/6, Mai 2003 WasserZukunft Salzburg - 2. Oktober 2003

12 What is necessary? Land use planning needs updated and complete High water marks for rivers Risk zone plans for torrents (red and yellow zones) Regulations based at least on HQ 100 Risk prevention for the existing settlement areas

13 High water protection measure law 2004 in Salzburg (other Länder followed) Mark areas of mayor significance for the outflow or retention of floodwater in the regional plans and local plans No zoning in HQ 30 areas and in areas which are significant for the outflow and retention of floodwater (between HQ30 and HQ100) In some Länder HQ100 but with exceptions No building permission in these areas The altitude of the ground floor has to be at least 15 cm over HQ 100

14 Keep free significant areas for the outflow and retention of floodwater! Foto: LGK-Salzburg WasserZukunft Salzburg - 2. Oktober 2003

15 No permission to build in areas with significance for the outflow and retention of floodwater Foto: LGK-Salzburg WasserZukunft Salzburg - 2. Oktober 2003

16 Raise the altitude for the ground floor over HQ 100! WasserZukunft Salzburg - 2. Oktober 2003

17 Oilfire law, oiltanks should not swim up Foto: LGK-Salzburg WasserZukunft Salzburg - 2. Oktober 2003

18 Construction law In dangerous areas municipalities need to be able to make regulations for existing buildings in HQ100 areas for oil tanks for cellar shafts, etc

19 Folder: Highwater protection in planning and building Quelle: FA6/6, Wasserwirtschaft

20 Measures against floods in Salzburg city Mayburgerkai Foto: C. Wiesenegger, Fachabteilung 6/6

21

22 Prevention-projekt Mittersill widen teh river and dam Quelle: Marshallplan-Oberpinzgau

23 Dam in Kuchl Traunsteiner Verbau Begrünte Steinmauer mit Übergang zur Weganhebung Foto: Fachabteilung 6/6

24 Summary We need protection measures for the existing buildings in the flooded areas We need a strong legislative basis And a good controlling system People and politicans forget the danger very fast

25 Let us provide, The next flood is coming definitly! Thank you!