Komatina D. ISRBC, Integrated RBM The case of Sava River RBM
SLO_presentation_april2008
1. Flood Risk Management
supporting and limiting
Spatial Planning
Government of Republic of Slovenia
Ministry of the Environment and Spatial Planning
Environment Directorate
Department of waters
WG “F” - workshop
april 2008
Sašo Šantl, Darko Anzeljc
2. Legal basis
EU:
• Flood Directive
National:
• Water Act (2002): Detailed River Basin Management plans for protection
from harmful water effects (Flood risk management plan)
• Rules on the methodology for determination of hazard and risk
areas (adopted july 2007)
• Decree on terms and limitations for building in flood hazard
and risk areas (adoption planned in mid 2008)
• National Work Programme for Flood Risk Management
(adoption planned in mid 2008)
3. Preliminary flood risk assessment
FLOOD INDICATION/ WARNING MAP
FLOOD RISK MAPS
Time table (Flood Directive)
Flood risk management plan
2011
2013
2015
6 year period adoption
SIGNIFICANT FLOOD RISK
AND RETENTION AREAS
FLOOD HAZARD MAPS (xmpl)
• state spatial planning for flood
risk areas protection (weir,
reservoirs, levees,…)
• retention area preservation
• warning systems, rescue plans
Measures
Investment
realization
time
OTHER FLOOD RISK AND
RETENTION AREAS
Adopted by government State spatial planning
Modification
4. Flood indication/warning map
Purpose:
- information about flood (and erosion) conditions of the area,
- basis for spatial planning (limits, mapping),
- publicly available (scale 1:50000)
Basis:
- analysis of past events, historic/ archive data and past research.
Contents:
- flood and (erosion) areas
- registered events
- common information concerning floods and erosion
7. FLOOD RISK MAPS
Local spatial act
FLOOD HAZARD MAPS
Without uncoordinated increase of flood
hazard and risk upstream and downstream.
Realization of the
measures
Local spatial planning concerning FRM
Other flood risk and retention areas
Measures for reducing flood
hazard and risk
Revised by the Ministry (Institute for water)
Adopted by municipal council
Entered to the
common data base
Changed FLOOD RISK MAPS
Changed FLOOD HAZARD MAPS
Land use and construction
Supervised by the Ministry
(Agency for Environment)
Revised by the Ministry (Institute for water)
Entered to the common
data base after
realization of the
measures!
8. HAZARD INDICATION MAP
frequently flooded (2-5 y)
occasionally flooded (10-20 y)
seldom flooded (50+ y)
20km100 5
FLOOD INDICATION MAP
SIGNIFICANT FLOOD RISK AND
RETENTION AREAS
OTHER FLOOD RISK AND
RETENTION AREAS
Flood indication/warning map
9. HAZARD INDICATION MAP
frequently flooded (2-5 y)
occasionally flooded (10-20 y)
seldom flooded (50+ y)
20km100 5
FLOOD HAZARD INDICATION MAP
Flood mitigation measures -
SE part of Ljubljana
10. HAZARD INDICATION MAP
frequently flooded (2-5 y)
occasionally flooded (10-20 y)
seldom flooded (50+ y)
5km0
Flood mitigation measures -
SE part of Ljubljana
14. Flood/erosion hazard map
High flood hazard
where at flow Q100
H >= 1,5 m or
H * v >= 1,5 m2/s
Medium flood hazard
where at flow Q100
0,5 <= H < 1,5 m or
0,5 m2/s <= H * v < 1,5 m2/s
OR inside flow Q20 area
Low flood hazard
where at flow Q100
H < 0,5 m or
H * v < 0,5 m2/s
Remaining flood hazard
inside flow Q500 area AND
outside flow Q100 area
High erosion hazard
where at flow Q100
Dp > 2,0 m or
Dn > 1,0 m
Medium erosion hazard
where at flow Q100
0,5 m < Dp < 2,0 m or
0,3 m < Dn < 1,0 m
Low erosion hazard
where at flow Q100
Dp < 0,5 m or
Dn < 0,3 m
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